阅读说明：本技术 一种负离子面料及其制备方法 (Negative ion fabric and preparation method thereof ) 是由 蒋贵阳 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种负离子面料及其制备方法,涉及面料技术领域。本发明将3-己烯二酸和4-癸烯酸缩水甘油酯共同反应后制得改性聚己烯二酸整理液,用聚乳酸-氨基酸和氧化葡聚糖对纳米二氧化钛进行包裹形成微囊化纳米二氧化钛负离子处理液,先将棉府绸织物在改性聚己烯二酸整理液中二浸二轧后制得整理后的棉府绸织物,然后用微囊化纳米二氧化钛负离子处理液对整理后的棉府绸织物进行浸渍,预烘,焙烘,水洗,烘干得到负离子面料。本发明制备的负离子面料中负离子发生材料分散性好且面料具有良好的抗皱性能、吸湿性以及耐水洗性能。(The invention discloses a negative ion fabric and a preparation method thereof, and relates to the technical field of fabrics. The invention makes 3-hexenedioic acid and 4-decenoic acid glycidyl ester react together to prepare modified polyhexenedioic acid finishing liquid, wraps nano titanium dioxide with polylactic acid-amino acid and oxidized glucan to form microencapsulated nano titanium dioxide negative ion treatment liquid, firstly dips and rolls the cotton poplin fabric in the modified polyhexenedioic acid finishing liquid twice to prepare the finished cotton poplin fabric, and then dips, pre-dries, washes and dries the finished cotton poplin fabric with the microencapsulated nano titanium dioxide negative ion treatment liquid to obtain the negative ion fabric. The anion generating material in the anion fabric prepared by the invention has good dispersibility, and the fabric has good crease resistance, hygroscopicity and water washing resistance.)

1. The negative ion fabric is characterized by mainly comprising 20-22 parts by weight of cotton poplin fabric, 30-36 parts by weight of modified polyhexamethylene adipate finishing liquid and 42-48 parts by weight of microencapsulated nano titanium dioxide negative ion treatment liquid.

2. The negative ion fabric of claim 1, wherein the modified polyethylene diacid finishing liquid is prepared by reacting 3-hexenedioic acid with glycidyl 4-decenoate.

3. The negative ion fabric of claim 2, wherein the microencapsulated nano titanium dioxide negative ion treatment solution is prepared by coating nano titanium dioxide with polylactic acid-amino acid and oxidized dextran.

4. The negative ion fabric of claim 3, wherein the negative ion fabric mainly comprises the following raw material components in parts by weight: 20 parts of cotton poplin fabric, 30 parts of modified hexanedioic acid finishing liquid and 45 parts of microencapsulated nano titanium dioxide negative ion treatment liquid.

5. The preparation method of the negative ion fabric is characterized by mainly comprising the following preparation steps:

(1) adding an initiating solution into a mixed solution of 3-hexenedioic acid and 4-decenoic acid glycidyl ester at a certain temperature to prepare a modified polyethylene diacid finishing solution;

(2) mixing butyl titanate and absolute ethyl alcohol to obtain a solution A, mixing deionized water and absolute ethyl alcohol under the regulation and control of the pH value of glacial acetic acid to obtain a solution B, dripping the solution B into the solution A to obtain a nano titanium dioxide sol, mixing polylactic acid-amino acid and oxidized glucan, adding the nano titanium dioxide sol, stirring, dialyzing, sequentially adding a sodium borohydride solution, epichlorohydrin and a sodium hydroxide solution, and finally obtaining an microencapsulated nano titanium dioxide anion treatment solution;

(3) completely soaking the cotton poplin fabric in the modified polyethylene diacid finishing liquid obtained in the step (1), soaking twice, rolling twice, and drying to obtain a finished cotton poplin fabric;

(4) and (3) soaking the cotton poplin fabric finished in the step (3) in the microencapsulated nano titanium dioxide negative ion treatment solution obtained in the step (2), pre-drying, baking, washing and drying to obtain the finished product negative ion fabric.

6. The preparation method of the negative ion fabric according to claim 5, which is characterized by mainly comprising the following preparation steps:

(1) adding 3-hexenedioic acid and deionized water with the mass of 3-hexenedioic acid being 3-5 times that of the 3-hexenedioic acid into a four-neck flask, heating to 40-80 ℃, mixing a sodium persulfate solution with the mass fraction of 20% with a sodium bisulfite solution with the mass fraction of 2% with the mass fraction of 30 times that of the sodium persulfate solution to obtain an initiating solution, dripping the initiating solution with the mass of 0.005-0.01 time that of the 3-hexenedioic acid and 4-decenoic acid glycidyl ester with the mass of 0.03-0.05 time that of the 3-hexenedioic acid into the four-neck flask at 60 drops/min, preserving heat for 2 hours after finishing dripping, and then heating to 80-90 ℃ and preserving heat for 1 hour to obtain a modified polyethylene diacid finishing liquid;

