Antistatic bamboo charcoal fiber and preparation method thereof

Abstract

The invention discloses an antistatic bamboo charcoal fiber and a preparation method thereof. The invention comprises the following steps: firstly preparing porous titanium dioxide, then modifying the porous titanium dioxide with a vinyl silane coupling agent, introducing double bonds into the titanium dioxide, and then grafting polyacrylamide and sodium polystyrene sulfonate onto the surface and interior of the titanium dioxide through a double bond addition reaction to obtain a titanium dioxide composite material. Subsequently, under the action of a crosslinking agent, epichlorohydrin, active groups in the titanium dioxide composite material react with amino groups on pretreated bamboo charcoal fibers, and the titanium dioxide composite material is grafted onto the pretreated bamboo charcoal fibers to form a strong bond, thereby imparting durable antistatic performance to the bamboo charcoal fibers. Simultaneously, polar groups in the polyacrylamide and sodium polystyrene sulfonate absorb moisture to form a conductive layer, further reducing the surface resistance of the bamboo charcoal fibers, promoting the dissipation of static charges, and significantly improving the antistatic capability of the bamboo charcoal fibers.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical fibers, and in particular to antistatic bamboo charcoal fiber and a preparation method thereof. Background Art

[0002] Bamboo charcoal fiber is made from moso bamboo through a new calcination process and new technology using pure oxygen, high temperature, and nitrogen barrier delay. Its unique fiber structure design has the characteristics of moisture absorption and breathability, antibacterial and antibacterial, warm in winter and cool in summer, and green and environmentally friendly. Bamboo charcoal fiber fabrics are mainly used in underwear products, jeans, shirts, T-shirts, socks, towels, bedding and sports and leisure wear, etc., in order to give full play to the excellent characteristics of bamboo charcoal fiber, which is natural, environmentally friendly and multifunctional. Bamboo charcoal fiber provides a brand-new raw material for the development of textile products.

[0003] When bamboo charcoal fiber is subjected to friction during processing and use, the electric charge generated is not easy to dissipate, and the electric charge will accumulate on the fiber surface, which will not only affect the processing and weaving of the fiber, but also affect its wearing experience. In order to prevent the generation of static charge on the surface of the fiber material, adding an antistatic agent is an effective method. Chinese patent document CN201610483317.4 discloses an antistatic modified PBT fiber, which is made of the following components by mass: 45-50 parts of terephthalic acid, 34-43 parts of butanediol, 0.5-1 part of catalyst, 8-12 parts of modified graphene, 3-8 parts of nanometal compound, and 1010 parts of antioxidant. 0.1-0.5 parts of stabilizer and 0.3-0.8 parts of stabilizer. Although the antistatic properties of the prepared fiber have been improved to a certain extent, further improvement is still needed; Chinese patent document CN201610741096.6 uses dimethyl terephthalate, ethylene glycol, polyethylene glycol and cyclohexane butyrate zinc as raw materials to synthesize an antistatic agent, which is used on polyester fiber to give it an antistatic effect, but the ingredients contained in this antistatic agent are relatively traditional, which is greatly affected by the environment and has a poor antistatic effect. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an antistatic bamboo charcoal fiber and a preparation method thereof, so as to solve the technical problem that the existing bamboo charcoal fiber has poor antistatic effect.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for preparing antistatic bamboo charcoal fiber comprises the following steps:

[0007] (1) treating bamboo charcoal fibers with ammonia plasma to obtain pretreated bamboo charcoal fibers;

[0008] (2) The pretreated bamboo charcoal fiber is immersed in deionized water, and then titanium dioxide composite material and epichlorohydrin are added, heated and stirred to react. After the reaction is completed, the antistatic bamboo charcoal fiber is obtained by washing and drying.

[0009] Preferably, in step (1), the ammonia plasma treatment power is 90-120 W, and the treatment time is 60-120 s.

[0010] Preferably, in step (2), the preparation method of the titanium dioxide composite material is as follows:

[0011] S1. Add butyl titanate to an ethanol aqueous solution, then add polyvinyl pyrrolidone, stir evenly, adjust the pH of the solution to 3-4, continue stirring for 2-3 hours, let stand to obtain a gel, and then heat treat the gel at 500-550° C. to obtain porous titanium dioxide;

[0012] S2, dispersing porous titanium dioxide in an ethanol aqueous solution, then adding a vinyl silane coupling agent thereto, stirring to react, and after the reaction is completed, filtering, washing, and drying to obtain modified titanium dioxide;

[0013] S3. Disperse the modified titanium dioxide in deionized water, add acrylamide and sodium styrene sulfonate, adjust the pH of the solution to 9-12, then add sodium persulfate, and reflux in a nitrogen atmosphere at 70-80°C for 6-8h. After the reaction is completed, filter, wash, and dry to obtain a titanium dioxide composite material.

