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High-strength and high-conductivity layered silicone rubber composite material and preparation method thereof

A technology of highly conductive layer and composite material, applied in rubber layered products, chemical instruments and methods, lamination, etc., can solve the problem that a single conductive silicone rubber is difficult to achieve synergy of high conductivity and high strength at the same time

Active Publication Date: 2022-03-01
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to avoid the deficiencies of the prior art, the present invention proposes a high-strength and high-conductivity layered silicone rubber composite material and its preparation method, which solves the problem that a single conductive silicone rubber is difficult to simultaneously realize the synergy of high conductivity and high strength

Method used

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  • High-strength and high-conductivity layered silicone rubber composite material and preparation method thereof
  • High-strength and high-conductivity layered silicone rubber composite material and preparation method thereof
  • High-strength and high-conductivity layered silicone rubber composite material and preparation method thereof

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preparation example Construction

[0036] (1) Preparation of carbon cloth / silicone rubber conductive layer: First, add methyl vinyl silicone rubber raw rubber, fumed silica reinforcing agent and double dipentasulfurizing agent (DPBMH) according to the mass ratio of 100:20:0.5 to Kazakhstan In a gram internal mixer, internally knead at a speed of 30-50r / min at room temperature for 60-30min to obtain a rubber compound. Dissolve the rubber compound in cyclohexane (CYH), soak the carbon cloth (CC) in the solution, and then place it in a fume hood for 24-48 hours to completely evaporate the solvent. Obtain carbon cloth / silicone rubber (CC / MVQ) conductive layer A;

[0037] (2) Preparation of silver-plated copper powder / silicone rubber conductive layer: first, methyl vinyl silicone rubber raw rubber, fumed silica reinforcing agent and double dipentasulfurizing agent (DPBMH) are mixed according to the mass ratio of 100:20:0.5 Put it into a Haake internal mixer, and banbury at room temperature at a speed of 30-50 r / min...

Embodiment 1

[0047] First, add 100 parts of methyl vinyl silicone rubber raw rubber, 20 parts of fumed silica reinforcing agent and 0.5 part of double dipentasulfurizing agent (DPBMH) into the Haake internal mixer, and mix at room temperature at a speed of 50r / min. Refined for 30 minutes to obtain methyl vinyl silicone rubber compound (MVQ).

[0048] Preparation of carbon cloth / silicone rubber conductive layer: dissolve the mixed rubber MVQ in cyclohexane (CYH), soak the carbon cloth (CC) in the solution, and then place it in a fume hood for 48 hours to completely evaporate the solvent to obtain a carbon cloth Cloth / Silicone Rubber (CC / MVQ) Conductive Layer A.

[0049] Preparation of silver-plated copper powder / silicone rubber conductive layer: 100 parts of mixed rubber MVQ was selected as the rubber matrix, 500 parts of silver-plated copper powder with a particle size of 50 μm was used as a conductive filler, and the mixture was densely packed at a speed of 50 r / min using a Haake internal...

Embodiment 2

[0053] First, 60 parts of CY314 methyl vinyl silicone rubber compound, 40 parts of CY316 methyl vinyl silicone rubber compound and 0.5 part of double dipentasulfurizing agent (DPBMH) were added to the Hack internal mixer, at room temperature at 30r / min speed banburying 60min, to obtain methyl vinyl silicone rubber compound (CY314-316).

[0054] Preparation of carbon cloth / silicone rubber conductive layer: Dissolve the mixed rubber CY314-316 in cyclohexane (CYH), soak the carbon cloth (CC) in the solution, and then place it in a fume hood for 36 hours to completely evaporate the solvent. Obtain carbon cloth / silicone rubber (CC / CY314-316) conductive layer A;

[0055] Preparation of silver-plated copper powder / silicone rubber conductive layer: select 100 parts of mixed rubber CY314-316 as the rubber matrix, 500 parts of silver-plated copper powder with a particle size of 50 μm as the conductive filler, and use a Haake mixer at 30r / min Speed ​​banburying 60min. Then use a two-r...

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Abstract

The invention relates to a high-strength and high-conductivity layered silicone rubber composite material and a preparation method thereof. The high-strength and high-conductivity layered silicone rubber composite material comprises a carbon cloth / silicone rubber conductive layer A, a rubber conductive layer C with silver-plated copper powder as conductive filler and a silicone rubber tensile layer B with nickel nanowires and graphene as reinforcement, the conductive layer and the tensile layer are alternately laid in a mold to form a multi-layer ABC multi-layer structure, and the rubber sheet is formed through hot-pressing vulcanization and two-section vulcanization. The preparation method has the advantages that the technical route is simple, the cost is low, no interface problem exists between layers, and the obtained conductive rubber material has good mechanical properties and excellent conductivity. The density of the ABC three-layer conductive silicone rubber with the thickness of 2 mm is as low as 1.8 g / cm < 3 >, the resistivity can be as low as 0.01 omega.cm, the tensile strength can reach 4.12 MPa or above, the right-angle tear strength can reach 12.9 N / mm or above, and the X-waveband electromagnetic shielding effectiveness can reach 50 dB or above. The material can be applied to electronic devices and aircrafts as an electromagnetic shielding sealing material with high conductivity and high strength requirements.

Description

technical field [0001] The invention belongs to the technical field of functional rubber materials and their preparation, and relates to a high-strength and high-conductivity layered silicone rubber composite material and a preparation method thereof. Background technique [0002] Conductive rubber is a category of functional rubber materials. Conductive fillers such as conductive metal powder, carbon black, carbon fiber, carbon nanotubes, and graphene are usually added to the rubber formula, and the conductive filler is made in the rubber by mechanical blending or solution blending. Evenly distributed in the matrix to build an effective conductive network, and then made into highly conductive rubber products through molding. Commonly used conductive rubber substrates are natural rubber, styrene-butadiene rubber, nitrile rubber, EPDM rubber, silicone rubber, and blends of these rubbers. The electrical conductivity is most directly characterized by the resistivity of the rubb...

Claims

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Application Information

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IPC IPC(8): B32B25/20B32B25/04B32B25/02B32B9/00B32B9/04B32B37/06B32B37/10B32B38/00B32B38/08
CPCB32B25/20B32B25/042B32B25/02B32B25/10B32B5/02B32B37/06B32B37/10B32B38/00B32B38/08B32B2038/0076B32B2250/42B32B2307/202B32B2307/50B32B2307/5825B32B2307/212B32B2260/048B32B2260/021B32B2262/106
Inventor 张广成李洪春赵唯贤李本强杨晓东王智伟
Owner NORTHWESTERN POLYTECHNICAL UNIV
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