(2) at room temperature, dissolving tetrabutyl titanate in absolute ethyl alcohol with the mass of 2.8-3.0 times of that of tetrabutyl titanate, stirring for 15-20 min on a magnetic stirrer at the rotating speed of 500-800 r/min, adding an inhibitor glacial acetic acid with the mass of 0.8-1.2 times of that of tetrabutyl titanate, and stirring for 15-20 min at the rotating speed of 800-1000 r/min to prepare a solution A; in addition, anhydrous ethanol with the mass of 1.4-1.5 times of that of the tetrabutyl titanate and deionized water with the mass of 0.12-0.13 time of that of the tetrabutyl titanate are uniformly mixed to prepare a solution B; stirring the solution A on a magnetic stirrer with the rotating speed of 1200-1500 r/min, dripping the solution B into the solution A at the titration speed of 40 drops/min, wherein the mass of the dripping solution B is 0.8-1.2 times of that of the solution A, and continuously stirring for 10min after dripping is finished to obtain nano titanium dioxide sol; mixing oxidized dextran solution and polylactic acid-amino acid solution with the mass 3 times that of the oxidized dextran solution, adding dimethyl sulfoxide with the mass 30 times that of the oxidized dextran solution and nano titanium dioxide sol with the mass 0.8-1.0 times that of the oxidized dextran solution, stirring at the rotating speed of 1200-1500 r/min for 30min, and dialyzing at the temperature of 4 ℃ for 4h by taking water as a medium to obtain untreated microencapsulated nano titanium dioxide sol; mixing untreated microencapsulated nano titanium dioxide sol and sodium borohydride solution with the mass fraction of 1 percent, which is 10 times of the mass of the untreated microencapsulated nano titanium dioxide sol, for reaction to obtain pretreated microencapsulated nano titanium dioxide sol; mixing the pretreated microencapsulated nano titanium dioxide sol with epichlorohydrin which is 10 times of the mass of the pretreated microencapsulated nano titanium dioxide sol, stirring at the rotating speed of 1200-1500 r/min for 20-30 min, adding sodium hydroxide solution which is 15 times of the mass of the pretreated microencapsulated nano titanium dioxide sol and has the mass fraction of 20%, and continuously stirring for 50-60 min to obtain the microencapsulated nano titanium dioxide anion treating fluid.

(3) Soaking the cotton poplin fabric in the modified polyethylene diacid finishing liquid obtained in the step (1) with the mass 1.5 times of that of the cotton poplin fabric, continuously drying for 2 hours at the temperature of 80 ℃ after a two-dipping and two-rolling process with the padding temperature of 23-27 ℃ and the rolling residual rate of 70-80 percent, and finally obtaining the finished cotton poplin fabric;

(4) soaking the cotton poplin fabric finished in the step (3) in the microencapsulated nano titanium dioxide negative ion treatment liquid obtained in the step (2) with the mass 2.25 times that of the cotton poplin fabric for 3-5 min, pre-drying at 80 ℃ for 1h, then baking at 120 ℃ for 2-3 min, then washing the baked fabric with water, and finally drying at 80 ℃ for 1h to obtain the finished product negative ion fabric.

7. The method for preparing the negative ion fabric according to claim 6, wherein the dialysis bag used in the dialysis in the step (2) is a dialysis bag with a molecular weight cut-off of 1500.

8. The method for preparing the negative ion fabric according to claim 6, wherein the polylactic acid-amino acid solution prepared in the step (2) is prepared by: mixing lactic acid, L-lysine accounting for 0.11-0.12 time of the mass of the lactic acid and polyethylene glycol accounting for 0.05-0.06 time of the mass of the lactic acid, stirring for 3 hours at the rotating speed of 500-800 r/min, adding a catalyst stannous chloride accounting for 0.007 time of the mass of the lactic acid, controlling the temperature to be 110 ℃ and the stirring rotating speed to be 800-1200 r/min, and stirring for 10 hours to obtain the polylactic acid-amino acid solution.

9. The method for preparing the negative ion fabric according to claim 6, wherein the oxidized dextran solution prepared in the step (2) is prepared by: dissolving glucan in phosphate buffer solution with pH of 4.5 and the mass of 1.5 times of that of the glucan, adding potassium periodate with the mass of 1.2-1.3 times of that of the glucan, continuously stirring for 15min at room temperature at 1500r/min, placing in a dialysis bag with the molecular weight cutoff of 1800, and dialyzing for 2 days at 4 ℃ by taking water as a medium to obtain oxidized glucan solution.

Technical Field

The invention relates to the technical field of fabrics, in particular to a negative ion fabric and a preparation method thereof.

Background

With the continuous progress of society and the continuous development of science and technology, negative ion fabric products are also continuously manufactured, and negative ions released by the fabric have positive promotion effects on human bodies and the environment, such as cell activation, metabolism promotion, cardiovascular function improvement, air purification, sterilization and disinfection and the like.

