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Preparation method of silicone rubber-based flexible and deformable electric-conducting and heating composite film

A silicone rubber and flexible-based technology, which is applied in the field of preparation of flexible polymer-based conductive heating films, can solve the problems of unstable conductive network and easy damage of conductive network, and achieve the effect of maintaining heating performance, improving conductivity and reducing dosage.

Inactive Publication Date: 2016-09-21
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the manufactured product has a certain degree of flexibility, the conductive network is unstable because it only uses carbon black as the conductor; under certain deformation, the conductive network is easily damaged

Method used

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  • Preparation method of silicone rubber-based flexible and deformable electric-conducting and heating composite film
  • Preparation method of silicone rubber-based flexible and deformable electric-conducting and heating composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1. Weigh 10 g of polydimethylsiloxane, add 1.5 g of carbon black with a diameter of 3 μm and 1.5 g of carbon fibers with a diameter of 5 μm and a length of 0.5 mm, and then ultrasonicate at room temperature for 30 minutes in an ultrasonic cell disruptor, wherein the ultrasonication is performed in batches , the regularity is ultrasound for 5 minutes, stop for 3 minutes. Then add 0.5g of cross-linking agent hydroxy silicone oil, mix evenly, pour into tetrafluoroethylene mold, and vacuumize for 20min to remove air bubbles, the vacuum degree is 0.06MPa, and then cross-link at 60°C for 2h to obtain flexible silicone rubber with mixed fillers conductor.

Embodiment 2

[0021] Example 2. Weigh 10 g of polydimethylsiloxane, add 1 g of carbon black with a diameter of 0.2 μm and 2 g of carbon fibers with a diameter of 8 μm and a length of 0.05 mm, and then perform ultrasonication at room temperature for 40 minutes in an ultrasonic cell disruptor, wherein the ultrasonication is performed in batches, The regularity is 5 minutes of ultrasound, 3 minutes off. Then add 0.05g of cross-linking agent Shuang25, mix well and pour into the tetrafluoroethylene mold, and at the same time vacuumize for 20min to remove air bubbles, the vacuum degree is 0.06MPa, and then cross-link at 60°C for 2h to obtain flexible silicone rubber with mixed fillers conductor.

Embodiment 3

[0022] Example 3 is the same as Example 2, except that 10 g of polydimethylsiloxane is weighed, and 2 g of stainless steel fibers with a diameter of 5 μm and a length of 0.05 mm are added instead of carbon fibers.

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Abstract

The invention relates to a preparation method of a silicone rubber-based flexible and deformable electric-conducting and heating composite film. The preparation method comprises the following steps: taking and adding silicone rubber into carbon black and carbon fibers or stainless steel fibers, and performing ultrasonic treatment and stirring simultaneously to obtain a uniformly-dispersed mixture solution; adding a cross-linking agent into the solution, performing uniform mixing, pouring the mixture into a tetrafluoroethylene mold, simultaneously performing vacuum-pumpin to remove air bubbles, then performing cross-linking for 0.5-10 hours at a temperature of 20-100 DEG C, and performing cross-linking molding to obtain a flexible silicone rubber conductor of a hybrid filler. According to the preparation method provided by the invention, the flexible silicone rubber is taken as a matrix, and the carbon black and the carbon fibers or the stainless steel fibers are taken as the hybrid filler and are uniformly dispersed in the silicone rubber matrix, so that both electric conduction and heating are realized; under relatively low applied voltage, relatively high surface temperature can be obtained. The hybrid filler can form a synergistic effect, the electric conduction is formed with relatively low content, and the flexibility of the silicone rubber can be kept; the flexibility of an electric conduction network can be kept to facilitate the preparation of a flexible and deformable heating body.

Description

technical field [0001] The invention relates to a preparation method of a flexible polymer-based conductive heating film, and more specifically, to a preparation method of a silicone rubber-based flexible and deformable conductive heating composite film. Background technique [0002] There are many heating methods and materials currently available, including electric heating, infrared heating, and electromagnetic heating. Due to its high heating efficiency and ease of use, electric heating is widely used. Materials used for electric heating are mainly electrical conductors, wherein electrical conductors include metal conductors and polymer conductors. Due to the ease of preparation, low density and good flexibility, polymer-based conductive composite materials are widely used to make conductive heating materials. The development of society has higher and higher requirements for conductive heating materials. For example, the heating element is required to have better flexib...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08L83/04C08K3/04C08K7/06C08K5/14C08K7/04C08J5/18
CPCC08L83/04C08J5/18C08J2383/04C08K3/04C08K5/14C08K7/04C08K7/06C08K2201/003C08K2201/004C08K2201/014C08L2203/16C08L2205/02C08L83/06
Inventor 张荣胡圣飞刘清亭徐成成胡海龙
Owner HUBEI UNIV OF TECH
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