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Graphene/acrylate rubber composite and preparation method thereof

A technology of acrylate and composite materials, applied in the field of acrylate rubber, can solve the problems of low tensile strength, non-use of environmental protection, etc., and achieve the effect of improving tensile strength

Active Publication Date: 2018-07-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the low tensile strength caused by the difficult vulcanization of carboxyl-containing acrylate rubber and the disadvantages of not utilizing environmental protection, introduce graphene oxide into the acrylate rubber emulsion and restore it, and provide a acrylate rubber with high tensile strength. Graphene / acrylate rubber composite material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]At room temperature, 40 g of ethyl acrylate, 55 g of butyl acrylate, 5 g of acrylic acid, 2 g of sodium lauryl sulfate and 1 g of allyloxy nonylphenol ether were added to 100 g of deionized water, and stirred evenly to obtain a pre-emulsion; Take 35g of pre-emulsion and add it to the reactor, heat up to 70°C, add an aqueous solution containing 1g of initiator and 5g of deionized water, react for 1h, then drop the remaining pre-emulsion within 2.5h, and continue to heat up to 90°C and react for 2h, then lowered to room temperature to obtain acrylate rubber emulsion.

[0029] Add 40g of graphene oxide aqueous solution with a mass concentration of 0.3% to 100g of acrylate rubber emulsion, stir at a speed of 300rpm for 60min; add 0.5g of hydrazine hydrate, heat up to 80°C and react for 1.5h; then, cool to room temperature , add 12g mass concentration and be that the calcium chloride aqueous solution of 10% carries out demulsification to the mixed emulsion, after washing the ...

Embodiment 2

[0031] At room temperature, 45g of ethyl acrylate, 50g of butyl acrylate, 4g of acrylic acid, 1.5g of sodium dodecylbenzenesulfonate and 1.5g of allyloxy nonylphenol ether were added to 120g of deionized water, and stirred evenly to obtain the prepared Emulsion: Add 30g of pre-emulsion into the reactor, heat up to 65°C, add an aqueous solution containing 1g of initiator and 5g of deionized water, react for 0.5h, and then drop the remaining pre-emulsion within 3h. Continue to raise the temperature to 85°C and react for 2h, then cool down to room temperature to obtain acrylate rubber emulsion.

[0032] Add 200g of graphene oxide aqueous solution with a mass concentration of 0.2% to 80g of acrylate rubber emulsion, stir at a speed of 600rpm for 30min; add 3g of hydrazine hydrate, heat up to 85°C and react for 1.5h; then, cool to room temperature, Adding 20g of mass concentration is 5% calcium chloride aqueous solution to carry out demulsification to the mixed emulsion, wash the c...

Embodiment 3

[0034] At room temperature, 50g of ethyl acrylate, 40g of butyl acrylate, 6g of acrylic acid, 2g of sodium lauryl sulfate and 3g of alkenylphenol polyoxyethylene ether were added to 110g of deionized water, and stirred evenly to obtain a pre-emulsion; Add 25g of pre-emulsion into the reactor, heat up to 60°C, add an aqueous solution containing 0.5g of initiator and 3g of deionized water, react for 1.5h, then drop the remaining pre-emulsion within 3h, and continue to heat up to 80°C and react for 3h, then lower to room temperature to obtain acrylate rubber emulsion.

[0035] Add 150g of graphene oxide aqueous solution with mass concentration of 0.7% to 100g of acrylate rubber emulsion, stir at 450rpm for 40min; add 4g of hydrazine hydrate, heat up to 80°C and react for 2h; then, cool to room temperature, add 15g mass concentration is that the calcium chloride aqueous solution of 15% is carried out demulsification to mixed emulsion, after condensate is washed, vacuum-dried 12h a...

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Abstract

The invention discloses a graphene / acrylate rubber composite and a preparation method of the graphene / acrylate rubber composite. The preparation method is as follows: taking butyl acrylate, ethyl acrylate and crylic acid as reaction monomers, preparing an acrylic rubber emulsion through emulsion polymerization under the actions of an emulsifying agent and an initiator; adding an aqueous dispersionliquid of graphene oxide into the acrylic rubber emulsion, stirring at the high speed to mix evenly, adding a reducing agent to reduce the graphene oxide, demulsifying, coagulating, washing with water, drying, mixing and vulcanizing to obtain the graphene / acrylate rubber composite. The graphene / acrylate rubber composite overcomes the defect of relatively low tensile strength caused by difficult vulcanizing of the acrylic rubber at present, the partially oxidized graphene oxide is introduced into the acrylic rubber to play a role in strengthening and participate in vulcanizing, so that the tensile strength of the acrylic rubber material is obviously improved.

Description

technical field [0001] The invention relates to acrylate rubber, in particular to a graphene / acrylate rubber composite material and a preparation method thereof. Background technique [0002] Acrylate rubber is an elastomer formed by copolymerization of acrylate as the main monomer. It has the advantages of heat resistance, aging resistance, oil resistance, and ultraviolet resistance. It is widely used in hydraulic oil pipes, cylinder gaskets, and valve stems of automobiles and locomotives. , crankshaft and other parts, enjoy the reputation of "automotive glue". In recent years, with the rapid development of the automobile industry, the demand for acrylic rubber at home and abroad shows a trend of rapid increase. At present, chlorine-containing acrylate rubber is the most produced variety in China, but the hydrogen chloride gas released during the processing is relatively corrosive to mills and vulcanization molds, and will cause serious pollution to the environment. With ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08K13/02C08K3/04C08K5/31C08K5/09C08K5/18C08F220/18C08F220/06
CPCC08F220/18C08F220/1804C08K3/04C08K5/09C08K5/18C08K5/31C08K13/02C08L33/08C08F220/06
Inventor 李红强王惊曾幸荣赖学军张林
Owner SOUTH CHINA UNIV OF TECH
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