Graphene modified polyurethane foam and preparation method thereof

A polyurethane foam and graphene modification technology, which is applied in the field of polyurethane foam, can solve the problems of polyurethane foam and other problems, achieve good mechanical properties and improve the effect of interaction

Inactive Publication Date: 2019-09-17
江苏江山红化纤有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there is no report on the preparation of polyurethane foam by using graphene grafted isocyanate

Method used

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  • Graphene modified polyurethane foam and preparation method thereof

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preparation example Construction

[0026] The preparation method of this graphene-modified polyurethane foam adopts the method of in-situ polymerization, which is different from the method of direct addition such as blending. Specifically: graphene is functionalized graphene with isocyanate groups, and isocyanate-functionalized graphene It is prepared by modifying graphene oxide;

[0027] Graphene-modified polyurethane foam is formed by reacting isocyanate, isocyanate-modified graphene, polyether polyol, chain extender, foaming agent, catalyst, and silicone foam stabilizer under certain conditions;

[0028] The mass of graphene accounts for 0.05%-0.3% of the mass of isocyanate.

[0029] The preparation method of graphene modified polyurethane foam, the concrete steps of this preparation method comprise:

[0030] The first step, preparation of isocyanate functionalized graphene

[0031] Add the graphene powder into the solvent for dispersion;

[0032] Then add TDI, react at a temperature of 80-100°C, and the ...

Embodiment 1

[0049] The first step, preparation of isocyanate functionalized graphene

[0050] Weigh 1g of graphene oxide, add 50g of dehydrated xylene, after ultrasonication for 0.5h, add 10g of TDI, and react at a temperature of 95°C for 6h;

[0051] After the reaction was completed, wash and suction filter three times with dehydrated toluene;

[0052] Then dry in a vacuum oven at 80° C. to obtain gray ultrafine powder of isocyanate-functionalized graphene.

[0053] The second step, the preparation of graphene modified polyurethane foam

[0054] Take 46g of TDI, add 0.1g of isocyanate functionalized graphene, ultrasonic and strong shear dispersion for 0.5h;

[0055] According to the soft foam formula, take 100g of polyether polyol, 0.4g of organotin catalyst, 0.2g of tertiary amine catalyst, 1g of silicone foam stabilizer, 3g of water, and 1g of auxiliary foaming agent. After stirring rapidly, pour it into the mold to obtain polyurethane foam block bubbles.

Embodiment 2

[0057] The first step, preparation of isocyanate functionalized graphene

[0058] Weigh 2g of graphene oxide, add 50g of dehydrated xylene, after ultrasonication for 0.5h, add 5g of TDI, and react at 95°C for 6h;

[0059] After the reaction was completed, wash and suction filter three times with dehydrated toluene;

[0060] Then dry in a vacuum oven at 80°C to obtain gray ultrafine powder of isocyanate-functionalized graphene.

[0061] The second step, the preparation of graphene modified polyurethane foam

[0062] Take 46g of TDI, add 0.3g of isocyanate functionalized graphene, ultrasonic and strong shear dispersion for 0.5h;

[0063]According to the soft foam formula, take 100g of polyether polyol, 0.4g of organotin catalyst, 0.2g of tertiary amine catalyst, 1g of silicone foam stabilizer, 3g of water, and 3g of auxiliary foaming agent. After stirring rapidly, pour it into the mold to obtain polyurethane foam block bubbles.

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Abstract

The invention relates to the technical field of graphene, in particular to graphene modified polyurethane foam and a preparation method thereof. Graphene is functionalized graphene with isocyanate groups; the isocyanate functionalized graphene is prepared from graphene oxide through modification; the graphene modified polyurethane foam is prepared from isocyanate, isocyanate modified graphene, polyether polyol, chain expanding agents, foaming agents, catalysts and organic silicon foam stabilizing agents through reaction under certain conditions. In order to improve the mutual action of graphene and polyurethane molecular chains, the graphene stably exists in the graphene foam; graphene oxide is subjected to isocyanate modification; isocyanate groups are introduced at the surface. The isocyanate groups can react with polyether polyol; the goal of modifying the polyurethane foam through graphene polymerization is achieved. The prepared graphene modified polyurethane foam has good mechanical performance, and simultaneously has functionality of bacteria resistance and bacteriostasis, far infrared function and the like.

Description

technical field [0001] The invention relates to a polyurethane foam, in particular to a graphene-modified polyurethane foam and a preparation method thereof. Background technique [0002] Flexible polyurethane foam is the most widely used polyurethane product. With its low density, good elastic recovery, breathability, and heat preservation, it can be widely used in packaging materials such as furniture cushions, fragile products, and precision instruments. Thermal insulation materials, vehicle seat cushion materials, etc. The addition of some functional substances can make the polyurethane foam have functions such as far infrared, antibacterial and antibacterial, but it is generally added by physical addition, and its functional stability is poor. [0003] Graphene is a new type of two-dimensional nanomaterial, which has the title of "industrial monosodium glutamate". Graphene has many excellent properties, such as excellent optical properties, electrical properties, mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K9/04C08K3/04C08J9/08C08G101/00
CPCC08G18/4829C08G18/7614C08K9/04C08K3/042C08G2110/0083
Inventor 刘雪静周良艳姜文静陆芳赵畅曹建鹏万元俊周露马宏明郑家红
Owner 江苏江山红化纤有限责任公司
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