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Graphene modified polyurethane composite material and preparation method thereof

A graphene modification and composite material technology, applied in the field of polyurethane composite materials, can solve problems such as poor dispersibility, adverse effects on composite material properties, affect compatibility and dispersibility, etc., and achieves increased cross-linking degree, high hardness, The effect of preventing re-aggregation

Active Publication Date: 2022-04-26
泗阳蓝天新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong van der Waals force (π-π stacking) between graphene sheets, it is easy to adsorb and agglomerate together, so the dispersion in many organic solvents and polymers is poor, which affects its compatibility and dispersion in polymers. How to improve the dispersion of graphene in polyurethane composite materials and its compatibility with materials, so as to improve the comprehensive performance of polyurethane composite materials, has become a research hotspot in this field

Method used

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  • Graphene modified polyurethane composite material and preparation method thereof
  • Graphene modified polyurethane composite material and preparation method thereof
  • Graphene modified polyurethane composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A kind of preparation method of graphene modified polyurethane composite material, comprises the following steps:

[0034] (1) Mix 55 parts of polyoxypropylene glycol, 2 parts of modified graphene, 0.5 parts of stannous octoate, 3 parts of cyclopentane and 0.5 parts of silane coupling agent KH550, and stir the reaction at 40°C and 400r / min 50min, obtain mixture A;

[0035] (2) Mix 5 parts of modified inorganic fiber and 45 parts of isophorone diisocyanate, add to the mixture A obtained in step (1), stir at 25°C and 500r / min until the reaction starts, and obtain mixture B;

[0036] (3) Pour the mixture B into a mold, let it stand still for foaming, and perform aging treatment at 100° C. for 3 hours, and obtain the graphene-modified polyurethane composite material after demoulding.

[0037]Wherein, the preparation method of modified graphene comprises the following steps: adding 100 parts of graphene to 500 parts of N,N-dimethylformamide, then adding 1 part of polyvinylp...

Embodiment 2

[0042] A kind of preparation method of graphene modified polyurethane composite material, comprises the following steps:

[0043] (1) Mix 60 parts of polytetrahydrofuran diol, 3 parts of modified graphene, 0.7 parts of triethylenediamine, 4 parts of methyl formate and 2 parts of titanic acid coupling agent CS-101, at 45 ℃, 300r / min Under stirring reaction 45min, obtain mixture A;

[0044] (2) Mix 10 parts of modified inorganic fibers and 40 parts of diphenylmethane diisocyanate, stir at 30°C and 600r / min until the reaction starts, and obtain mixture B;

[0045] (3) Pour the mixture B into a mold, let it stand still for foaming, and perform aging treatment at 110° C. for 2 hours, and obtain the graphene-modified polyurethane composite material after demoulding.

[0046] Wherein, the preparation method of modified graphene comprises the following steps: adding 100 parts of graphene to 500 parts of N,N-dimethylformamide, then adding 2 parts of polyvinylpyrrolidone, and ultrasoni...

Embodiment 3

[0051] A kind of preparation method of graphene modified polyurethane composite material, comprises the following steps:

[0052] (1) Mix 65 parts of tetrahydrofuran-propylene oxide copolymerized glycol, 5 parts of modified graphene, 1 part of dibutyltin dioctoate, 5 parts of water and 3 parts of aluminate coupling agent DL-411, at 50 ℃, 400r Stirring reaction 40min under / min, obtains mixture A;

[0053] (2) Mix 15 parts of modified inorganic fibers and 35 parts of dicyclohexylmethane diisocyanate, stir at 35°C and 700r / min until the reaction starts, and obtain mixture B;

[0054] (3) Pour the mixture B into a mold, let it stand still for foaming, and perform aging treatment at 120° C. for 1 hour, and obtain the graphene-modified polyurethane composite material after demoulding.

[0055] Wherein, the preparation method of modified graphene comprises the following steps: adding 100 parts of graphene to 500 parts of N,N-dimethylformamide, then adding 3 parts of polyvinylpyrrol...

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Abstract

The invention discloses a graphene modified polyurethane composite material and a preparation method thereof. The graphene modified polyurethane composite material is prepared from the following raw materials in parts by weight: 55-65 parts of polyether polyol, 35-45 parts of polyisocyanate, 2-5 parts of modified graphene, 0.5-1 part of a catalyst, 3-5 parts of a foaming agent, 0.5-3 parts of a coupling agent and 5-15 parts of modified inorganic fibers. The graphene and the inorganic fibers are modified, so that the dispersity and compatibility of the graphene in the polyurethane are improved, and the prepared graphene / polyurethane composite material is high in corrosion resistance, high in hardness and excellent in cold resistance and heat resistance; meanwhile, the added modified inorganic fiber improves the mechanical property of the foamed polyurethane composite material. The method provided by the invention is simple to operate, low in cost and wide in application, and the prepared composite material is relatively good in comprehensive properties such as thermal stability and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of polyurethane composite materials, and in particular relates to a graphene-modified polyurethane composite material and a preparation method thereof. Background technique [0002] Polyurethane is a block copolymer with both plasticity and elasticity. The molecular chain contains ester groups, ether groups, carbamate groups, urea groups and other groups. It has high mechanical strength, elasticity and good low temperature resistance. flexibility. It is widely used in the manufacture of microcellular foams, gaskets, insulation panels, tires, hard plastic parts, synthetic leather and many other fields. Since polyurethane is a high molecular polymer composed of alternating sequences of soft and hard segments, its application is limited due to its insufficient electrical and thermal conductivity. Therefore, it is necessary to modify polyurethane materials. [0003] With the development of nanomaterials, the p...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08L75/08C08K3/04C08K9/10C08K9/04C08K7/08C08K7/14C08K7/06C08K9/06C08K13/06C08G18/48C08G18/75C08G18/76C08G101/00
CPCC08J9/141C08J9/142C08J9/0085C08J9/009C08G18/4825C08G18/4854C08G18/755C08G18/7664C08G18/758C08J2375/08C08J2203/14C08G2101/00C08G2110/0083C08G2110/0066
Inventor 朱建成王建男张士亮
Owner 泗阳蓝天新材料科技股份有限公司
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