阅读说明：本技术 一种抗菌大豆蛋白纤维面料及其染整加工工艺 (Antibacterial soybean protein fiber fabric and dyeing and finishing processing technology thereof ) 是由 不公告发明人 于 2020-04-26 设计创作，主要内容包括：本发明涉及一种抗菌大豆蛋白纤维面料及其染整加工工艺,包括漂白、染色及后整理步骤,所述染色步骤包括：S1、预处理：将大豆蛋白纤维置于温度为80～85℃的含有1～5g/L玉米朊/N-2羟丙基三甲基氯化铵壳聚糖复合颗粒的水溶液中振荡处理5～10min,加入碳酸氢钠,浸渍1～10min,取出,水洗至中性,晾干；S2、染色：对上述改性大豆蛋白纤维采用活性染料进行染色。本发明采用玉米朊/N-2羟丙基三甲基氯化铵壳聚糖复合颗粒对大豆纤维进行预处理,在不加入无机盐促染和低碱浓度固色的情况下,面料的上染料和固色率仍然略高于传统加盐染色工艺,且染色后的面料表现出较好的柔软度和光泽度。(The invention relates to an antibacterial soybean protein fiber fabric and a dyeing and finishing process thereof, which comprises the steps of bleaching, dyeing and post-finishing, wherein the dyeing step comprises the steps of S1, pretreatment, namely placing soybean protein fibers in an aqueous solution containing 1-5 g/L of zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles at the temperature of 80-85 ℃, carrying out oscillation treatment for 5-10 min, adding sodium bicarbonate, soaking for 1-10 min, taking out, washing with water to be neutral, and airing, and S2, dyeing, namely dyeing the modified soybean protein fibers by adopting a reactive dye.)

1. A dyeing and finishing processing technology for a soybean protein fiber fabric comprises the steps of bleaching, dyeing and after-finishing, and is characterized in that the dyeing step comprises the following steps:

s1, preprocessing, namely placing the soybean protein fiber into an aqueous solution containing 1-5 g/L of zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles at the temperature of 80-85 ℃ for oscillation processing for 5-10 min, adding sodium bicarbonate, soaking for 1-10 min, taking out, washing with water to be neutral, and airing;

s2, dyeing: and dyeing the modified soybean protein fiber by adopting reactive dye.

2. The process of claim 1, wherein the concentration of zein/N-2 hydroxypropyl trimethylammonium chloride chitosan composite particles in the aqueous solution is 3 g/L.

3. The process of claim 1, wherein the method for preparing the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles comprises the steps of:

dissolving zein in an ethanol solution of 80-90% (v/v), slowly dropwise adding the solution into an aqueous solution containing 1-5% of N-2 hydroxypropyl trimethyl ammonium chloride chitosan under the conditions of keeping the shearing speed of 300-500 rpm and the pH value of 3.0-4.0, fully stirring, removing ethanol, centrifuging, and freeze-drying supernatant to obtain the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles.

4. The process of claim 3, wherein the ratio of zein: dropping zein ethanol solution into aqueous solution containing 2-4% of N-2 hydroxypropyl trimethyl ammonium chloride chitosan according to the weight ratio of 30-55: 1 of N-2 hydroxypropyl trimethyl ammonium chloride chitosan.

5. The process of claim 4, wherein the weight ratio of zein to N-2 hydroxypropyl trimethyl ammonium chloride chitosan is 52: 1.

6. The process of claim 1, wherein the dyeing comprises the steps of adding the dye into a dye vat at room temperature, keeping the temperature for dyeing for 40-60 min at a bath ratio of 1: 40-50 and heating to 50-60 ℃ at a speed of 1-2 ℃/min, adding 1-3 g/L soda ash at a temperature of 65-80 ℃, fixing color for 10-30 min, cooling, washing with water, soaping at 80-90 ℃ for 10-20 min, washing at 50-60 ℃ for 5-10 min, and washing with cold water for 1-5 min.

7. The process of claim 1, wherein the bleaching process is selected from one of an oxygen bleaching process, a reduction bleaching process, and a combined oxygen bleaching-reduction bleaching process.

