Shape memory fiber and its prepn process

A memory fiber and memory technology, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, single-component synthetic polymer rayon, etc., can solve problems such as poor interface bonding, inaccurate shape memory temperature, and weak deformation recovery. Achieve significant social and economic benefits, good shape memory characteristics, and increase the effect of varieties

Inactive Publication Date: 2005-12-14
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acquisition of the shape memory fiber fundamentally overcomes the defects of complex process, poor interface bondi

Method used

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  • Shape memory fiber and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Add 0.02 kg of dibutyltin laurate, 60 kg of polycaprolactone diol (number-average molecular weight 3000), 6.96 kg of 2,4-toluene diisocyanate, and 400 kg of dimethylformamide into 1000L of reversible phase components with In a reactor with a stirrer, a thermometer and a reflux condenser, react at a temperature of 70-80° C. for 2 hours. Then lower the temperature to 50-55°C, add 5.4 kg of stationary phase components 1,4-butanediol, 0.1 kg of trimethylolpropane, 20 kg of 4,4'-diphenylmethane diisocyanate and dimethylol propane 1.34 kg, temperature control 55-60 ℃, after 3-4 hours of reaction, add 131 kg of acetone to adjust the viscosity, and obtain colorless to light yellow, viscous polyurethane.

[0064] Through theoretical calculation, the -NCO:-OH=1:1.27 of the polyurethane obtained in this example; the mass percentage of the stationary phase is 37.1%, and the mass percentage of the reversible phase is 62.9%; its mass percentage is 15%; the crystallization melting po...

Embodiment 2

[0067]0.01 gram of stannous octoate, 24 grams of polycaprolactone diol (number average relative molecular mass 4000), 6 grams of polyethylene adipate glycol (number average relative molecular mass 1000), 6 grams of hexamethylene diol Add 5.0 g of isocyanate and 100 g of dimethylacetamide into a 250 mL reaction flask equipped with a stirrer, a thermometer and a reflux condenser, and react at a temperature of 65-70° C. for 2 hours. Then cool down to 55-60°C, add 1.0 grams of 1,4-butanediol, 1.0 grams of diethylene glycol, 2.0 grams of castor oil, 11.96 grams of 4,4'-diphenylmethane diisocyanate and dimethylol 1.48 g of butyl carboxylate, temperature controlled at 60-65° C., after 3 hours of reaction, 57 g of methyl ethyl ketone was added to adjust the viscosity to obtain light yellow, viscous polyurethane.

[0068] Through theoretical calculation, the -NCO:-OH=1.5:1.0 of the polyurethane obtained in this example; the mass percentage of the stationary phase is 50.0%, and the mass...

Embodiment 3

[0072] 0.02 kilogram of trimethylene diamine, polybutylene adipate diol (number-average molecular mass 4000) 85 kilograms, polyethylene glycol (number-average molecular mass 600) 15 kilograms, isophorone two Add 10.45 kg of isocyanate and 375 kg of dimethyl sulfoxide into a 1000L reactor equipped with a stirrer, thermometer and reflux condenser, and react at a temperature of 78-80°C for 2-3 hours. Then lower the temperature to 55-60°C, add 2.36 grams of 1,6-hexanediol, 1.125 kg of glycerol, 10.21 kg of 4,4'-diphenylmethane diisocyanate and 1.5 kg of tartaric acid, and control the temperature at 60-65°C. After 3 hours, the temperature was lowered to 30-40°C, and a colorless, viscous polyurethane was obtained.

[0073] Through theoretical calculation, the -NCO:-OH=1.0:1.0 of the polyurethane obtained in this example; the mass percentage of the stationary phase is 20.0%, and the mass percentage of the reversible phase is 80.0%; its mass percentage is 25%; the crystallization mel...

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Abstract

The present invention relates to one kind of shape memory fiber prepared with shape memory polyurethane and its preparation process. The shape memory polyurethane is prepared with reversible phase component (A) and fixed phase component (B). The preparation process of the shape memory fiber includes the following steps: preparing polyurethane with the component (A) and the component (B); and wet spinning the prepared polyurethane to prepare shape memory fiber. The shape memory fiber the present invention provides has the following features: titer higher than 300 dtex, breaking strength of 1-1.5 CN/dtex, breaking elongation of 100-400 %, deformation fixing rate not lower than 90 %, deformation recovering rate not lower than 90 %, deformation recovering temperature range of the reversible phase from -10 deg.c to +60 deg.c, and phase conversion temperature higher than 100 deg.c.

Description

technical field [0001] The invention relates to a shape memory fiber and a preparation method thereof, in particular to a shape memory fiber made from shape memory polyurethane and a preparation method of the fiber. Background technique [0002] Shape memory materials are currently in the initial research stage, and a small number of basic research and review articles have been published at home and abroad, proposing various uses in the fields of textiles, biomedical materials, packaging materials, and industrial sealing materials. The main uses in the textile field include (1) Functional coating and functional finishing of fabrics to obtain waterproof and breathable fabrics, such as sportswear, military combat uniforms, mountaineering suits, tents, etc. (2) Use the shape memory function of polyurethane to adjust the appropriate memory trigger temperature for clothing interlining (cuffs, necklines, etc.), so that it has good anti-wrinkle and wear-resistant properties. It ca...

Claims

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Application Information

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IPC IPC(8): D01F6/94
Inventor 胡金莲范浩军叶光斗刘岩杨国荣
Owner THE HONG KONG POLYTECHNIC UNIV
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