Textile fabric with good antibacterial and shape retention

Abstract

The present application relates to a kind of good antibacterial shape retention textile fabric.The textile fabric is spun from modified cotton fiber and auxiliary fiber;The modified cotton fiber is obtained by two-step modification of surface coating modification and surface quaternization modification, the surface coating modification realizes the grafting of hyperbranched polyether chain segment and siloxane chain segment on the surface of cotton fiber by chemical bond chain, the toughening characteristics of hyperbranched polyether chain segment is used to improve the toughness of cotton fiber, improve the appearance flatness of the obtained fabric, while overcome the characteristics of fabric prone to damp due to the introduction of hyperbranched polyether, finally after surface quaternization modification, quaternary ammonium salt structure is introduced into hyperbranched polyester chain segment, and then antibacterial properties are given to cotton fiber;Therefore, the textile fabric obtained by the present application has good antibacterial properties and wash fastness.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of textile fabrics, and particularly relates to a textile fabric with good antibacterial and shape-retaining properties. BACKGROUND

[0002] With the improvement of the quality of life, the consumer population constantly diversifies the pursuit of fabrics. After the basic requirement of wearing comfortable and breathable fabrics, the antibacterial property and shape retention after washing are also required. It is known that the fabric made of cotton fiber or hemp fiber is mostly woven, and the composition of the fabric is a natural polymer, which is easy to become a natural nutrient for bacteria, and the antibacterial property is poor, and the shape retention after washing is poor.

[0003] Based on this, the application provides an antibacterial and shape-retaining textile fabric made of cotton fiber. SUMMARY

[0004] The application aims to provide an antibacterial and shape-retaining textile fabric.

[0005] The application aims to solve the problems of poor antibacterial property and shape retention of the existing textile fabric made of cotton fiber.

[0006] The application can be achieved by the following technical scheme:

[0007] An antibacterial and shape-retaining textile fabric is made of modified cotton fiber and auxiliary fiber.

[0008] Further, the auxiliary fiber is one or any combination of common chemical fibers in the fabric field, such as polyester fiber, spandex fiber, polypropylene fiber, and acrylic fiber.

[0009] Further, the mass ratio of the modified cotton fiber and the auxiliary fiber is 3-6:0-1.

[0010] Further, the modified cotton fiber is made by the following steps:

[0011] Firstly, the activated cotton fiber is placed in a mixed solution and incubated at 50-60 DEG C for 1-2h, then vacuum is extracted and boron trifluoride ether is slowly added, after the addition is completed, incubation and stirring are carried out for 12-24h, the cotton fiber is taken out, washed and dried to obtain coated cotton fiber, wherein the mass ratio of the activated cotton fiber and the mixed solution is 1g:20-40mL, the mixed solution is composed of functional monomer and tetrahydrofuran in a mass ratio of 3-6g:20-40mL, and the added mass of the boron trifluoride ether is 1-5% of the mass of the functional monomer;

[0012] In the preparation process of the modified cotton fiber, first, the reaction between the epoxy group on the surface of the activated cotton fiber and the hydroxyl group in the functional monomer is utilized to graft the functional monomer on the surface of the activated cotton fiber, and then the self-condensation ring-opening polymerization reaction between the oxygen heterocycle in the functional monomer grafted on the surface of the cotton fiber and the hydroxyl group in the functional monomer in the solution occurs under the catalysis of boron trifluoride ether to generate hyperbranched polyether containing siloxane structure, and then the coated cotton fiber is obtained. It can be known that the surface of the coated cotton fiber is chemically linked with hyperbranched polyether chain segments and siloxane chain segments.

[0013] In the second step, the coated cotton fiber is placed in tetrahydrofuran with a pH of 10-11, and glycidyltrimethylammonium chloride aqueous solution is slowly added dropwise under stirring at 55-65℃. After the dropwise addition is completed, the reaction is continued for 1-2h under stirring, the reaction is stopped, the cotton fiber is taken out, washed and dried to obtain the modified cotton fiber. The amount ratio of the coated cotton fiber, tetrahydrofuran and glycidyltrimethylammonium chloride is 10g:40-80mL:0.3-0.6g, and the mass fraction of the glycidyltrimethylammonium chloride aqueous solution is 75%.

[0014] In the above reaction, the reaction between the hydroxyl group in the hyperbranched polyether chain segment grafted on the surface of the coated cotton fiber and the epoxy group in the glycidyltrimethylammonium chloride is utilized to obtain the modified cotton fiber, so that the quaternary ammonium salt structure is grafted on the surface of the cotton fiber, and the antibacterial property is given.