Although many methods for preparing the anion fabric exist at present, the preparation methods have some defects, such as high requirement on the ultramicro technology of the anion generating material, poor dispersibility in spinning solution and poor mechanical properties of the obtained anion fiber; or although the negative influence on the mechanical property of the fiber is relatively small, the poor crease resistance and water washing resistance of the anion fabric still is a problem which needs to be improved urgently; therefore, the anion fabric with good washing resistance, good crease resistance and good dispersibility of the anion generating material is researched and developed.

Disclosure of Invention

The invention aims to provide a negative ion fabric and a preparation method thereof, and aims to solve the problems in the prior art.

In order to solve the technical problems, the invention provides the following technical scheme:

the negative ion fabric mainly comprises, by weight, 20-22 parts of a cotton poplin fabric, 30-36 parts of a modified polyhexamethylene diacid finishing liquid and 42-48 parts of a microencapsulated nano titanium dioxide negative ion treatment liquid.

Further, the modified polyethylene diacid finishing liquid is prepared by reacting 3-hexenedioic acid with 4-decenoic acid glycidyl ester.

Furthermore, the microencapsulated nano titanium dioxide anion treatment solution is prepared by coating nano titanium dioxide with polylactic acid-amino acid and oxidized glucan.

Further, the negative ion fabric mainly comprises the following raw material components in parts by weight: 20 parts of cotton poplin fabric, 30 parts of modified polyhexamethylene diacid finishing liquid and 45 parts of microencapsulated nano titanium dioxide negative ion treatment liquid.

Further, a preparation method of the negative ion fabric mainly comprises the following preparation steps:

(1) adding an initiating solution into a mixed solution of 3-hexenedioic acid and 4-decenoic acid glycidyl ester at a certain temperature to prepare a modified polyethylene diacid finishing solution;

(2) mixing butyl titanate and absolute ethyl alcohol to obtain a solution A, mixing deionized water and absolute ethyl alcohol under the regulation and control of the pH value of a glacial acetic acid solution to obtain a solution B, dripping the solution B into the solution A to obtain a nano titanium dioxide sol, mixing polylactic acid-amino acid and oxidized glucan, adding the nano titanium dioxide sol, stirring, dialyzing, sequentially adding a sodium borohydride solution, epichlorohydrin and a sodium hydroxide solution, and finally obtaining an microencapsulated nano titanium dioxide anion treatment solution;

(3) completely soaking the cotton poplin fabric in the modified polyethylene diacid finishing liquid obtained in the step (1), soaking twice, rolling twice, and drying to obtain a finished cotton poplin fabric;

(4) and (3) soaking the cotton poplin fabric finished in the step (3) in the microencapsulated nano titanium dioxide negative ion treatment solution obtained in the step (2), pre-drying, baking, washing and drying to obtain the finished product negative ion fabric.

Further, the preparation method of the negative ion fabric mainly comprises the following preparation steps:

(1) adding 3-hexenedioic acid and deionized water with the mass of 3-hexenedioic acid being 3-5 times that of the 3-hexenedioic acid into a four-neck flask, heating to 40-80 ℃, mixing a sodium persulfate solution with the mass fraction of 20% with a sodium bisulfite solution with the mass fraction of 2% with the mass fraction of 30 times that of the sodium persulfate solution to obtain an initiating solution, dripping the initiating solution with the mass of 0.005-0.01 time that of the 3-hexenedioic acid and 4-decenoic acid glycidyl ester with the mass of 0.03-0.05 time that of the 3-hexenedioic acid into the four-neck flask at 60 drops/min, preserving heat for 2 hours after finishing dripping, and then heating to 80-90 ℃ and preserving heat for 1 hour to obtain a modified polyethylene diacid finishing liquid;

