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Process for preparing antibacterial polyacrylonitrile fiber

A technology of polyacrylonitrile fiber and acrylonitrile, applied in the direction of wet spinning, etc., can solve the problem of no bactericidal performance, and achieve the effect of strong antibacterial ability, long-lasting antibacterial performance and broad application prospects

Inactive Publication Date: 2006-07-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Polyacrylonitrile is an important fiber-forming polymer. It is widely used due to its high strength, heat resistance and good moth and mold resistance. There are fewer applications in fields such as medical and health fields

Method used

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  • Process for preparing antibacterial polyacrylonitrile fiber
  • Process for preparing antibacterial polyacrylonitrile fiber

Examples

Experimental program
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Effect test

example 1

[0027] In a 3-liter reactor equipped with mechanical stirring and temperature controller, add 0.784 kg of water and 0.816 kg of sodium thiocyanate in a certain proportion. After the dissolution is complete, add 315 g of acrylonitrile and 25 g of 3-allyl 5,5-dimethylcaprolactoin, 1.02 grams of isopropanol and 1.75 grams of azobisisobutyronitrile. After stirring evenly, the temperature was raised to 78° C. for 2 hours to react. Cool after the reaction, and remove unreacted acrylonitrile under reduced pressure. The measured solid content of the solution was 12.4%, and the mass percentage of the 3-allyl-5,5-dimethylcaprolactone component in the copolymer was 1.6%. After the obtained solution was left to defoam under vacuum and filtered, the spinning solution was obtained. The spinning solution is pressed into the coagulation bath through the spinneret, the coagulation bath is 10% sodium thiocyanate aqueous solution, and the temperature is 10°C. The spun silk pulling speed was 2...

example 2

[0030] In a 3-liter reactor equipped with mechanical stirring and temperature controller, 1.2 kilograms of water, 120 grams of acrylonitrile, 54.3 grams of 3-allyl-5,5-dimethylcaprolactin were added in a certain proportion, Then 2.45 grams of potassium persulfate was added. After stirring evenly, the temperature was raised to 72° C. to react for 2 hours. After the reaction, cool, filter and wash with water. The resulting white powder of the copolymer was vacuum-dried at 80 °C to constant weight. Get 0.10 kilogram of copolymer powder, 0.90 kilogram of industrial spinning grade polyacrylonitrile copolymer (91.2% of acrylonitrile content, 7.8% of methyl acrylate, 1.0% of sodium methacrylic sulfonate) 0.90 kilogram, after stirring, dissolve together in 7.33 kilogram In 51% sodium thiocyanate aqueous solution, the dissolution time is 6 hours and the temperature is 60°C. A solution with a solid content of 12.0% was obtained, and after defoaming and filtering, a spinning solution ...

example 3

[0033]Get 0.20 kg of copolymer powder prepared in Example 2, 0.80 kg of industrial spinning grade polyacrylonitrile copolymer (acrylonitrile content 91.2%, methyl acrylate 7.8%, sodium methacrylate sulfonate 1.0%), stir , were dissolved together in 7.33 kg of 51% sodium thiocyanate aqueous solution, the dissolution time was 6 hours, and the dissolution temperature was 60°C. The obtained solution has a solid content of 12.0%, and after defoaming and filtering, a spinning solution is obtained. The spinning solution is pressed into the coagulation bath through the spinneret, the coagulation bath is 10% sodium thiocyanate aqueous solution, and the temperature is 10°C. The spun silk pulling speed was 2.5 m / min. The as-spun fibers were preheated in water at 55°C and stretched 1.5 times. Then wash with desalted water at 50°C, and then heat-stretch in water at a temperature of 96-99.5°C, and the stretching ratio is 6 times. The total draw ratio of the fiber is 9 times. After the s...

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Abstract

The invention discloses an antibiotic polyacrylic fibre preparing method, which comprises the following steps: (1) dissolving 3-allyl group-5, 5-dimethyl hydantoin and acrylic nitrile in solvent (total integral mass concentration: 5%-50%); adding in initiating agent; joining chain transfer agent; proceeding free radical aggregation at the temperature of 40-78deg. c for 0. 5-10 hours; (2) dissolving copolymer in sodium sulfocyanate aqueous solution; getting spinning solution after vacuum defoamation at the temperature of 20-70deg C; (3) proceeding spinning with wet method; obtaining modified acrylics; (4) impregnating polyacrylic fibre in sodium hypochlorite or sodium hypobromite aqueous solution; sluicing out with water; getting antibiotic polyacrylic fibre. The prepared polyacrylic fibre has the features of strong, long-lasting, recoverable antibiosis ability.

Description

technical field [0001] The invention relates to a preparation method of chemical fibers, in particular to a preparation method of antibacterial polyacrylonitrile fibers, which belongs to the category of high molecular synthetic fibers. Background technique [0002] Recently, the threat to human life and health from microorganisms in nature has increased; with the progress of society, the development of industrial economy and the improvement of living standards, people pay more and more attention to personal hygiene and health. Fiber textile materials, as people's daily necessities, are increasingly valued. In this context, research on antibacterial fibers has developed rapidly. The preparation methods of antibacterial fibers can be divided into two basic methods: physical methods and chemical methods. The physical method refers to adding the antibacterial agent to the fiber, and the fiber matrix and the antibacterial agent interact and combine in a physical way. The implem...

Claims

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Application Information

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IPC IPC(8): D01F6/38D01D5/06C08F220/48C08F4/40
Inventor 王留阳顾利霞谢娟肖茹孙刚
Owner DONGHUA UNIV
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