[0014] Preferably, in step S1, the mass ratio of butyl titanate, ethanol aqueous solution and polyvinyl pyrrolidone is 5:15-25:1-1.5.

[0015] Preferably, in step S2, the mass ratio of porous titanium dioxide, ethanol aqueous solution and vinyl silane coupling agent is 4-6:100:1-2.

[0016] Preferably, in step S2, the stirring reaction temperature is 40-60° C., and the stirring reaction time is 2-4 h.

[0017] Preferably, in step S3, the mass ratio of modified titanium dioxide, acrylamide, sodium styrene sulfonate and sodium persulfate is 8-15:2-3:4-6:0.8-1.2.

[0018] Preferably, in step (2), the mass ratio of the pretreated bamboo charcoal fiber, the titanium dioxide composite material and epichlorohydrin is 10-20:3-6:2-4.

[0019] Preferably, in step (2), the heating and stirring reaction temperature is 50-70° C., and the heating and stirring time is 4-6 h.

[0020] The present invention also provides antistatic bamboo charcoal fiber prepared by the above preparation method.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention first prepares porous titanium dioxide, then uses a vinyl silane coupling agent to modify the porous titanium dioxide, introduces double bonds into the titanium dioxide, and then grafts polyacrylamide and sodium polystyrene sulfonate on the surface and inside of the titanium dioxide through a double bond addition reaction to obtain a titanium dioxide composite material. Then, under the action of a cross-linking agent, epichlorohydrin, the active groups in the titanium dioxide composite material react with the amino groups on the pretreated bamboo charcoal fiber, and the titanium dioxide composite material is grafted onto the pretreated bamboo charcoal fiber to form a strong bond, thereby giving the bamboo charcoal fiber a long-lasting antistatic property.

[0023] (2) Titanium dioxide adheres to the surface of bamboo charcoal fiber to form a conductive path. At the same time, the polar groups in polyacrylamide and sodium polystyrene sulfonate absorb moisture to form a conductive layer, which further reduces the surface resistance of bamboo charcoal fiber, promotes the dissipation of static charge, and significantly improves the antistatic ability of bamboo charcoal fiber. In addition, polyacrylamide is introduced into titanium dioxide. Polyacrylamide contains a large number of polar group amino groups, which are conducive to grafting reaction with pretreated bamboo charcoal fiber. At the same time, the introduction of amino groups improves the flame retardant properties of bamboo charcoal fiber to a certain extent. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below through specific preferred embodiments, but the present invention is not limited to the following embodiments.

[0025] It should be noted that, unless otherwise specified, all chemical reagents involved in the present invention were purchased through commercial channels.

[0026] The bamboo charcoal fiber used in the present invention was purchased from Shaoxing Xineng Textile Technology Co., Ltd., with a thickness of 75D.

[0027] Example 1

[0028] A method for preparing antistatic bamboo charcoal fiber comprises the following steps:

[0029] (1) The bamboo charcoal fiber was treated with ammonia plasma at a treatment power of 90 W and a treatment time of 120 s to obtain pretreated bamboo charcoal fiber;

[0030] (2) 10 g of pretreated bamboo charcoal fiber was immersed in 250 g of deionized water, and then 3 g of titanium dioxide composite material and 2 g of epichlorohydrin were added, and heated and stirred at 50 ° C for 6 h. After the reaction was completed, the antistatic bamboo charcoal fiber was obtained by washing and drying;

[0031] The preparation method of the titanium dioxide composite material is as follows:

[0032] S1. Add 5 g of butyl titanate to 15 g of an 80 wt% ethanol aqueous solution, then add 1 g of polyvinyl pyrrolidone, stir evenly, adjust the pH of the solution to 3, continue stirring for 2 h, let stand to obtain a gel, and then heat-treat the gel at 500 ° C for 3 h to obtain porous titanium dioxide;

[0033] S2, dispersing 4 g of porous titanium dioxide in 100 g of 80 wt% ethanol aqueous solution, then adding 1 g of vinyltrimethoxysilane thereto, stirring and reacting at 40 ° C. for 4 h. After the reaction is completed, filtering, washing, and drying to obtain modified titanium dioxide;

[0034] S3. Disperse 8 g of modified titanium dioxide in 200 g of deionized water, add 2 g of acrylamide and 4 g of sodium styrene sulfonate, adjust the pH of the solution to 9, then add 0.8 g of sodium persulfate, and reflux under a nitrogen atmosphere at 70°C for 8 h. After the reaction is completed, filter, wash, and dry to obtain a titanium dioxide composite material.