[0015] Further, the activated cotton fiber is obtained by alkali washing and epoxidation of cotton fiber,

[0016] Further, the alkali washing is specifically operated as follows:

[0017] The cotton fiber is placed in sodium hydroxide solution, and after being placed at room temperature for 2-5h, the cotton fiber is taken out and washed until the washing liquid is neutral to obtain the alkali washed cotton fiber.

[0018] Further, the solid-liquid ratio of the cotton fiber to the sodium hydroxide solution is 1g:15-30mL.

[0019] Further, the mass fraction of the sodium hydroxide solution is 10-20%.

[0020] Further, the epoxidation is specifically operated as follows:

[0021] The alkali washed cotton fiber is placed in an epichlorohydrin solution, and reacted at 55-60℃ and pH 10-11 for 5-8h. The alkali washed cotton fiber is taken out and washed until the washing liquid is neutral to obtain the activated cotton fiber.

[0022] In the above epoxidation reaction, the hydroxyl group on the surface of the etherified fiber reacts with the chlorine in the epichlorohydrin, and then the ring is opened and closed to graft the epoxy group onto the surface of the caustic washed cotton fiber.

[0023] Further, the epichlorohydrin solution is composed of epichlorohydrin and anhydrous ethanol mixed at 5-10 g:10-15 mL.

[0024] Further, the solid-liquid ratio of the caustic washed cotton fiber to the epichlorohydrin is 1 g:15-30 mL.

[0025] Further, the functional monomer is prepared by the following steps:

[0026] After the diethyl carbonate and the functionalized triol are uniformly mixed, potassium carbonate is added, heated to 100-115℃, and kept for 8-12 h. In the reaction process, the byproduct ethanol is continuously distilled out. Then, the temperature is increased to 160-170℃ for 6-8 h to remove carbon dioxide. The reaction is stopped, and then acetone is used for precipitation. The system of ethanol / acetone is used for repeated dissolution and precipitation. Finally, drying is performed to obtain the functional monomer. In the reaction for removing carbon dioxide, the generated carbon dioxide and residual ethanol are pumped out with water. The molar ratio of the diethyl carbonate, the functionalized triol, and the potassium carbonate is 1:1.3-1.5:0.03-0.05.

[0027] In the above reaction, the diethyl carbonate and the functionalized triol undergo ester exchange reaction (diester group and two hydroxyl groups in the functionalized triol undergo ester exchange reaction) under the catalysis of sodium hydroxide to obtain an intermediate product containing a diethyl carbonate ring (the specific molecular structure is shown in formula (1)). Then, the intermediate product containing the diethyl carbonate ring is heated to 160-170℃ to remove carbon dioxide to generate a functional monomer containing a four-membered oxygen-containing heterocyclic ring (the specific molecular structure is shown in formula (2)).

[0028]

[0029]

[0030] Further, the functionalized triol is obtained by the ring-opening reaction of the epoxy group of the trimethylol aminomethyl methane and the epoxy silane coupling agent. The epoxy silane coupling agent is KH560.

[0031] Further, the reaction conditions of the ring-opening reaction of the epoxy group are as follows: pH value is 10-11, temperature is 45-55℃, and reaction time is 1-2 h.

[0032] Further, the molar ratio of the trimethylol aminomethyl methane to the epoxy silane coupling agent is 1:0.9-1.

[0033] Preferably, the functionalized triol is prepared by the following steps:

[0034] Slowly drop the epoxy silane coupling agent into the trimethylol aminomethane solution, adjust the pH value of the solution to 10-11 by sodium hydroxide, stir the reaction at a reaction temperature of 45-55 DEG C for 1-2h, add hydrochloric acid to make the solution neutral, stop the reaction, add acetone to precipitate, take the precipitate, redissolve the precipitate, dry, and obtain the functionalized triol, wherein the trimethylol aminomethane solution is composed of trimethylol aminomethane and tetrahydrofuran according to a mixing amount ratio of 1-3g:20mL, and the molar ratio of the trimethylol aminomethane to the epoxy silane coupling agent is 1:0.9-1.