8. The process as claimed in claim 7, wherein the bleaching process is an oxygen bleaching-method, and the oxygen bleaching is carried out at 90-95 ℃ for 50-80 min in water containing 10-30 g/L% of 30% hydrogen peroxide, 1-3 g/L% of soda ash, 1-5 g/L% of sodium silicate and 21-2 g/L% of penetrant ECP.

9. The process as claimed in claim 1, wherein the post-finishing step comprises the steps of padding the soybean protein fibers in 3-6 g/L of water containing a softening agent and having a pH of 4-6 for 10-30 min at a temperature of 25-40 ℃, and then dehydrating, drying and shaping the padded soybean protein fibers.

10. The soybean protein fiber fabric prepared by the process of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of textiles, in particular to an antibacterial soybean protein fiber fabric and a dyeing and finishing processing process thereof.

Background

The soybean protein fiber is a regenerated large white fiber prepared by the acetalization reaction of a solution which is prepared by blending soybean protein and polyvinyl alcohol according to a certain proportion through wet spinning. The soybean protein fiber has the characteristics of fine monofilament fineness, light specific gravity, high strength and elongation, soft luster, good moisture absorption and moisture conductivity, comfortable wearing, soft hand feeling and the like. However, the soybean protein fiber generally shows the problems of poor deep dyeing property and leveling property, low color fastness, hard hand feeling and the like in the dyeing process.

In order to solve these problems, soybean fibers are dyed with reactive dyes to obtain high fixation rate and fixation efficiency, but a large amount of inorganic salt must be added in the process. Another effective way is to modify the fiber by cationization, such as Lvjing, Wang and Sun Changming, by pretreating the soybean fiber with chitosan which is degraded by oxidation as a cationic modifier, the dyeing effect of the reactive dye can be improved without reducing the dyeing fastness^[1]However, inorganic salt is still required to be added in the dyeing process to promote the dyeing. Meanwhile, the scholars also research the influence of chitosan derivatives (HTCC) and NMA-HTCC on the dyeing performance of soybean fiber, and find that the NMA-HTCC has stronger dyeing promotion effect, inorganic salt is not required to be added in the dyeing process, compared with the traditional dyeing process, the K/S value of the dye on the surface of the fabric is obviously improved, and the color fastness to washing of the fabric is equivalent to that of the traditional dyeing process, which proves that the soybean fiber modified by the NMA-HTCC can realize salt-free dyeing^[2]. However, the surface of the fiber modified by NMA-HTCC is rough, the original luster of the soybean protein fiber is reduced, the fiber is sensitive to the consumption of soda ash, and the darkening and color fixing can be realized only by the need of higher-concentration alkali. Therefore, it is necessary to develop a dyeing and finishing process which has no salt and low alkali dyeing process, good darkening effect and color fixing effect, and does not sacrifice the advantages of soybean fibers.

The zein molecular structure contains obvious hydrophilic area and hydrophobic area, and has unique self-assembly property, film forming property and gel property, so that the zein molecular structure is applied to the preparation of drug delivery carrier systems and edible materials. However, there is no report that the soybean fiber is modified by cationic modification by using the soybean fiber as a cationic modifier, wherein the soybean fiber is compounded with chitosan N-2 hydroxypropyl trimethyl ammonium chloride to form particles.

Compared with chitosan, N-2 hydroxypropyl trimethyl ammonium chloride chitosan has higher solubility, electropositivity and easy adhesion on the surface of biological mucosa, is generally used as a drug controlled release carrier at present, and has no report of compounding the chitosan with zein to form particles and performing cationization modification on soybean fibers as a cation modifier at present.

Reference documents:

[1] the application of Lvjing, Wangchong, Sun Chang Ming, oxidative degradation of chitosan in soybean fiber dyeing [ J ] the development of textile technology, 2013(01):31-34+40.

[2] Influence of Lvjing spring, Dumei, Rongchuxia, Zhouqing Chitosan derivative on the Properties of Soybean protein composite fiber [ J ]. knitting industry, 2015(05):47-51.

Disclosure of Invention

Based on the above, the invention aims to provide a process which has the characteristics of no salt and low alkali and is suitable for dyeing soybean fibers.

