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Reduced graphene oxide/polyurethane nanocomposite foam, and preparation method and application thereof

A nanocomposite and graphene technology, 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, difficult dispersion, etc., and achieves excellent chemical stability, excellent Reusable, efficient absorption

Active Publication Date: 2017-08-08
重庆飞华环保科技有限责任公司
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  • 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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  • Reduced graphene oxide/polyurethane nanocomposite foam, and preparation method and application thereof
  • Reduced graphene oxide/polyurethane nanocomposite foam, and preparation method and application thereof
  • Reduced graphene oxide/polyurethane nanocomposite foam, and preparation method and application thereof

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preparation example Construction

[0042] The invention provides a method for preparing reduced graphene oxide / polyurethane nano composite foam, which includes the following steps:

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

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

[0045] (3) Foaming the prepolymer obtained in the step (2) to obtain graphene oxide / polyurethane nanocomposite foam;

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

[0047] In the present invention, graphene oxide is mixed with an organic solvent to obtain a graphene oxide dispersion. The present invention do...

Embodiment 1

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

[0086] (2) Preparation of graphene oxide / polyurethane nanocomposite foam: 40mg of graphene oxide obtained in step (1) was added to 4ml of N,N-dimethylformamide, and dispersed in an ultrasonic cleaner for 2 hours at room temperature to obtain uniformity Then, add 4.56g polyether 330, 2.28...

Embodiment 2

[0099] According to the preparation method of Example 1, the dosage of polyether 330 was adjusted to 5.7 g, and the dosage 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 preparation field of nano composite materials, in particular to a reduced graphene oxide / polyurethane nano composite foam, and a preparation method and application thereof. Background technique [0002] Adequate freshwater resources are an important guarantee for human survival and development. However, more and more cities and regions are facing the problem of scarcity of fresh water resources. Humans urgently need to find a high-efficiency, low-energy-consumption freshwater preparation solution to solve this problem. Due to the cleanliness and renewable ability of solar energy and the high reserves of seawater resources, solar desalination technology has become the most effective solution to the above-mentioned problems. However, traditional solar desalination technology has low conversion efficiency due to the need to heat the entire seawater. The waste of energy. Relying on the local thermal effect generated by highly abso...

Claims

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Application Information

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Patent Type & Authority Applications(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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