[0035] Example 2

[0036] A method for preparing antistatic bamboo charcoal fiber comprises the following steps:

[0037] (1) The bamboo charcoal fiber was treated with ammonia plasma at a treatment power of 120 W and a treatment time of 60 s to obtain pretreated bamboo charcoal fiber;

[0038] (2) 20 g of pretreated bamboo charcoal fiber was immersed in 250 g of deionized water, and then 6 g of titanium dioxide composite material and 4 g of epichlorohydrin were added, and heated and stirred at 70 ° C for 4 h. After the reaction was completed, the antistatic bamboo charcoal fiber was obtained by washing and drying;

[0039] The preparation method of the titanium dioxide composite material is as follows:

[0040] S1. Add 5 g of butyl titanate to 25 g of an 80 wt% ethanol aqueous solution, then add 1.5 g of polyvinyl pyrrolidone, stir evenly, adjust the pH of the solution to 4, continue stirring for 3 h, let stand to obtain a gel, and then heat-treat the gel at 550° C. for 3 h to obtain porous titanium dioxide;

[0041] S2, dispersing 6 g of porous titanium dioxide in 100 g of 80 wt% ethanol aqueous solution, then adding 2 g of vinyltriisopropoxysilane thereto, stirring and reacting at 60 ° C for 2 h. After the reaction is completed, filtering, washing, and drying to obtain modified titanium dioxide;

[0042] S3. Disperse 15 g of modified titanium dioxide in 350 g of deionized water, add 3 g of acrylamide and 6 g of sodium styrene sulfonate, adjust the pH of the solution to 10, and then add 1.2 g of sodium persulfate. Reflux the mixture under a nitrogen atmosphere at 80°C for 6 h. After the reaction is completed, filter, wash, and dry to obtain a titanium dioxide composite material.

[0043] Example 3

[0044] A method for preparing antistatic bamboo charcoal fiber comprises the following steps:

[0045] (1) The bamboo charcoal fiber was treated with ammonia plasma at a treatment power of 120 W and a treatment time of 90 s to obtain pretreated bamboo charcoal fiber;

[0046] (2) 15 g of pretreated bamboo charcoal fiber was immersed in 250 g of deionized water, and then 5 g of titanium dioxide composite material and 4 g of epichlorohydrin were added, and heated and stirred at 60 ° C for 5 h. After the reaction was completed, the antistatic bamboo charcoal fiber was obtained by washing and drying;

[0047] The preparation method of the titanium dioxide composite material is as follows:

[0048] S1. Add 5 g of butyl titanate to 20 g of an 80 wt% ethanol aqueous solution, then add 1.2 g of polyvinyl pyrrolidone, stir evenly, adjust the pH of the solution to 4, continue stirring for 2 h, let stand to obtain a gel, and then heat-treat the gel at 500 ° C for 3 h to obtain porous titanium dioxide;

[0049] S2, dispersing 5 g of porous titanium dioxide in 100 g of 80 wt% ethanol aqueous solution, then adding 1.5 g of vinyltriethoxysilane thereto, stirring and reacting at 50 ° C. for 3 h. After the reaction is completed, filtering, washing, and drying to obtain modified titanium dioxide;

[0050] S3. Disperse 12 g of modified titanium dioxide in 350 g of deionized water, add 3 g of acrylamide and 4 g of sodium styrene sulfonate, adjust the pH of the solution to 12, and then add 1 g of sodium persulfate. Reflux the mixture under a nitrogen atmosphere at 70°C for 8 h. After the reaction is completed, filter, wash, and dry to obtain a titanium dioxide composite material.

[0051] Example 4

[0052] A method for preparing antistatic bamboo charcoal fiber comprises the following steps:

[0053] (1) The bamboo charcoal fiber was treated with ammonia plasma at a treatment power of 100 W and a treatment time of 90 s to obtain pretreated bamboo charcoal fiber;

[0054] (2) 12 g of pretreated bamboo charcoal fiber was immersed in 250 g of deionized water, and then 4 g of titanium dioxide composite material and 3 g of epichlorohydrin were added, and heated and stirred at 50 ° C for 6 h. After the reaction was completed, the antistatic bamboo charcoal fiber was obtained by washing and drying;

[0055] The preparation method of the titanium dioxide composite material is as follows:

[0056] S1. Add 5 g of butyl titanate to 25 g of an 80 wt% ethanol aqueous solution, then add 1.4 g of polyvinyl pyrrolidone, stir evenly, adjust the pH of the solution to 4, continue stirring for 3 h, let stand to obtain a gel, and then heat-treat the gel at 550° C. for 3 h to obtain porous titanium dioxide;

[0057] S2, dispersing 4 g of porous titanium dioxide in 100 g of 80 wt% ethanol aqueous solution, then adding 1.5 g of vinyltrimethoxysilane thereto, stirring and reacting at 60 ° C for 3 h. After the reaction is completed, filtering, washing, and drying to obtain modified titanium dioxide;

[0058] S3. Disperse 10 g of modified titanium dioxide in 350 g of deionized water, add 2 g of acrylamide and 5 g of sodium styrene sulfonate, adjust the pH of the solution to 10, and then add 0.9 g of sodium persulfate. Reflux the mixture under a nitrogen atmosphere at 75 ° C for 8 hours. After the reaction is completed, filter, wash and dry to obtain a titanium dioxide composite material.