(2) at room temperature, dissolving tetrabutyl titanate in absolute ethyl alcohol with the mass of 2.8-3.0 times of that of tetrabutyl titanate, stirring for 15-20 min on a magnetic stirrer at the rotating speed of 500-800 r/min, adding an inhibitor glacial acetic acid with the mass of 0.8-1.2 times of that of tetrabutyl titanate, and stirring for 15-20 min at the rotating speed of 800-1000 r/min to prepare a solution A; in addition, anhydrous ethanol with the mass of 1.4-1.5 times of that of the tetrabutyl titanate and deionized water with the mass of 0.12-0.13 time of that of the tetrabutyl titanate are uniformly mixed to prepare a solution B; stirring the solution A on a magnetic stirrer with the rotating speed of 1200-1500 r/min, dripping the solution B into the solution A at the titration speed of 40 drops/min, wherein the mass of the dripping solution B is 0.8-1.2 times of that of the solution A, and continuously stirring for 10min after dripping is finished to obtain nano titanium dioxide sol; mixing oxidized dextran solution and polylactic acid-amino acid solution with the mass 3 times that of the oxidized dextran solution, adding dimethyl sulfoxide with the mass 30 times that of the oxidized dextran solution and nano titanium dioxide sol with the mass 0.8-1.0 times that of the oxidized dextran solution, stirring at the rotating speed of 1200-1500 r/min for 30min, and dialyzing at the temperature of 4 ℃ for 4h by taking water as a medium to obtain untreated microencapsulated nano titanium dioxide sol; mixing untreated microencapsulated nano titanium dioxide sol and sodium borohydride solution with the mass fraction of 1 percent, which is 10 times of the mass of the untreated microencapsulated nano titanium dioxide sol, for reaction to obtain pretreated microencapsulated nano titanium dioxide sol; mixing the pretreated microencapsulated nano titanium dioxide sol with epichlorohydrin which is 10 times of the mass of the pretreated microencapsulated nano titanium dioxide sol, stirring at the rotating speed of 1200-1500 r/min for 20-30 min, adding sodium hydroxide solution which is 15 times of the mass of the pretreated microencapsulated nano titanium dioxide sol and has the mass fraction of 20%, and continuously stirring for 50-60 min to obtain the microencapsulated nano titanium dioxide anion treating fluid.

(3) Soaking the cotton poplin fabric in the modified polyethylene diacid finishing liquid obtained in the step (1) with the mass 1.5 times of that of the cotton poplin fabric, continuously drying for 2 hours at the temperature of 80 ℃ after a two-dipping and two-rolling process with the padding temperature of 23-27 ℃ and the rolling residual rate of 70-80 percent, and finally obtaining the finished cotton poplin fabric;

(4) soaking the cotton poplin fabric finished in the step (3) in the microencapsulated nano titanium dioxide negative ion treatment liquid obtained in the step (2) with the mass 2.25 times that of the cotton poplin fabric for 3-5 min, pre-drying at 80 ℃ for 1h, then baking at 120 ℃ for 2-3 min, then washing the baked fabric with water, and finally drying at 80 ℃ for 1h to obtain the finished product negative ion fabric.

Further, the dialysis bag used in the dialysis in the step (2) is a dialysis bag with the molecular weight cut-off of 1500.

Further, the preparation method of the polylactic acid-amino acid solution in the step (2) comprises the following steps: mixing lactic acid, L-lysine accounting for 0.11-0.12 time of the mass of the lactic acid and polyethylene glycol accounting for 0.05-0.06 time of the mass of the lactic acid, stirring for 3 hours at the rotating speed of 500-800 r/min, adding a catalyst stannous chloride accounting for 0.007 time of the mass of the lactic acid, controlling the temperature to be 110 ℃ and the stirring rotating speed to be 800-1200 r/min, and stirring for 10 hours to obtain the polylactic acid-amino acid solution.

Further, the preparation method of the oxidized dextran solution in the step (2) comprises the following steps: dissolving glucan in phosphate buffer solution with pH of 4.5 and the mass of 1.5 times of that of the glucan, adding potassium periodate with the mass of 1.2-1.3 times of that of the glucan, continuously stirring for 15min at room temperature at 1500r/min, placing in a dialysis bag with the molecular weight cutoff of 1800, and dialyzing for 2 days at 4 ℃ by taking water as a medium to obtain oxidized glucan solution.

Compared with the prior art, the invention has the following beneficial effects:

when the negative ion fabric is manufactured, cotton poplin is used as a fabric base layer, the fabric base layer is finished by modified polyhexamethylene diacid obtained by the reaction of 3-hexenedioic acid and 4-decenoic acid glycidyl ester to obtain the finished fabric base layer, the nano titanium dioxide is wrapped by polylactic acid-amino acid and glucan oxide to form microencapsulated nano titanium dioxide negative ion treatment liquid, and the negative ion fabric is obtained by dipping, pre-drying, baking, washing and drying the fabric base layer.

Firstly, 3-hexenedioic acid and 4-decenoic acid glycidyl ester are subjected to redox reaction to initiate polymerization to generate modified polyhexenedioic acid, the modified polyhexenedioic acid reacts with fiber macromolecules of a fabric substrate to form stable covalent bond crosslinking to connect adjacent molecular chains in cellulose, wherein the 4-decenoic acid glycidyl ester has a 4-decenoic acid ester double bond with high activity and can be well grafted to the polyhexenedioic acid, meanwhile, an epoxy group on the 4-decenoic acid glycidyl ester is introduced to a polyhexene diacid macromolecular chain to obtain the modified polyhexene diacid, the fabric substrate is fully soaked in the modified polyhexene diacid to enable the fiber macromolecules in the fabric to be fully contacted with the modified polyethylene diacid, and the epoxy group on the modified polyethylene diacid is subjected to ring opening under the action of carboxyl groups on the cellulose macromolecules under an acidic condition, a special nucleophilic substitution reaction is formed to generate a stable covalent bond which is connected with cellulose macromolecules, and the stable covalent bond is used for replacing a hydrogen bond, so that the breakage or the disassembly of the molecular chain is limited, and the crease resistance of the fabric substrate is improved; in addition, the modified polyhexamethylene adipamide contains a large amount of adipic anhydride structures and carboxylic acid groups, and stable covalent bond crosslinking is formed between the modified polyhexamethylene adipamide and the fiber macromolecules under the action of esterification reaction in the process of finishing the fabric base layer to connect adjacent molecular chains in cellulose, so that relative sliding between the fiber macromolecules is limited, the elastic restoring force of the deformed fibers is improved, and the crease resistance of the fabric base layer is further improved.

