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Intelligent polymer composite, preparation method and application of intelligent polymer composite

A technology of smart polymers and composite materials, which is applied in the field of self-repair of composite materials, can solve the problems of no light stimulus response and achieve the effect of enhancing the strength of polymers

Inactive Publication Date: 2016-12-14
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most polymer materials do not have the ability to respond to light stimuli. At present, the most studied is the use of inorganic filler materials for photothermal conversion to achieve self-healing effects.

Method used

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  • Intelligent polymer composite, preparation method and application of intelligent polymer composite
  • Intelligent polymer composite, preparation method and application of intelligent polymer composite
  • Intelligent polymer composite, preparation method and application of intelligent polymer composite

Examples

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preparation example Construction

[0034] A method for preparing an intelligent polymer composite material, comprising the following steps: uniformly dispersing functionalized graphene in an anhydrous polar organic solvent, adding polyurethane, and reacting for 4-10 hours at a temperature of 50-100°C to obtain The intelligent polymer composite material; wherein, the polyurethane is isocyanate-terminated polyurethane with diene synthesis reaction.

[0035] Preferably, see figure 1 , the functionalized graphene is prepared by the following method:

[0036] Step S110: preparing graphite oxide by the Hummers method;

[0037] Step S120: ultrasonically disperse the graphite oxide in deionized water to form a graphene oxide aqueous solution, and react the graphene oxide aqueous solution with an alcohol amine at a pH of 1-5 and a temperature of 40-60°C for 6-24 hours ;

[0038] Preferably, the concentration of the graphene oxide aqueous solution is 0.2 mg / mL˜10 mg / mL.

[0039] Preferably, the alcoholamine is at lea...

Embodiment 1

[0054] 1g of 4,4'-methylenebis(phenylisocyanate) was dissolved in N,N-dimethylformamide and stirred, adding polytetrahydrofuran, N 2 Atmosphere, react at 80°C for two hours; add the DMF solution of furan methanol and N,N'-(4,4'-methylenediphenyl)bismaleimide to the above solution after pre-reacting at 60°C for 2 hours , react in N2 atmosphere for 2h; finally take 6.1mg of functionalized graphene and add it into the above solution to stir and react for 5h, so as to obtain functionalized graphene / polyurethane composite material. Finally, the obtained mixture was poured into a tetrafluoroethylene mold and dried in a vacuum oven to shape.

[0055] Introduce a wound on the obtained functionalized graphene / polyurethane composite film, and repair it under an infrared laser with a wavelength of 980nm and a power density of 7mW / cm2.

[0056] see image 3 , is the graphene oxide and functionalized graphene XRD contrast figure that embodiment 1 makes; Fig. 6 is the XRD spectrogram of g...

Embodiment 2

[0060] The difference between the preparation method of the smart polymer composite material capable of self-repairing by infrared light in this example and Example 2 lies in that 30.5 mg of functionalized graphene is added and reacted for 5 hours. Other steps are as in Example 1.

[0061] Introduce the wound on the obtained functionalized graphene / polyurethane composite film, and repair it under the infrared light with a wavelength of 980nm and a power density of 6mW / cm2.

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Abstract

The invention provides a preparation method of an intelligent polymer composite. The preparation method includes the steps that functionalized graphene is uniformly dispersed in an anhydrous polar organic solvent, isocyanate-terminated polyurethane with a diene synthesis reaction is added, a reaction is carried out for 4-10 h at 50-100 DEG C, and the intelligent polymer composite is obtained. Functionalized graphene is connected to a polymer material with covalent bonds, the effect of uniform dispersion is achieved, and the strength of the polymer is improved; meanwhile, the optothermal conversion property of graphene is utilized, infrared light serves as a stimulus, and the effect of directional fixed-point repair is achieved.

Description

technical field [0001] The invention relates to the technical field of composite material self-repair, in particular to an intelligent polymer composite material, a preparation method and an application thereof. Background technique [0002] Polymers and their composite materials have been widely used in machinery, electronics, aerospace and other fields due to their excellent properties. In the process of processing and use, polymer materials will inevitably produce a certain degree of damage, resulting in a decline in performance. In order to enhance the strength of polymer materials and expand its application range, a large number of inorganic filler materials have been studied, such as: carbon nanotubes, graphene, glass fibers, nano-silicon, etc. [0003] Self-healing materials imitate the self-healing mechanism of biological damage, and self-repair the micro-cracks inside the material to improve the safety of the material, prolong the service life, and reduce the life ...

Claims

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Application Information

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IPC IPC(8): C08L75/14C08K9/04C08K3/04
CPCC08K9/04C08K3/04
Inventor 张国平吴淑文孙蓉李金辉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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