A two-component addition type thermally conductive silicone rubber containing graphene and its preparation method

A heat-conducting silicone rubber and graphene technology, applied in the field of sealants, can solve the problems of large proportion of silicone rubber, adverse effects in the construction process, difficult application, etc., and achieve the effect of small shrinkage rate

Inactive Publication Date: 2020-06-19
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN101665623A discloses a two-component addition type self-adhesive silicone rubber, whose thermal conductivity can reach more than 1W / m·K, but the mass fraction of the added thermal conductive filler (aluminum oxide) is 100-300 parts, The proportion of the prepared silicone rubber is also very large, which will not only cause adverse effects on the construction process, but also be difficult to be applied in some fields

Method used

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  • A two-component addition type thermally conductive silicone rubber containing graphene and its preparation method
  • A two-component addition type thermally conductive silicone rubber containing graphene and its preparation method
  • A two-component addition type thermally conductive silicone rubber containing graphene and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] 100 parts by weight of α, ω-divinyl polydimethylsiloxane with a viscosity of 1000 cps and a vinyl mass percentage of 0.05%, 5 parts by weight of hydrogen-containing polysiloxane with a hydrogen content of 0.1 wt%, 5 parts by weight Parts by weight of modified graphene and 1 part by weight of ethynyl cyclohexanol were added to the stirred tank, and stirred at room temperature for 2 hours under a vacuum of 0.9 MPa to prepare component A;

[0035] 100 parts by weight of α, ω-divinylpolydimethylsiloxane with a viscosity of 1000cps and a vinyl mass percentage of 0.05%, and 2 parts by weight of chloroplatinic acid-divinyltetramethyldisiloxane The modified graphene of material, 5 weight parts, in the condition that vacuum is 0.9MPa, stir at room temperature for 2 hours, make component B;

[0036] Mix Component A and Component B at a weight ratio of 1:1, stir evenly, and vulcanize at 95°C for 2 hours to obtain a two-component addition type heat-conducting silicone rubber. See a...

Embodiment 2

[0038]100 parts by weight of α, ω-divinyl polydimethylsiloxane with a viscosity of 10000 cps and a vinyl mass percentage of 0.5%, 10 parts by weight of hydrogen-containing polysiloxane with a hydrogen content of 0.18 wt%, 10 Parts by weight of modified graphene and 3 parts by weight of ethynylcyclohexanol were added to the stirred tank, and stirred at room temperature for 2.5 hours under a vacuum of 0.9 MPa to prepare component A;

[0039] 100 parts by weight of α, ω-divinylpolydimethylsiloxane with a viscosity of 10000cps and a vinyl mass percentage of 0.5%, and 1 part by weight of chloroplatinic acid-divinyltetramethyldisiloxane The modified graphene of material, 10 parts by weight is added in the stirred tank, and under the condition of vacuum degree of 0.99MPa, it is stirred at normal temperature for 2.5 hours, and component B is obtained;

[0040] Mix Component A and Component B at a weight ratio of 1:1, stir evenly, and vulcanize at 95°C for 2 hours to obtain a two-compo...

Embodiment 3

[0042] 100 parts by weight of α, ω-divinyl polydimethylsiloxane with a viscosity of 20000 cps and a vinyl mass percentage of 1.0%, 20 parts by weight of hydrogen-containing polysiloxane with a hydrogen content of 0.26 wt%, 15 The modified graphene of weight part, the ethynyl cyclohexanol of 5 weight parts are added in the stirred tank, and under the condition of vacuum degree of 0.99MPa, stir at normal temperature for 3 hours, make component A;

[0043] 100 parts by weight of α, ω-divinylpolydimethylsiloxane with a viscosity of 20000cps and a vinyl mass percentage of 1.0%, and 0.5 parts by weight of chloroplatinic acid-divinyltetramethyldisiloxane The modified graphene of material, 15 parts by weight is added in the stirred tank, and under the condition of 0.99MPa, the vacuum is stirred at normal temperature for 3 hours, and component B is obtained;

[0044] Mix Component A and Component B at a weight ratio of 1:1, stir evenly, and vulcanize at 95°C for 1.5 hours to obtain a t...

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Abstract

The invention discloses a double-ingredient addition type heat conduction silicone rubber containing graphene, and a preparation method thereof, and belongs to the field of sealant. The heat conduction silicone rubber is prepared from a component A and a component B, wherein the component A is prepared from alpha,omega-divinyl polydimethylsiloxane, hydrogen-containing polysiloxane, modified graphene, hydrophobic fumed silica and inhibitor; the component B is prepared from alpha,omega-divinyl polydimethylsiloxane, chloroplatinic acid-divinyl tetramethyldisiloxane complex, modified graphene andhydrophobic fumed silica; the component A and the component B are evenly mixed. The double-ingredient addition type heat conduction silicone rubber adopts silicon dioxide and long-chain silane dual modified graphene as a functional filler, so that silica gel has good thermal conductivity and also has the advantages of good mechanical performance and thermal resistance and small specific gravity which is obviously lower than that of common thermal conduction silica gel full of aluminium oxide in the market, and can be widely applied in the fields including new energy and the like.

Description

technical field [0001] The invention belongs to the field of sealants, and in particular relates to a graphene-containing two-component addition type heat-conducting silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is based on linear polyorganosiloxane polymer (raw rubber), adding crosslinking agent, reinforcing agent and other compounding agents, after compounding and vulcanization, it forms an elastomer. It has a wide temperature range and can be used for a long time between -50°C and 200°C, which is beyond the reach of any other elastomer. In addition, it also has excellent thermal stability, electrical insulation, water repellency, weather resistance, ozone resistance, air permeability, high transparency, tear strength, excellent heat dissipation and excellent radiation resistance, corrosion resistance, Non-toxic, tasteless, physiologically inert and other excellent properties, it is widely used in electrical and electronic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/07C09J183/05C09J11/04
CPCC08L2201/08C08L2205/025C08L2205/035C09J11/04C09J183/04C08L83/04C08K13/06C08K9/10C08K9/06C08K3/36C08K7/00C08K3/04
Inventor 马文石邹逸丰杨波张双红
Owner SOUTH CHINA UNIV OF TECH
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