Secondly, polylactic acid-amino acid and oxidized glucan are crosslinked to form a microgel structure to coat the nano titanium dioxide, on one hand, the polylactic acid-amino acid and the oxidized glucan can microencapsulate the nano titanium dioxide, so that the oxidized glucan with hydrophilicity is exposed on the surface of the microcapsule, thereby not only improving the dispersibility of the nano titanium dioxide, but also increasing the hygroscopicity of the nano titanium dioxide; on the other hand, due to the degradability of polylactic acid-amino acid, the coating layer on the surface of the nano titanium dioxide can be made porous in the subsequent alkali soaking treatment and use process, so that the dispersibility of the nano titanium dioxide is further improved; the polylactic acid-amino acid in the microcapsule reacts with carbonyl on polyhexamethylene diacid on the finished fabric base layer to generate a Schiff base compound, and diamine bridges in the Schiff base compound stably connect microencapsulated nano titanium dioxide on the fabric base layer, so that the water washing resistance of the fabric is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to more clearly illustrate the method provided by the invention, the following examples are used for detailed description, and the test method of each index of the negative ion fabric manufactured in the following examples is as follows:

water washing resistance: the water washing resistance of the anion fabric is measured by the change of the anion generation amount before and after the anion fabric prepared in the embodiment and the comparative example is washed by water for 100 times, and the anion generation amount of the anion fabric is measured according to GB/T30128.

Anti-wrinkle property: the wrinkle recovery angle of the negative ion fabrics prepared in the examples and the comparative examples was measured according to the GB/T3819 standard method.

Example 1

The negative ion fabric mainly comprises the following components in parts by weight: 20 parts of cotton poplin fabric, 30 parts of modified polyhexamethylene diacid finishing liquid and 45 parts of microencapsulated nano titanium dioxide negative ion treatment liquid.

The preparation method of the negative ion fabric mainly comprises the following preparation steps:

(1) adding 3-hexenedioic acid and deionized water with the mass 3 times that of the 3-hexenedioic acid into a four-neck flask, heating to 60 ℃, mixing a sodium persulfate solution with the mass fraction of 20% and a sodium bisulfite solution with the mass fraction of 2% and the mass fraction of 30 times that of the sodium persulfate solution to obtain an initiating solution, dripping the initiating solution with the mass 0.01 time that of the 3-hexenedioic acid and 4-decenoic acid glycidyl ester with the mass 0.05 time that of the 3-hexenedioic acid into the four-neck flask at a rate of 60 drops/min, preserving heat for 2h after finishing dripping, and then heating to 80 ℃ and preserving heat for 1h to obtain a modified polyethylene diacid finishing liquid;

(2) at room temperature, dissolving tetrabutyl titanate in absolute ethyl alcohol with the mass of 2.8 times of that of tetrabutyl titanate, stirring for 20min on a magnetic stirrer at the rotating speed of 800r/min, adding an inhibitor glacial acetic acid with the mass of 1.2 times of that of tetrabutyl titanate, and continuously stirring for 20min at the rotating speed of 1000r/min to prepare a solution A; in addition, anhydrous ethanol with the mass of 1.4 times of that of tetrabutyl titanate and deionized water with the mass of 0.12 time of that of tetrabutyl titanate are uniformly mixed to prepare a solution B; stirring the solution A on a magnetic stirrer with the rotating speed of 1500r/min, dripping the solution B into the solution A at the titration speed of 40 drops/min, wherein the mass of the dripping solution B is 0.8 times of that of the solution A, and continuously stirring for 10min after dripping is finished to obtain nano titanium dioxide sol; mixing oxidized dextran solution and polylactic acid-amino acid solution with the mass of 3 times that of the oxidized dextran solution, adding dimethyl sulfoxide with the mass of 30 times that of the oxidized dextran solution and nano titanium dioxide sol with the mass of 1.0 time that of the oxidized dextran solution, stirring at the rotating speed of 1500r/min for 30min, and dialyzing at the temperature of 4 ℃ for 4h by taking water as a medium to obtain untreated microencapsulated nano titanium dioxide sol; mixing untreated microencapsulated nano titanium dioxide sol and sodium borohydride solution with the mass fraction of 1 percent, which is 10 times of the mass of the untreated microencapsulated nano titanium dioxide sol, for reaction to obtain pretreated microencapsulated nano titanium dioxide sol; mixing the pretreated microencapsulated nano titanium dioxide sol with epichlorohydrin which is 10 times of the mass of the pretreated microencapsulated nano titanium dioxide sol, stirring at the rotating speed of 1500r/min for 30min, then adding sodium hydroxide solution which is 15 times of the mass of the pretreated microencapsulated nano titanium dioxide sol and has the mass fraction of 20%, and continuously stirring for 60min to obtain microencapsulated nano titanium dioxide negative ion treatment solution;