[0035] The beneficial effects of the present application are:

[0036] To solve the problems in the background art, the present application adopts surface modification on cotton fibers to obtain modified fibers, the surface modification is carried out by two-step method of surface coating modification and surface quaternization modification, the surface coating modification realizes grafting of hyperbranched polyether chain segments and siloxane chain segments on the surface of cotton fibers by chemical bond chain, the toughness of cotton fibers is improved by using the toughening property of hyperbranched polyether chain segments, the easy-wrinkling and poor shape-retention of the textile fabric made of the cotton fibers are improved, the appearance flatness of the obtained fabric is improved, meanwhile, considering the easy water absorption of the obtained hyperbranched polyether chain segments in air, a waterproof layer is formed on the surface layer of the cotton fibers by using the low surface energy property of the siloxane chain segments, thus the moisture absorption property of the fabric caused by the introduction of hyperbranched polyether is overcome, finally, the surface quaternization modification is carried out to introduce quaternary ammonium salt structure into the hyperbranched polyester chain segments, thus the antibacterial property of the cotton fibers is endowed.

[0037] In summary, the textile fabric obtained by the present application has good antibacterial property and washing flatness. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below by combining with the embodiments of the present application, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0039] Embodiment 1

[0040] Preparation of functionalized triol:

[0041] To 200 mL solution containing 0.1 mol of Tris, slowly drop 0.9 mol of epoxy silane coupling agent, adjust the pH of the solution to 10-11 with sodium hydroxide, at a reaction temperature of 45 °C, stirring for 2 h, add hydrochloric acid to adjust the solution to neutral, stop the reaction, add acetone to precipitate, take the precipitate and redissolve the precipitate, dry, to obtain functionalized triol.

[0042] Example 2

[0043] Preparation of functionalized monomer:

[0044] To 120 mL solution containing 0.1 mol of Tris, slowly drop 1 mol of epoxy silane coupling agent, adjust the pH of the solution to 10-11 with sodium hydroxide, at a reaction temperature of 55 °C, stirring for 1 h, add hydrochloric acid to adjust the solution to neutral, stop the reaction, add acetone to precipitate, take the precipitate and redissolve the precipitate, dry, to obtain functionalized triol.

[0045] Example 3

[0046] The activated cotton fiber is obtained by alkali washing and epoxidation of cotton fiber, which is a conventional fiber surface treatment method. This embodiment only exemplifies a relatively optimized alkali washing and epoxidation treatment step operation scheme, which is as follows:

[0047] A1, place the cotton fiber in a sodium hydroxide solution, and place it at room temperature for 2-5 h, then take out the cotton fiber, wash until the washing liquid is neutral, to obtain alkali washed cotton fiber; the solid-liquid ratio of the cotton fiber to the sodium hydroxide solution is 1 g:15 mL; the mass fraction of the sodium hydroxide solution is 180%.

[0048] A2, place the alkali washed cotton fiber in an epichlorohydrin solution, react at 60 °C, pH 10-11 for 5-8 h, take out the alkali washed cotton fiber, wash until the washing liquid is neutral, to obtain the activated cotton fiber; the epichlorohydrin solution is composed of epichlorohydrin and anhydrous ethanol according to 5 g:15 mL; the solid-liquid ratio of the alkali washed cotton fiber to the epichlorohydrin is 1 g:15 mL.

[0049] Example 4

[0050] Preparation of functionalized monomer:

[0051] The functionalized triol prepared in Example 2 and 0.1 mol of diethyl carbonate were mixed uniformly, 0.05 mol of potassium carbonate was added, heated to 115°C, and reacted for 8 h. During the reaction, the byproduct ethanol was continuously distilled off. Then the temperature was raised to 170°C for carbon dioxide removal reaction for 6 h. After the reaction was stopped, the product was precipitated with acetone, and then redissolved and precipitated with an ethanol / acetone system. Finally, the product was dried to obtain the functionalized monomer. During the carbon dioxide removal reaction, the generated carbon dioxide and residual ethanol were pumped out with a water pump.

[0052] Example 5

[0053] Preparation of functionalized monomer

[0054] The functionalized triol prepared in Example 2 and 0.1 mol of diethyl carbonate were mixed uniformly, 0.05 mol of potassium carbonate was added, heated to 115°C, and reacted for 8 h. During the reaction, the byproduct ethanol was continuously distilled off. Then the temperature was raised to 170°C for carbon dioxide removal reaction for 6 h. After the reaction was stopped, the product was precipitated with acetone, and then redissolved and precipitated with an ethanol / acetone system. Finally, the product was dried to obtain the functionalized monomer. During the carbon dioxide removal reaction, the generated carbon dioxide and residual ethanol were pumped out with a water pump.

