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A kind of reduced graphene oxide/polyurethane nanocomposite foam and its preparation method and application

A nanocomposite and graphene technology, which is applied in the field of nanocomposite material preparation, can solve the problems of insufficient stability of high thermal conductivity macroscopic assemblies, limited photothermal conversion efficiency of carbon-based materials, and difficulty in dispersing, achieving excellent chemical stability and excellent Reusable, efficient absorption effect

Active Publication Date: 2019-07-16
重庆飞华环保科技有限责任公司
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with noble metal materials, carbon-based materials have the advantage of low cost, but they also have inherent shortcomings, such as difficult dispersion, high thermal conductivity, and insufficient stability of macroscopic assemblies. These shortcomings limit the improvement and industrialization of carbon-based materials in terms of photothermal conversion efficiency. Applications

Method used

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  • A kind of reduced graphene oxide/polyurethane nanocomposite foam and its preparation method and application
  • A kind of reduced graphene oxide/polyurethane nanocomposite foam and its preparation method and application
  • A kind of reduced graphene oxide/polyurethane nanocomposite foam and its preparation method and application

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preparation example Construction

[0042] The invention provides a kind of preparation method of reduced graphene oxide / polyurethane nanocomposite foam, comprises the following steps:

[0043] (1) graphene oxide is mixed with an organic solvent to obtain a graphene oxide dispersion;

[0044] (2) The graphene oxide dispersion obtained in the step (1), polyether 330, polyethylene glycol, diisocyanate, triethanolamine, dibutyltin dilaurate, silicone oil and water are mixed to obtain a mixture, and the The mixture is prepolymerized to obtain a prepolymer;

[0045] (3) the prepolymer that described step (2) is obtained is foamed, obtains graphene oxide / polyurethane nanocomposite foam;

[0046] (4) Mix the graphene oxide / polyurethane nanocomposite foam obtained in the step (3) with a reducing agent, and perform reduction under microwave conditions to obtain reduced graphene oxide / polyurethane nanocomposite foam.

[0047] The invention mixes graphene oxide with an organic solvent to obtain a graphene oxide dispersio...

Embodiment 1

[0085] (1) Preparation of graphene oxide: Mix 360ml of concentrated sulfuric acid and 40ml of concentrated phosphoric acid and pour it into a three-necked flask equipped with 3g of flake graphite. Under the condition of magnetic stirring at 50°C, slowly add 18g of potassium permanganate and continue stirring 12 hours; then after the mixture is cooled to room temperature, pour it on about 400ml ice containing 3ml 30% hydrogen peroxide, continue to add hydrogen peroxide dropwise until it does not change color; then centrifuge the product to remove the supernatant, and the obtained product is washed , after ultrasonic stripping, flocculate with sodium hydroxide and dry at 20°C for 10 hours, and grind to obtain graphene oxide solid powder;

[0086](2) Preparation of graphene oxide / polyurethane nanocomposite foam: add 40 mg of graphene oxide obtained in step (1) to 4 ml of N,N-dimethylformamide, and ultrasonically disperse in an ultrasonic cleaner for 2 hours at room temperature to ...

Embodiment 2

[0099] According to the preparation method of Example 1, only the amount of polyether 330 was adjusted to 5.7 g, and the amount of polyethylene glycol 200 was adjusted to 1.9 g.

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Abstract

The invention provides a preparation method for reduced graphene oxide / polyurethane nanocomposite foam. The preparation method comprises the steps: mixing graphene oxide with an organic solvent to obtain a graphene oxide dispersion liquid; then mixing the graphene oxide dispersion liquid with polyether 330, polyethylene glycol, diisocyanate, triethanolamine, dibutyltin dilaurate, silicone oil and water, and then performing prepolymerization to prepare a prepolymer; enabling the prepolymer to foam to obtain graphene oxide / polyurethane nanocomposite foam; reducing the graphene oxide / polyurethane nanocomposite foam under microwave conditions so as to obtain reduced graphene oxide / polyurethane nanocomposite foam. The preparation method has the advantages that solar energy can be efficiently absorbed and converted into heat energy, uniform dispersion and stable loading of graphene oxide can be realized, and effective supply of underlying water to a surface vaporization area can be realized while heat conduction is reduced.

Description

technical field [0001] The invention relates to the field of preparation of nanocomposite materials, in particular to a reduced graphene oxide / polyurethane nanocomposite foam and its preparation method and application. Background technique [0002] Sufficient fresh water resources are an important guarantee for human survival and development. However, more and more cities and regions today are facing the problem of scarcity of fresh water resources, and human beings urgently need to find a high-efficiency, low-energy-consumption fresh water preparation solution to solve this problem. Due to the cleanliness and renewable capabilities of solar energy and the high reserve of seawater resources, solar desalination technology has become the most effective solution to the above problems. However, the traditional solar desalination technology has low conversion efficiency and causes waste of energy. Relying on the local thermal effect generated by highly light-absorbing nanoparti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/34C08G18/12C08K3/04
CPCC08G18/12C08G18/6674C08G18/6688C08G18/6692C08K3/04C08G2110/0083
Inventor 王贤保王刚付洋梅涛李金华王建颖
Owner 重庆飞华环保科技有限责任公司
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