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A kind of preparation method of graphene modified rubber composite material and rubber composite material

A technology of graphene modification and composite materials, which is applied in the field of rubber composite materials and the preparation of graphene modified rubber composite materials, which can solve problems such as structural defects, affecting crosslinking density, and affecting the comprehensive performance of graphene blended rubber Achieve the effect of less structural defects and good compatibility

Active Publication Date: 2021-03-30
江苏碳谷二维世界科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The defect of the above-mentioned CN106608993A and CN106633178A two schemes is that the presence of solvent in the blending system will affect the crosslinking density. The graphene oxide of CN108641129A is the oxidation product of graphene. Compared with graphene, there are obvious defects in the structure, which will affect the comprehensive performance of graphene blend rubber.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation method of embodiment 1 graphene modified rubber composite material comprises the following steps:

[0039] S1: Graphene is ultrasonically dispersed in butanone, polyethylene glycol monomethyl ether is added to the solvent, and mixed thoroughly to obtain a graphene-polyethylene glycol monoether solution;

[0040] S2: Mix the hexamethylene diisocyanate trimer and the graphene-polyethylene glycol monoether solution evenly, then add a tertiary amine neutralizer, heat up to 70°C for reaction, distill under reduced pressure to remove methyl ethyl ketone, and dry poly Ethylene glycol monoether modified polyisocyanate;

[0041] S3: Add the rubber mixing raw material containing polyethylene glycol monoether modified polyisocyanate obtained in S2 to the banburying equipment, and through banburying and mixing, the finished graphene-modified rubber composite material is obtained

[0042] The composition of rubber mixing raw materials is 100 parts of natural rubber,...

Embodiment 2

[0049] Embodiment 2 is based on embodiment 1, and the difference is that the composition of rubber mixing raw materials is 100 parts of natural rubber, 3 parts of stearic acid, 5 parts of zinc oxide, 2 parts of polyethylene glycol monoether modified polyisocyanate, accelerator CZ 2 parts, 0.5 parts of N-cyclohexylthiophthalimide, and 30 parts of white carbon black.

Embodiment 3

[0051] Embodiment 3 is based on embodiment 2, the difference lies in the preparation process of polyethylene glycol monoether modified polyisocyanate, in embodiment 3 adopt the method of first anion hydrophilic modification and then non-ionic hydrophilic modification.

[0052] The modification process of S2 is: mix hexamethylene diisocyanate trimer and anionic hydrophilic modifier 3-cyclohexylaminopropanesulfonic acid evenly, then add a tertiary amine neutralizer, heat up to 85°C to react, After reacting for 5 hours, add the graphene-polyethylene glycol monoether solution obtained by S1 into the reaction system and mix evenly, keep the temperature at 70°C for reaction, control the end point of the reaction as in Example 1, and finally remove the organic solvent in the reaction system; The molar ratio of isocyanate trimer, 3-cyclohexylaminopropanesulfonic acid and polyethylene glycol monoether is 1:0.15:0.04, and the molar ratio of hexamethylene diisocyanate trimer to tertiary a...

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Abstract

The invention discloses a preparation method of a graphene-modified rubber composite material. The method comprises the following steps: S1, ultrasonically dispersing graphene in an organic solvent, adding polyethylene glycol monoether to the solvent, and performing thorough mixing to obtain a graphene-polyethylene glycol monoether solution; S2, modifying polyisocyanate with the graphene-polyethylene glycol monoether solution obtained in step S1 as a hydrophilic modifier to obtain polyethylene glycol monoether modified polyisocyanate; and S3, adding a rubber mixed raw material containing the polyethylene glycol monoether modified polyisocyanate obtained in step S2 into an internal mixer, and carrying out internal mixing and mixing to obtain the finished graphene-modified rubber composite material. The graphene is mixed and dispersed in the polyisocyanate preparation system to prepare the graphene-doped polyisocyanate, and the polyisocyanate is applied to a rubber vulcanization reactionas a vulcanizer, and participates in the vulcanization reaction to make the graphene uniformly dispersed in a rubber material.

Description

technical field [0001] The invention relates to the technical field of rubber materials, in particular to a preparation method of a graphene-modified rubber composite material and the rubber composite material. Background technique [0002] Graphene has an ultra-high specific surface area, and adding a small amount to rubber materials can significantly improve the performance of rubber composite materials, such as mechanical properties, electrical properties and thermal conductivity. The difficulty of graphene composite materials in the prior art is that graphene is in the base material. Easy to agglomerate and difficult to disperse evenly. [0003] Graphene is used for the modification of rubber as described in CN106608993A, CN106633178A, CN108641129A, CN108794949A, in the graphene-modified epoxidized butadiene rubber in CN106608993A, graphene is first dispersed in solvent, then the dispersion liquid is mixed with epoxy Mixed cis-butadiene rubber glue, the selection range ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08L71/02C08K13/02C08K3/04
CPCC08L7/00C08L71/02C08K13/02C08K3/042
Inventor 戴中秋戴剑
Owner 江苏碳谷二维世界科技有限公司
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