[0055] Example 6

[0056] Preparation of modified cotton fiber

[0057] First step, 10 g of the activated cotton fiber prepared in Example 3 was placed in 200 mL of a mixed solution at 50°C for 2 h. Then 0.1 g of boron trifluoride ether was slowly added under vacuum. After the addition was completed, the stirring reaction was continued for 24 h. The cotton fiber was taken out, washed and dried to obtain the coated cotton fiber. The mixed solution was composed of the functionalized monomer prepared in Example 4 and tetrahydrofuran in a weight ratio of 3 g:20 mL.

[0058] Second step, 10 g of the coated cotton fiber was placed in 40 mL of tetrahydrofuran with a pH of 10-11 at 55°C. Under stirring, 0.3 g of glycidyltrimethylammonium chloride aqueous solution with a mass fraction of 75% was slowly added. After the addition was completed, the stirring reaction was continued for 2 h. The reaction was stopped, the cotton fiber was taken out, washed and dried to obtain the modified cotton fiber.

[0059] Example 7

[0060] Preparation of modified cotton fiber

[0061] The first step, 10 g of activated cotton fiber prepared in Example 3 was placed in 400 mL of mixed solution and reacted at 60°C for 1 h, then 0.5 g of boron trifluoride ether was slowly added dropwise under vacuum, after the dropwise addition was completed, the reaction was stirred and reacted for 12 h, the cotton fiber was taken out, washed and dried to obtain coated cotton fiber, wherein the mixed solution was composed of functional monomers prepared in Example 5 and tetrahydrofuran in a weight ratio of 6 g:40 mL;

[0062] The second step, 10 g of coated cotton fiber was placed in 80 mL of tetrahydrofuran with a pH of 10-11, and 0.6 g of glycidyltrimethylammonium chloride aqueous solution with a mass fraction of 75% was slowly added dropwise under stirring at 65°C, after the dropwise addition was completed, the reaction was continued for 1 h, the reaction was stopped, the cotton fiber was taken out, washed and dried to obtain modified cotton fiber.

[0063] Comparative Example 1

[0064] Preparation of modified cotton fiber:

[0065] 10 g of alkali washed cotton fiber was placed in 40 mL of tetrahydrofuran with a pH of 10-11, and 0.36 g of glycidyltrimethylammonium chloride aqueous solution with a mass fraction of 75% was slowly added dropwise under stirring at 55°C, after the dropwise addition was completed, the reaction was continued for 1 h, the reaction was stopped, the cotton fiber was taken out, washed and dried to obtain modified cotton fiber.

[0066] Comparative Example 2

[0067] Preparation of modified cotton fiber:

[0068] The first step, 10 g of activated cotton fiber prepared in Example 3 was placed in 200 mL of mixed solution and reacted at 50°C for 2 h, then 0.1 g of boron trifluoride ether was slowly added dropwise under vacuum, after the dropwise addition was completed, the reaction was stirred and reacted for 24 h, the cotton fiber was taken out, washed and dried to obtain coated cotton fiber, wherein the mixed solution was composed of trimethylolpropane and tetrahydrofuran in a weight ratio of 3 g:20 mL;

[0069] The second step, 10 g of coated cotton fiber was placed in 40 mL of tetrahydrofuran with a pH of 10-11, and 0.3 g of glycidyltrimethylammonium chloride aqueous solution with a mass fraction of 75% was slowly added dropwise under stirring at 55°C, after the dropwise addition was completed, the reaction was continued for 2 h, the reaction was stopped, the cotton fiber was taken out, washed and dried to obtain modified cotton fiber.

[0070] Example 8

[0071] A textile fabric with good antibacterial and shape retention properties was woven from the modified cotton fiber prepared in Example 6.

[0072] Example 9

[0073] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the modified cotton fiber prepared in Example 7.

[0074] Example 10

[0075] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the modified cotton fiber prepared in Example 6 and polyester fiber according to a mass ratio of 3:1.

[0076] Example 11

[0077] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the modified cotton fiber prepared in Example 6 and spandex fiber according to a mass ratio of 4:1.

[0078] Example 12

[0079] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the modified cotton fiber prepared in Example 6 and polypropylene fiber according to a mass ratio of 5:1.

[0080] Comparative Example 3

[0081] A textile fabric with good antibacterial and shape-retaining properties, which is woven from cotton fiber.

[0082] Comparative Example 4

[0083] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the modified cotton fiber prepared in Comparative Example 1.

[0084] Comparative Example 5

[0085] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the modified cotton fiber prepared in Comparative Example 2.

[0086] Comparative Example 6

[0087] A textile fabric with good antibacterial and shape-retaining properties, which is woven from the coated cotton fiber prepared in Example 6, Step 1.

