阅读说明：本技术 一种羊毛织物防毡缩处理方法 (Anti-felting treatment method for wool fabric ) 是由 高晓红 方婧 孙静 蔡小斌 于 2019-10-28 设计创作，主要内容包括：本发明属于羊毛织物染整加工技术领域,公开了一种羊毛织物防毡缩处理的方法,包括：(1)将氧化石墨烯放入水中,超声分散均匀后,用醋酸溶液和醋酸钠溶液调节pH值至3～8,得到氧化石墨烯分散液；(2)将羊毛织物置于渗透剂JFC的35-40℃左右的温水中浸泡15-30min,使羊毛织物吸湿溶胀；(3)将吸湿溶胀后的羊毛织物挤干,浸入氧化石墨烯分散液中,50-100℃温度下处理60-120min,在羊毛织物的内部和表面形成还原氧化石墨烯；(4)将处理后的羊毛织物冷却至室温后,水洗,烘干。本发明处理方法操作工艺简单,制备过程绿色环保,处理后的羊毛织物不仅毡缩率下降,而且织物更加顺滑柔软,断裂强力保留率有所提升。(The invention belongs to the technical field of dyeing and finishing of wool fabrics, and discloses a method for felt-shrink prevention treatment of wool fabrics, which comprises the following steps: (1) putting graphene oxide into water, ultrasonically dispersing uniformly, and adjusting the pH value to 3-8 by using an acetic acid solution and a sodium acetate solution to obtain a graphene oxide dispersion liquid; (2) soaking the wool fabric in warm water of 35-40 ℃ of penetrating agent JFC for 15-30min to ensure that the wool fabric absorbs moisture and swells; (3) squeezing the wool fabric after moisture absorption and swelling, immersing the wool fabric into graphene oxide dispersion liquid, and treating the wool fabric for 60-120min at the temperature of 50-100 ℃ to form reduced graphene oxide inside and on the surface of the wool fabric; (4) and cooling the treated wool fabric to room temperature, washing with water, and drying. The treatment method disclosed by the invention is simple in operation process, the preparation process is green and environment-friendly, the felt shrinkage of the treated wool fabric is reduced, the fabric is smoother and softer, and the breaking strength retention rate is improved.)

1. The anti-felting treatment method of the wool fabric is characterized by comprising the following steps:

s1, placing graphene oxide into water, uniformly dispersing by using ultrasonic waves, and adjusting the pH value to 3-8 by using a pH regulator to obtain a graphene oxide dispersion liquid;

s2, placing the wool fabric into an aqueous solution of a penetrating agent for swelling treatment, squeezing out the wool fabric, and then soaking the wool fabric into the graphene oxide dispersion liquid for reduction reaction to obtain the wool fabric combined with reduced graphene oxide, wherein the soaking temperature is 50-100 ℃, and the soaking time is 60-120 min;

and S3, cooling the wool fabric combined with the reduced graphene oxide to room temperature, washing with water, and drying.

2. The method for felt proofing of wool fabric according to claim 1, wherein the time of ultrasonic dispersion in step S1 is 30-90 min.

3. The method of claim 1, wherein the pH adjusting agent is a mixed solution of an acetic acid solution and a sodium acetate solution in step S1.

4. The method of claim 1, wherein the concentration of the aqueous solution of the penetrant in step S2 is 1-2 mg/L.

5. The method of claim 1, wherein the swelling temperature in step S2 is 35-40 ℃ and the swelling time is 15-30 min.

6. The method of claim 1, wherein the cooling in step S3 is natural cooling.

7. The method of claim 1, wherein the drying temperature in step S4 is 60-80 ℃, and the drying time is 30-60 min.

Technical Field

The invention belongs to the technical field of dyeing and finishing of wool fabrics, and particularly relates to a wool fabric anti-felting treatment method.

Background

The wool is mainly composed of a scale layer coated outside the fiber, a cortex layer forming a main part of a wool entity, a medullary layer which is positioned in the center of the fiber and is opaque due to air and a cell membrane complex. The wool scale layer accounts for about 10% of the total weight of wool and is composed of a scale surface layer, a scale outer layer and a scale inner layer. The wool scale layer contains a large number of disulfide bonds, has a compact structure, can protect the inner layer tissues of the wool, and resists the erosion of external machinery, chemistry and the like. The scale layer structure of wool enables the wool fabric to be easily felted due to the fact that the wool fabric is free of directional external force during washing, so that softness and elasticity of the wool fabric are poor, dimensional stability is affected, and appearance and wearability of the wool fabric are seriously affected.