(3) soaking the cotton poplin fabric in a two-dipping two-rolling process with the padding temperature of 25 ℃ and the rolling residue rate of 75% in the modified polyethylene diacid finishing liquid obtained in the step (1) with the mass of 1.5 times of that of the cotton poplin fabric, and then continuously drying for 2 hours at the temperature of 80 ℃ to finally obtain the finished cotton poplin fabric;

(4) soaking the cotton poplin fabric finished in the step (3) in the microencapsulated nano titanium dioxide negative ion treatment solution obtained in the step (2) with the mass 2.25 times that of the cotton poplin fabric for 3min, pre-drying at 80 ℃ for 1h, then baking at 120 ℃ for 3min, then washing the baked fabric with water, and finally drying at 80 ℃ for 1h to obtain the finished product negative ion fabric.

Further, the dialysis bag used in the dialysis in the step (2) is a dialysis bag with the molecular weight cut-off of 1500.

Further, the preparation method of the polylactic acid-amino acid solution in the step (2) comprises the following steps: mixing lactic acid, L-lysine with a mass of 0.12 time of that of the lactic acid and polyethylene glycol with a mass of 0.06 time of that of the lactic acid, stirring at a rotating speed of 800r/min for 3h, adding a catalyst stannous chloride with a mass of 0.007 time of that of the lactic acid, controlling the temperature at 110 ℃ and the stirring rotating speed at 1200r/min, and stirring for 10h to obtain the polylactic acid-amino acid solution.

Further, the preparation method of the oxidized dextran solution in the step (2) comprises the following steps: dissolving dextran in phosphate buffer solution with pH of 4.5 and mass of 1.5 times of dextran, adding potassium periodate with mass of 1.3 times of dextran, stirring at room temperature 1500r/min for 15min, placing in dialysis bag with cut-off molecular weight of 1800, and dialyzing at 4 deg.C for 2 days with water as medium to obtain oxidized dextran solution.

Example 2

The negative ion fabric mainly comprises the following components in parts by weight: 20 parts of cotton poplin fabric, 30 parts of polyhexamethylene diacid finishing liquid and 45 parts of microencapsulated nano titanium dioxide negative ion treatment liquid.

The preparation method of the negative ion fabric mainly comprises the following preparation steps:

(1) adding 3-hexenedioic acid and deionized water with the mass of 3-hexenedioic acid being 3 times that of the 3-hexenedioic acid into a four-neck flask, heating to 60 ℃, mixing a sodium persulfate solution with the mass fraction of 20% and a sodium bisulfite solution with the mass fraction of 2% and the mass fraction of 30 times that of the sodium persulfate solution to obtain an initiating solution, dripping the initiating solution with the mass of 0.01 time that of the 3-hexenedioic acid into the four-neck flask at 60 drops/min, preserving heat for 2 hours after finishing dripping, and then heating to 80 ℃ and preserving heat for 1 hour to obtain a polyethylene diacid finishing liquid;

(2) at room temperature, dissolving tetrabutyl titanate in absolute ethyl alcohol with the mass of 2.8 times of that of tetrabutyl titanate, stirring for 20min on a magnetic stirrer at the rotating speed of 800r/min, adding an inhibitor glacial acetic acid with the mass of 1.2 times of that of tetrabutyl titanate, and continuously stirring for 20min at the rotating speed of 1000r/min to prepare a solution A; in addition, anhydrous ethanol with the mass of 1.4 times of that of tetrabutyl titanate and deionized water with the mass of 0.12 time of that of tetrabutyl titanate are uniformly mixed to prepare a solution B; stirring the solution A on a magnetic stirrer with the rotating speed of 1500r/min, dripping the solution B into the solution A at the titration speed of 40 drops/min, wherein the mass of the dripping solution B is 0.8 times of that of the solution A, and continuously stirring for 10min after dripping is finished to obtain nano titanium dioxide sol; mixing oxidized dextran solution and polylactic acid-amino acid solution with the mass of 3 times that of the oxidized dextran solution, adding dimethyl sulfoxide with the mass of 30 times that of the oxidized dextran solution and nano titanium dioxide sol with the mass of 1.0 time that of the oxidized dextran solution, stirring at the rotating speed of 1500r/min for 30min, and dialyzing at the temperature of 4 ℃ for 4h by taking water as a medium to obtain untreated microencapsulated nano titanium dioxide sol; mixing untreated microencapsulated nano titanium dioxide sol and sodium borohydride solution with the mass fraction of 1 percent, which is 10 times of the mass of the untreated microencapsulated nano titanium dioxide sol, for reaction to obtain pretreated microencapsulated nano titanium dioxide sol; mixing the pretreated microencapsulated nano titanium dioxide sol with epichlorohydrin which is 10 times of the mass of the pretreated microencapsulated nano titanium dioxide sol, stirring at the rotating speed of 1500r/min for 30min, then adding sodium hydroxide solution which is 15 times of the mass of the pretreated microencapsulated nano titanium dioxide sol and has the mass fraction of 20%, and continuously stirring for 60min to obtain microencapsulated nano titanium dioxide negative ion treatment solution;