In order to achieve the purpose, the invention adopts the following technical scheme: a dyeing and finishing processing technology for a soybean protein fiber fabric comprises the steps of bleaching, dyeing and after-finishing, wherein the dyeing step comprises the following steps:

s1, modifying soybean fibrin, namely putting the soybean fibrin into an aqueous solution containing 1-5 g/L of zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles at the temperature of 80-85 ℃, oscillating for 5-10 min, adding sodium bicarbonate, soaking for 1-10 min, taking out, washing with water to be neutral, and airing;

s2, dyeing: and dyeing the modified soybean protein fiber by adopting reactive dye.

Further, the concentration of the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles in the aqueous solution is 3 g/L.

Further, the preparation method of the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particle comprises the following steps:

dissolving zein in an ethanol solution of 80-90% (v/v), slowly dropwise adding the solution into an aqueous solution containing 1-5% of N-2 hydroxypropyl trimethyl ammonium chloride chitosan under the conditions of keeping the shearing speed of 300-500 rpm and the pH value of 3.0-4.0, fully stirring, removing ethanol, centrifuging, and freeze-drying supernatant to obtain the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles.

Further, the protein ratio of zein: dropping zein ethanol solution into aqueous solution containing 2-4% of N-2 hydroxypropyl trimethyl ammonium chloride chitosan according to the weight ratio of 30-55: 1 of N-2 hydroxypropyl trimethyl ammonium chloride chitosan.

Further, the weight ratio of the zein to the N-2 hydroxypropyl trimethyl ammonium chloride chitosan is 52: 1.

The dyeing method comprises the following specific steps of adding the well-melted dye into a dye vat at room temperature, heating to 50-60 ℃ at a bath ratio of 1: 40-50 at a speed of 1-2 ℃/min, carrying out heat preservation dyeing for 40-60 min, adding 1-3 g/L sodium carbonate at a temperature of 65-80 ℃, fixing color for 10-30 min, cooling, washing with water, carrying out soap boiling at a temperature of 80-90 ℃ for 10-20 min, washing with water at a temperature of 50-60 ℃ for 5-10 min, and washing with cold water for 1-5 min.

Further, the bleaching process is selected from one of an oxygen bleaching method, a reduction bleaching method and an oxygen bleaching-reduction bleaching combined method.

Further, the bleaching process is an oxygen bleaching-method, wherein the oxygen bleaching is carried out for 50-80 min in water containing 30% hydrogen peroxide 10-30 g/L, soda ash 1-3 g/L, sodium silicate 1-5 g/L and a penetrating agent ECP-21-2 g/L at the temperature of 90-95 ℃.

Further, the post-finishing step comprises the steps of padding the soybean protein fibers in 3-6 g/L of water containing a softening agent and having a pH value of 4-6 for 10-30 min at a temperature of 25-40 ℃, and then dehydrating, drying and shaping the padded fibers to obtain the soybean protein fiber.

The invention also aims to provide the soybean protein fiber fabric prepared by the process.

Therefore, the invention has the following beneficial effects:

1) the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles are prepared by an anti-solvent precipitation method, and the composite particles have strong electropositivity, can form ionic bonds with anions in a dye, promote the combination of the dye and fibers, and are beneficial to the fixation of the dye on the surfaces of the fibers. After the modified soybean fiber is used as a cationic modifier to modify soybean fibers, a good darkening effect is shown without adding inorganic salt in a dyeing stage; and in the color fixing stage, a higher color fixing rate can be obtained under the condition of lower alkali concentration, the color fixing process is insensitive to the using amount of soda ash, and the dye uptake and the color fixing rate are slightly higher than those of the traditional salt-adding dyeing process.

2) The fabric obtained by dyeing the modified soybean protein fiber by adopting the zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles provided by the invention is soft in hand feeling, and more importantly, the luster of the fabric is not reduced.

3) Antibacterial tests prove that the modified zein/N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles show excellent antibacterial performance and have good inhibition effects on staphylococcus aureus, escherichia coli and the like.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments of examples. It should not be understood that the scope of the above-described subject matter of the present invention is limited to the following examples.