The method for the anti-felting treatment of wool includes a subtractive anti-felting treatment mainly aiming at removing scale layers and an additive anti-felting treatment for coating water-soluble polyurethane and organic silicon high molecular resin on wool fabrics. The subtraction treatment aims at reducing and destroying the scale layer to achieve the shrink-proof purpose, on one hand, the phosphorus removal degree is difficult to control, and on the other hand, the strength of the wool fabric is easy to damage. The addition treatment is to deposit the polymer on the surface of the wool fiber, coat the scale layer of the wool fiber and bond the fiber and the fiber, thereby achieving the purpose of shrink prevention. The protease can act on fibers such as wool, silk and the like, can catalyze peptide bond hydrolysis, and is considered to be the most potential method for replacing a chlorination felting prevention process for wool, but when the protease is used for treating the wool, because the common protease has poor degradation capability on keratin of wool scales, effective degradation of wool scale layers is difficult to cause, the felting change of the wool is not large, and the protease felting prevention process also has the defects of high cost, complex steps, uneven treatment and the like, and is not suitable for being widely used industrially.

Disclosure of Invention

In view of the above, the present invention provides a method for anti-felting wool fabric, which comprises treating a wool fabric with graphene oxide to combine the graphene oxide with wool, and reducing the graphene oxide to reduced graphene oxide in situ by using tyrosine residues of the wool to obtain a wool fabric with anti-felting property and softer and smoother hand feeling.

In order to solve the technical problems, the invention provides a wool fabric anti-felting treatment method, which comprises the following steps:

s1, placing graphene oxide into water, uniformly dispersing by using ultrasonic waves, and adjusting the pH value to 3-8 by using a pH regulator to obtain a graphene oxide dispersion liquid;

s2, placing the wool fabric into an aqueous solution of a penetrating agent for swelling treatment, squeezing out the wool fabric, and then soaking the wool fabric into the graphene oxide dispersion liquid for reduction reaction to obtain the wool fabric combined with reduced graphene oxide, wherein the soaking temperature is 50-100 ℃, and the soaking time is 60-120 min;

and S3, cooling the wool fabric combined with the reduced graphene oxide to room temperature, washing with water, and drying.

Graphene is the thinnest material in the world, having a thickness of only a single layer of atoms, about 0.335 nm. In graphene, each carbon atom is connected with other 3 carbon atoms through a strong sigma bond (the strongest chemical bond in nature), and the strong carbon-carbon bonds enable graphene sheets to have excellent mechanical properties, the Young modulus of the graphene is 1.031-1.058TPa, the breaking strength is as high as 130-180Gpa, and the graphene is one of the materials with the highest strength found in the world at present. However, the graphene has few active groups on the surface, so that the application of the graphene in the textile printing and dyeing industry is limited to a certain extent. Compared with Graphene, the Graphene Oxide (abbreviated as GO) prepared by a chemical oxidation method has a large number of-OH, -COOH and other hydrophilic groups on the surface, shows good reactivity, has excellent chemical modifiability, and is easy to form a composite material with other materials, but the conjugated structure of GO is damaged, so that the mechanical property of GO is reduced, and the potential application of GO in many fields is limited. Compared with Graphene and GO, reduced Graphene Oxide (abbreviated as rGO) prepared by a chemical reduction method retains a part of active groups, recovers the mechanical properties, has a better anti-felting treatment effect on wool fabrics, and does not influence the breaking strength of the wool fabrics.

Preferably, the ultrasonic dispersion time in the step S1 is 30-90 min.

Preferably, the pH adjusting agent in step S1 is a mixed solution of an acetic acid solution and a sodium acetate solution.

Preferably, the concentration of the aqueous solution of the penetrating agent in the step S2 is 1-2 mg/L.

Preferably, the temperature of the swelling treatment in the step S2 is 35-40 ℃, and the time of the swelling treatment is 15-30 min.

Preferably, the cooling in step S3 is natural cooling.

Preferably, the drying temperature in the step S4 is 60-80 ℃, and the drying time is 30-60 min.

Compared with the prior art, the wool fabric anti-felting treatment method provided by the invention comprises the steps of soaking the wool fabric in an aqueous solution containing a penetrating agent to absorb moisture and swell so as to enlarge gaps in fibers of the wool fabric, then squeezing the wool fabric to dry, and then soaking the wool fabric in a graphene oxide dispersion liquid, wherein graphene oxide enters the wool fabric through the gaps in the fibers of the wool fabric and is attached to the surface of the wool fabric, tyrosine residues in the fibers of the wool fabric reduce the graphene oxide which is combined in the wool fabric and attached to the surface of the wool fabric into reduced graphene oxide in situ, and the reduced graphene oxide is uniformly distributed in the wool fabric and on the surface of the wool due to the domain-limiting effect of pores of the wool, so that the self-compounding of a reduced graphene oxide sheet layer is effectively prevented. After natural cooling treatment, the pores of the fibers shrink, and the water-insoluble reduced graphene oxide is fixed under mechanical constraint and can not be transferred out, so that the water-insoluble reduced graphene oxide can be well fixed in the fibers and on the surfaces of the fibers. The wool fabric treated by the treatment method is softer and smoother in hand feeling, the breaking strength is not reduced but improved, a reducing agent and a fixing agent are not required to be added, and the preparation method is simple, green, environment-friendly and low in cost, and is suitable for industrial popularization and application.

