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Elastic conductive composite fiber and preparation method thereof

A composite fiber, elastic and conductive technology, which is applied in fiber processing, fiber type, textile and paper making, etc., can solve the problems of ordinary fibers losing mechanical properties, conductive coatings are easy to fall off, and easy to damage fiber structures, etc., to achieve the preparation process and equipment The effect of simple and easy operation, long-lasting conductivity, and wide application potential

Inactive Publication Date: 2011-07-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the post-treatment is easy to damage the fiber structure, and the conductive coating is easy to fall off during washing and friction, and it will also cause the ordinary fiber to lose its original good mechanical properties, making it difficult to further weave into fabrics, especially its low electrical conductivity limits its scope of application

Method used

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  • Elastic conductive composite fiber and preparation method thereof
  • Elastic conductive composite fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] After deoiling the commercialized polyurethane fiber, take it out and dry it; pretreat the carbon black (particle size 50nm), and configure the carbon black / tetrahydrofuran dispersion, in which the carbon black accounts for 10wt%, and the treatment agent is 5wt%, the treatment agent is 0.01wt% hydrochloric acid solution, ultrasonic for 30 minutes to make it uniformly dispersed. Immerse the polyurethane fiber in the carbon black / tetrahydrofuran dispersion, the temperature is controlled at 20°C; ultrasonically act for 10s, the frequency is 35kHz, the power is 50W, take it out, wash it with deionized water, dry it to remove the treatment agent and solvent, and obtain the composite conductive fiber, the cortex The weight ratio to the core layer is 10:90. The conductivity of this composite fiber is 10 -7 W -1 cm -1 , The elongation at break is 1500%.

Embodiment 2

[0025] After the commercial polyurethane fiber is deoiled, it is taken out and dried; the graphite (particle size 50nm) is pretreated, and the graphite / dimethylformamide dispersion is prepared, and the graphite accounts for 10wt%. 5wt%, the treatment agent is 1wt% hydrochloric acid solution, ultrasonic 30 minutes to make it uniformly dispersed. Immerse the polyurethane fiber in the graphite / dimethylformamide dispersion, control the temperature at 40°C, apply ultrasonic for 500s, frequency 53kHz, power 250W, take it out, wash it with deionized water, dry it to remove the treatment agent and solvent, and obtain a composite conductive Fiber, skin to core weight ratio is 10:90. The conductivity of this composite fiber is 10 -2 W -1 cm -1 , The elongation at break is 1500%.

Embodiment 3

[0027] After the commercial polyurethane fiber is deoiled, it is taken out and dried; the graphene (particle size 100nm) is pretreated, and the graphene / dimethylacetamide dispersion is prepared, and the share of graphene is 10wt%. , the treating agent is 5wt%, and the treating agent is 0.01wt% hydrochloric acid solution, which is ultrasonically dispersed for 30 minutes to make it uniformly dispersed. Immerse the treated polyurethane fibers in the graphene / dimethylacetamide dispersion, the temperature is controlled at 40°C; ultrasonication is applied for 10s, the frequency is 35kHz, and the power is 100W. Take it out, wash it with deionized water, and dry it to remove the treatment agent and solvent , to obtain a composite conductive fiber, the weight ratio of the skin layer to the core layer is 10:90, and the conductivity of the composite fiber is 10 -3 W -1 cm -1 , The elongation at break is 1500%.

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Abstract

The invention relates to an elastic conductive composite fiber and a preparation method thereof. The elastic conductive composite fiber comprises a core layer and a skin layer and is characterized in that: the skin layer consists of conductive particles, and the core layer is made of elastic polymer fibers. The preparation method comprises the following steps of: preparing conductive particle pretreatment solution from 10 to 90 weight percent of conductive particles, 5 to 20 weight percent of treatment agent and the balance of solvent; and soaking the elastic polymer fibers into the conductive particle pretreatment solution, performing ultrasonic treatment for 10 to 500 seconds, taking out the elastic polymer fibers, and cleaning and drying the elastic polymer fibers to prepare the elastic conductive composite fiber. The conductive fiber with high-elasticity mechanical property, electric conductivity and weaving property is obtained with simple steps and low cost. Besides traditional antistatic property and electromagnetic shielding function, the novel polyurethane composite conductive fiber and the fabric have good application prospect on the aspects of gas and liquid sensing, temperature sensing and the like.

Description

technical field [0001] The invention relates to an elastic conductive composite fiber and a preparation method thereof, belonging to the technical field of functional fibers. Background technique [0002] Conductive fiber is a new fiber variety that appeared in the 1960s, usually with a conductivity greater than 10 -8 W -1 cm -1 (20°C, 65% RH) fibers are defined as conductive fibers. Since DuPont of the United States successfully prepared composite conductive fibers with carbon black as the conductive core layer by composite spinning technology in 1974, conductive fibers have been widely used in antistatic textiles, explosion-proof and electromagnetic shielding. It has great potential applications in gas and liquid sensing elements and devices used in the monitoring of toxic and harmful gases and liquids, air pollution, industrial waste gas and waste water. The effective conductive channel in the polymer conductive fiber material can respond quickly and reversibly unde...

Claims

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Application Information

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IPC IPC(8): D06M11/74D06M11/83D06M101/38
Inventor 秦宗益范青青武永涛张晓琳蔡雅萌
Owner DONGHUA UNIV
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