(3) soaking the cotton poplin fabric in 1.5 times of the mass of the cotton poplin fabric in the polyvinyl diacid finishing liquid obtained in the step (1), continuously drying for 2 hours at the temperature of 80 ℃ after a two-dipping two-rolling process with the padding temperature of 25 ℃ and the rolling residue rate of 75 percent, and finally obtaining the finished cotton poplin fabric;

(4) soaking the cotton poplin fabric finished in the step (3) in the microencapsulated nano titanium dioxide negative ion treatment solution obtained in the step (2) with the mass 2.25 times that of the cotton poplin fabric for 3min, pre-drying at 80 ℃ for 1h, then baking at 120 ℃ for 3min, then washing the baked fabric with water, and finally drying at 80 ℃ for 1h to obtain the finished product negative ion fabric.

Further, the dialysis bag used in the dialysis in the step (2) is a dialysis bag with the molecular weight cut-off of 1500.

Further, the preparation method of the polylactic acid-amino acid solution in the step (2) comprises the following steps: mixing lactic acid, L-lysine with a mass of 0.12 time of that of the lactic acid and polyethylene glycol with a mass of 0.06 time of that of the lactic acid, stirring at a rotating speed of 800r/min for 3h, adding a catalyst stannous chloride with a mass of 0.007 time of that of the lactic acid, controlling the temperature at 110 ℃ and the stirring rotating speed at 1200r/min, and stirring for 10h to obtain the polylactic acid-amino acid solution.

Further, the preparation method of the oxidized dextran solution in the step (2) comprises the following steps: dissolving dextran in phosphate buffer solution with pH of 4.5 and mass of 1.5 times of dextran, adding potassium periodate with mass of 1.3 times of dextran, stirring at room temperature 1500r/min for 15min, placing in dialysis bag with cut-off molecular weight of 1800, and dialyzing at 4 deg.C for 2 days with water as medium to obtain oxidized dextran solution.

Example 3

The negative ion fabric mainly comprises the following components in parts by weight: 20 parts of cotton poplin fabric, 30 parts of modified polyhexamethylene diacid finishing liquid and 45 parts of nano titanium dioxide anion treating liquid.

The preparation method of the negative ion fabric mainly comprises the following preparation steps:

(1) adding 3-hexenedioic acid and deionized water with the mass 3 times that of the 3-hexenedioic acid into a four-neck flask, heating to 60 ℃, mixing a sodium persulfate solution with the mass fraction of 20% and a sodium bisulfite solution with the mass fraction of 2% and the mass fraction of 30 times that of the sodium persulfate solution to obtain an initiating solution, dripping the initiating solution with the mass 0.01 time that of the 3-hexenedioic acid and 4-decenoic acid glycidyl ester with the mass 0.05 time that of the 3-hexenedioic acid into the four-neck flask at a rate of 60 drops/min, preserving heat for 2h after finishing dripping, and then heating to 80 ℃ and preserving heat for 1h to obtain a modified polyethylene diacid finishing liquid;

(2) at room temperature, dissolving tetrabutyl titanate in absolute ethyl alcohol with the mass of 2.8 times of that of tetrabutyl titanate, stirring for 20min on a magnetic stirrer at the rotating speed of 800r/min, adding an inhibitor glacial acetic acid with the mass of 1.2 times of that of tetrabutyl titanate, and continuously stirring for 20min at the rotating speed of 1000r/min to prepare a solution A; in addition, anhydrous ethanol with the mass of 1.4 times of that of tetrabutyl titanate and deionized water with the mass of 0.12 time of that of tetrabutyl titanate are uniformly mixed to prepare a solution B; placing the solution A on a magnetic stirrer with the rotating speed of 1500r/min for stirring, dropwise adding the solution B into the solution A at the titration speed of 40 drops/min, wherein the mass of the dropwise added solution B is 0.8 times of that of the solution A, and continuously stirring for 10min after the dropwise addition is finished to obtain nano titanium dioxide negative ion treatment solution;

(3) soaking the cotton poplin fabric in a two-dipping two-rolling process with the padding temperature of 25 ℃ and the rolling residue rate of 75% in the modified polyethylene diacid finishing liquid obtained in the step (1) with the mass of 1.5 times of that of the cotton poplin fabric, and then continuously drying for 2 hours at the temperature of 80 ℃ to finally obtain the finished cotton poplin fabric;

(4) soaking the cotton poplin fabric finished in the step (3) in the nano titanium dioxide negative ion treatment liquid obtained in the step (2) with the mass 2.25 times that of the cotton poplin fabric for 3min, pre-drying at 80 ℃ for 1h, baking at 120 ℃ for 3min, washing the baked fabric with water, and finally drying at 80 ℃ for 1h to obtain the finished product negative ion fabric.