Drawings

FIG. 1 is a 3000 SEM photograph of a wool fabric before treatment provided in example 1 of the present invention;

FIG. 2 is a 3000 SEM photograph of a wool fabric treated according to example 1 of the present invention;

FIG. 3 is a 5000 SEM photograph of a wool fabric treated according to example 1 of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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.

The invention provides a wool fabric anti-felting treatment method, which comprises the following steps:

s1, placing graphene oxide into water, uniformly dispersing by using ultrasonic waves, and adjusting the pH value to 3-8 by using a pH regulator to obtain a graphene oxide dispersion liquid;

s2, placing the wool fabric into an aqueous solution of a penetrating agent for swelling treatment, squeezing out, then soaking in graphene oxide dispersion liquid for reduction reaction to obtain the wool fabric combined with reduced graphene oxide, wherein the soaking temperature is 50-100 ℃, and the soaking time is 60-120 min;

and S3, cooling the wool fabric combined with the reduced graphene oxide to room temperature, washing with water, and drying.

Specifically, the graphene oxide is firstly put into water and ultrasonically dispersed until the graphene oxide is uniform, and the ultrasonic dispersion time is preferably 30-90 min, and more preferably 90 min. And then, adjusting the pH value to 5-8 by using a pH regulator to obtain the graphene oxide dispersion liquid. In the present invention, the pH adjusting agent is preferably a mixed solution of an acetic acid solution and a sodium acetate solution.

And then, soaking the wool fabric in the prepared water solution of the penetrating agent for swelling treatment, wherein the penetrating agent is preferably the penetrating agent JFC, and the structure of the penetrating agent is fatty alcohol-polyoxyethylene ether. The concentration of the aqueous solution of the penetrant is preferably 1-2 mg/L, and more preferably 1 mg/L. The temperature of the swelling treatment is preferably 35 to 40 ℃, more preferably 40 ℃, and the time of the swelling treatment is preferably 15 to 30min, more preferably 30 min.

And after swelling treatment, squeezing the wool fabric, soaking in the prepared graphene oxide dispersion liquid at the temperature of 50-100 ℃ for 60-120min to ensure that the graphene oxide fully enters the fiber of the wool fabric and is attached to the surface of the wool fabric, combining the graphene oxide entering the fiber of the wool fabric and attached to the surface of the wool fabric with tyrosine residues of the wool fabric, and reducing the graphene oxide in situ to form reduced graphene oxide combined with the wool fabric fiber to obtain the wool fabric combined with the reduced graphene oxide. In the process, the tyrosine residue of the wool fabric has weak reducibility, can be combined with the graphene oxide for in-situ reduction, does not need to add a reducing agent, and avoids the problems of uneven treatment and the like caused by the addition of the reducing agent.

And finally, cooling the wool fabric combined with the reduced graphene oxide to room temperature, preferably naturally cooling to room temperature, so that the pores of the wool fibers in the wool fabric are slowly shrunk, the reduced graphene oxide which is insoluble in water is fixed by mechanical constraint and can not be transferred out, and the reduced graphene oxide can be well fixed in the interior and on the surface of the fibers. And after cooling, washing with water to remove unreacted graphene oxide or reduced graphene oxide floating on the surface and having weak adhesion, and then drying, wherein the drying temperature is preferably 60-80 ℃, and the drying time is preferably 30-60 min.

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

In the following examples, all materials and fabrics are commercially available. The properties of the wool fabrics treated in the examples were determined as follows:

warp (weft) direction breaking strength: in the tensile test performed under the predetermined conditions, the maximum tensile force at the time of stretch breaking in the warp (weft) direction of the fabric, and the retention (%) of the warp (weft) direction breaking strength were determined as the treated warp (weft) direction breaking strength/untreated wool fabric warp (weft) direction breaking strength × 100%.

Felt shrinkage: when the fabric is in a wet state, the fabric is repeatedly squeezed and kneaded, fibers are mutually wound and felted, gaps among the fibers become small and gradually become tight, the felt shrinkage is often expressed by the area shrinkage percentage, and the area felt shrinkage (%) (area before washing-area after washing)/area before washing multiplied by 100%.