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Polyurethane foam and modified graphene and preparation methods thereof

A technology of polyurethane foam and graphene, which is applied in the field of packaging materials, can solve the problems of poor cushioning capacity, low strength, and easy agglomeration, and achieve the effects of improved mechanical strength, good mechanical properties, and strong buffering capacity

Inactive Publication Date: 2017-04-05
XIAMEN AMESON NEW MATERIAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since graphene is an inorganic carbon material and has an ultra-high specific surface area (2630m 2 / g), it is very easy to agglomerate with each other, and it is difficult to disperse evenly in solvents and polymer materials, which greatly limits the application of graphene.
At present, polyurethane foam has low strength, poor cushioning capacity, and inconvenient use.

Method used

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  • Polyurethane foam and modified graphene and preparation methods thereof
  • Polyurethane foam and modified graphene and preparation methods thereof
  • Polyurethane foam and modified graphene and preparation methods thereof

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[0021] This embodiment provides a polyurethane foam with modified graphene. The polyurethane foam is prepared by mixing and foaming white material and black material. The raw material of white material includes modified graphene. The preparation method of modified graphene includes: After the graphene oxide reacts with the foam stabilizer, it reacts with a reducing agent; wherein, the foam stabilizer is a polysiloxane-polyoxyalkylene copolymer.

[0022] In a preferred embodiment of the present invention, the basic structural unit of polysiloxane-polyoxyalkylene copolymer is:

[0023]

[0024] Wherein, R is one or more of an alkyl group, an aryl group, hydrogen, a hydroxyl group, an alkoxy group, an acetoxy group, a carbon functional group and a polyether chain.

[0025] Polysiloxane-polyoxyalkylene copolymer is non-hydrolyzable and highly active. The foam stabilizer with this structure has various structures and is often used as a raw material for the production of polyuret...

Embodiment 1

[0053] The present embodiment provides a kind of modified graphene, and the preparation method of this modified graphene is:

[0054] Ultrasonic disperse 3 parts of graphene oxide in a mixed solution of 150 parts of water and ethanol (the volume ratio of water and ethanol is 1:2), then mix with 1 part of foam stabilizer and stir at 50°C for 4 hours, filter and wash The resulting solid was dispersed in 100 parts of water, then mixed with 0.5 parts of sodium borohydride and stirred at 70°C for 8 hours, washed with alcohol and deionized water until the filtrate was neutral, and vacuum-dried to obtain modified graphene.

Embodiment 2

[0056] The present embodiment provides a kind of modified graphene, and the preparation method of this modified graphene is:

[0057] Disperse 4 parts of graphene oxide in a mixed solution of 200 parts of water and methanol (the volume ratio of water to ethanol is 1:1), then mix with 1.5 parts of polysiloxane-polyoxyalkylene copolymer and mix at 30 Stir and react at ℃ for 6h, filter and wash, disperse the obtained solid in 90 parts of water, then mix with 1 part of hydrazine hydrate and stir and react at 80℃ for 7h, wash with alcohol and deionized water until the filtrate is neutral, and vacuum dry Obtain modified graphene.

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Abstract

The invention provides polyurethane foam and modified graphene and preparation methods thereof and belongs to the field of packaging materials. The polyurethane foam is prepared through mixing and foaming of a white material and a black material. The raw materials of the white material include the modified graphene. The preparation method of the modified graphene includes the steps that graphene oxide and a foam stabilizer are reacted, and then mixed reaction with a reducing agent is performed, wherein the foam stabilizer is a polysiloxane-polyoxyalkylene copolymer. The preparation method of the polyurethane foam includes the steps that the modified graphene is prepared; components in the raw materials are mixed according to parts by weight, and the white material is obtained; and the white material and the black material which are equal in mass are mixed and foamed. The graphene is firmly connected to a molecular backbone of polyurethane, so that the strength and the buffering property of the polyurethane foam are better.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a polyurethane foam, a modified graphene and their preparation methods. Background technique [0002] Graphene is a new carbon material with a two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms densely packed through sp2 hybridization. Carbon nanotubes and three-dimensional graphite. Due to this unique structure of graphene, it has various excellent properties. It is considered to be the hardest and toughest (modulus about 1100GPa, fracture strength about 130GPa) material among existing materials. By adding a small amount of graphene It can greatly improve the mechanical strength of the material, so it is widely used in the enhancement and modification of materials. [0003] However, since graphene is an inorganic carbon material and has an ultra-high specific surface area (2630m 2 / g), it is very easy to agglomerate with each other, and it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K9/04C08K9/02C08K3/04C08J9/08C08G101/00
CPCC08G18/4804C08G18/7664C08K3/04C08K9/02C08K9/04C08G2110/0083
Inventor 涂宗铃伍毓强谢丽姗
Owner XIAMEN AMESON NEW MATERIAL INC
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