Comparative example

The negative ion fabric mainly comprises the following components in parts by weight: 20 parts of cotton poplin fabric, 30 parts of polyhexamethylene diacid finishing liquid and 45 parts of nano titanium dioxide negative ion treatment liquid.

The preparation method of the negative ion fabric mainly comprises the following preparation steps:

(1) adding 3-hexenedioic acid and deionized water with the mass of 3-hexenedioic acid being 3 times that of the 3-hexenedioic acid into a four-neck flask, heating to 60 ℃, mixing a sodium persulfate solution with the mass fraction of 20% and a sodium bisulfite solution with the mass fraction of 2% and the mass fraction of 30 times that of the sodium persulfate solution to obtain an initiating solution, dripping the initiating solution with the mass of 0.01 time that of the 3-hexenedioic acid into the four-neck flask at 60 drops/min, preserving heat for 2 hours after finishing dripping, and then heating to 80 ℃ and preserving heat for 1 hour to obtain a polyethylene diacid finishing liquid;

(2) at room temperature, dissolving tetrabutyl titanate in absolute ethyl alcohol with the mass of 2.8 times of that of tetrabutyl titanate, stirring for 20min on a magnetic stirrer at the rotating speed of 800r/min, adding an inhibitor glacial acetic acid with the mass of 1.2 times of that of tetrabutyl titanate, and continuously stirring for 20min at the rotating speed of 1000r/min to prepare a solution A; in addition, anhydrous ethanol with the mass of 1.4 times of that of tetrabutyl titanate and deionized water with the mass of 0.12 time of that of tetrabutyl titanate are uniformly mixed to prepare a solution B; placing the solution A on a magnetic stirrer with the rotating speed of 1500r/min for stirring, dropwise adding the solution B into the solution A at the titration speed of 40 drops/min, wherein the mass of the dropwise added solution B is 0.8 times of that of the solution A, and continuously stirring for 10min after the dropwise addition is finished to obtain nano titanium dioxide negative ion treatment solution;

(3) soaking the cotton poplin fabric in 1.5 times of the mass of the cotton poplin fabric in the polyvinyl diacid finishing liquid obtained in the step (1), continuously drying for 2 hours at the temperature of 80 ℃ after a two-dipping two-rolling process with the padding temperature of 25 ℃ and the rolling residue rate of 75 percent, and finally obtaining the finished cotton poplin fabric;

(4) soaking the cotton poplin fabric finished in the step (3) in the nano titanium dioxide negative ion treatment liquid obtained in the step (2) with the mass 2.25 times that of the cotton poplin fabric for 3min, pre-drying at 80 ℃ for 1h, baking at 120 ℃ for 3min, washing the baked fabric with water, and finally drying at 80 ℃ for 1h to obtain the finished product negative ion fabric.

Examples of effects

Table 1 below gives the results of the water resistance and wrinkle resistance analysis of the negative ion fabrics using examples 1 to 3 of the present invention and the comparative example.

TABLE 1

Compared with the experimental data of the comparative example 1 in the table, the modified polyhexamethylene diacid finishing liquid obtained by modifying polyhexamethylene diacid by using 4-decenoic acid glycidyl ester in the negative ion fabric and the microencapsulated nano titanium dioxide treating liquid obtained by wrapping nano titanium dioxide by using oxidized glucan and polylactic acid-amino acid are found to be capable of effectively improving the water washing resistance and the anti-wrinkle performance of the negative ion fabric; from the comparison of the experimental data of the embodiment 1 and the embodiment 2, it can be found that when 4-decenoic acid glycidyl ester is lacked in the polymerization process of polyhexamethylene acid to modify the polyhexamethylene acid, 4-decenoic acid ester double bonds in the 4-decenoic acid glycidyl ester and covalent bond crosslinking of epoxy groups and fiber macromolecules are lacked in the subsequent fabric finishing process, so that the crease resistance of the fabric is reduced, and the stable chemical bonds between the finished fabric and microencapsulated nano titanium dioxide are lacked, so that the water washing resistance of the fabric is reduced; from the comparison of the experimental data of example 1 and example 3, it can be seen that the nano titanium dioxide is easy to agglomerate and can not be firmly attached to the fabric without the wrapping of oxidized dextran and polylactic acid-amino acid, so that the water washing resistance of the fabric is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.