[0059] Comparative Example 1

[0060] A method for preparing antistatic bamboo charcoal fiber comprises the following steps:

[0061] (1) The bamboo charcoal fiber was treated with ammonia plasma at a treatment power of 120 W and a treatment time of 90 s to obtain pretreated bamboo charcoal fiber;

[0062] (2) 15 g of pretreated bamboo charcoal fiber was immersed in 250 g of deionized water, and then 5 g of porous titanium dioxide and 4 g of epichlorohydrin were added, and heated and stirred at 60 ° C for 5 h. After the reaction was completed, the antistatic bamboo charcoal fiber was obtained by washing and drying;

[0063] The preparation method of porous titanium dioxide is as follows:

[0064] 5 g of butyl titanate was added to 20 g of 80 wt% ethanol aqueous solution, and then 1.2 g of polyvinyl pyrrolidone was added and stirred evenly. The pH of the solution was adjusted to 4 and stirred for 2 h. The solution was allowed to stand to obtain a gel, and the gel was then heat-treated at 500 ° C for 3 h to obtain porous titanium dioxide.

[0065] The fibers prepared in Examples 1-4 and Comparative Example 1 were woven into a fiber having a gram weight of 120 g / m 2 The antistatic performance test of the fabric was carried out in accordance with the standard GB / T 12703.2-2021 "Test method for electrostatic properties of textiles - Part 2: Charge surface density". The test results are shown in the following table:

[0066]

[0067] Finally, it should be noted that the above embodiments do not limit the present invention in any form. Those skilled in the art will appreciate that modifications and improvements can be made based on the present invention. Therefore, any modifications or improvements made without departing from the spirit of the present invention are intended to fall within the scope of protection claimed in the present invention.

Claims

1. A method for preparing antistatic bamboo charcoal fiber, characterized in that: The steps include: (1) treating bamboo charcoal fibers with ammonia plasma to obtain pretreated bamboo charcoal fibers; (2) Immersing the pretreated bamboo charcoal fiber in deionized water, then adding the titanium dioxide composite material and epichlorohydrin, heating and stirring to react, and after the reaction is completed, washing and drying to obtain the antistatic bamboo charcoal fiber; In step (2), the preparation method of the titanium dioxide composite material is as follows: S1. Add butyl titanate to an ethanol aqueous solution, then add polyvinyl pyrrolidone, stir evenly, adjust the pH of the solution to 3-4, continue stirring for 2-3 hours, let stand to obtain a gel, and then heat treat the gel at 500-550° C. to obtain porous titanium dioxide; S2, dispersing porous titanium dioxide in an ethanol aqueous solution, then adding a vinyl silane coupling agent thereto, stirring to react, and after the reaction is completed, filtering, washing, and drying to obtain modified titanium dioxide; S3. Disperse the modified titanium dioxide in deionized water, add acrylamide and sodium styrene sulfonate, adjust the pH of the solution to 9-12, then add sodium persulfate, and reflux in a nitrogen atmosphere at 70-80°C for 6-8h. After the reaction is completed, filter, wash, and dry to obtain a titanium dioxide composite material.

2. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step (1), the ammonia plasma treatment power is 90-120 W, and the treatment time is 60-120 s.

3. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step S1, the mass ratio of butyl titanate, ethanol aqueous solution and polyvinyl pyrrolidone is 5:15-25:1-1.

5.

4. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step S2, the mass ratio of porous titanium dioxide, ethanol aqueous solution and vinyl silane coupling agent is 4-6:100:1-2.

5. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step S2, the stirring reaction temperature is 40-60° C., and the stirring reaction time is 2-4 h.

6. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step S3, the mass ratio of modified titanium dioxide, acrylamide, sodium styrene sulfonate and sodium persulfate is 8-15:2-3:4-6:0.8-1.

2.

7. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step (2), the mass ratio of the pretreated bamboo charcoal fiber, the titanium dioxide composite material and epichlorohydrin is 10-20:3-6:2-4.

8. The method for preparing antistatic bamboo charcoal fiber according to claim 1, characterized in that: In step (2), the heating and stirring reaction temperature is 50-70°C, and the heating and stirring time is 4-6 hours.

9. The antistatic bamboo charcoal fiber prepared by the preparation method according to any one of claims 1 to 8.

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