[0088] The fabrics obtained in Examples 8-12 and Comparative Examples 2-5 were subjected to the following performance tests:

[0089] Dry crease recovery angle determination: The recovery angle of the finished fabric was determined according to the standard GB / T 3819-1997 "Determination of crease recovery of textile fabrics", and the warp and weft directions were each measured 5 times, and the average values were added, and the test results are shown in Table 1.

[0090] Wet crease recovery angle determination: The recovery angle of the finished fabric was determined according to the standard GB / T 3819-1997 "Determination of crease recovery of textile fabrics", and the warp and weft directions were each measured 5 times, and the average values were added, and the test results are shown in Table 1.

[0091] Smoothness test: the finished fabric is rinsed with clean water at room temperature, then hung up to dry in a ventilated place, and then compared with the smoothness grade plate of AATCC NO. 124 Three-dimensional Smoothness Appearance Replicas, and the test results are shown in Table 1;

[0092] Water absorption rate: a 10cm x 10cm textile fabric is weighed as m0, and then immersed in water for 5min, then the textile fabric is taken out without dripping water, weighed as m1, and the water absorption rate = (m1-m0) / m0, the test can be repeated 5 times, and the average value is taken;

[0093] Antibacterial property: FZ / T 73023-2006 Antibacterial Knitted Fabrics Appendix D.8 Antibacterial Fabric Test Method: Oscillation Method is used for testing, and the test bacteria are Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 6538 and Candida albicans ATCC 10231, and the test results are shown in Table 1;

[0094] Table 1

[0095]

[0096] From the data in Table 1, it can be seen that the fabric obtained from Examples 6-10 has excellent wrinkle resistance, smoothness and antibacterial property, and low water absorption rate.

[0097] In the description of the specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] The above is only an example and description of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as it does not deviate from the invention or exceed the scope defined by the present claims, and should belong to the protection scope of the present application.

Claims

1. A textile fabric having good antibacterial properties and good shape retention, characterized in that: The modified cotton fiber and the auxiliary fiber are woven together; The modified cotton fiber comprises the following steps: In the first step, the activated cotton fiber is put into a mixed solution and kept at 50-60℃ for 1-2h, then vacuumized and slowly added with boron trifluoride ether, after the addition is completed, kept stirring for 12-24h, then taken out, washed and dried to obtain the coated cotton fiber, wherein the mixed solution is composed of functional monomer and tetrahydrofuran in a ratio of 3-6g:20-40mL; In the second step, the coated cotton fiber is put into tetrahydrofuran with pH of 10-11, slowly added with glycidyltrimethylammonium chloride aqueous solution under stirring at 55-65℃, after the addition is completed, kept stirring for 1-2h, then taken out, washed and dried to obtain the modified cotton fiber. The functional monomer comprises the following steps: After the diethyl carbonate and the functional triol are mixed uniformly, potassium carbonate is added, heated to 100-115℃, kept for 8-12h, then heated to 160-170℃ for 6-8h to remove carbon dioxide, then treated to obtain the functional monomer. The functional triol is obtained by epoxy ring-opening reaction of trimethylol aminomethyl methane and epoxy silane coupling agent. The activated cotton fiber is obtained by alkali washing and epoxidation of cotton fiber.

2. The textile fabric according to claim 1, wherein: The mass ratio of the modified cotton fiber and the auxiliary fiber is 3-6:0-1.

3. The textile fabric according to claim 1, wherein the textile fabric has good anti-bacterial properties and good shape retention. The mass ratio of the activated cotton fiber and the mixed solution is 1g:20-40mL, and the added mass of the boron trifluoride ether is 1-5% of the mass of the functional monomer.

4. The anti-bacterial and good shape-retaining textile fabric according to claim 1, characterized in that: The mass ratio of the coated cotton fiber, tetrahydrofuran and glycidyltrimethylammonium chloride is 10g:40-80mL:0.3-0.6g.

5. The anti-bacterial and good shape-retaining textile fabric according to claim 1, characterized in that: The molar ratio of the diethyl carbonate, the functional triol and the potassium carbonate is 1:1.3-1.5:0.03-0.

05.

6. The anti-bacterial and good shape-retention textile fabric according to claim 1, characterized in that: The reaction conditions of the epoxy ring-opening reaction are as follows: pH value is 10-11, temperature is 45-55℃, and reaction time is 1-2h.

7. The anti-bacterial and good shape-retaining textile fabric according to claim 1, characterized in that: The molar ratio of the trimethylol aminomethyl methane and the epoxy silane coupling agent is 1:0.9-1.

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