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A kind of nanocomposite material and preparation method thereof

A nanocomposite material and self-healing technology, applied in the field of nanocomposite materials and their preparation, can solve problems such as low self-repairing efficiency and achieve the effect of improving mechanical properties

Active Publication Date: 2021-07-23
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[ACS Macro Lett.2016,5,1196-1200] reported a dielectric silicon elastomer actuator consisting of an ionically cross-linked interpenetrating polymer network, and the material has some self-healing properties after electrical breakdown capability, but less than 50% self-healing efficiency

Method used

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  • A kind of nanocomposite material and preparation method thereof
  • A kind of nanocomposite material and preparation method thereof
  • A kind of nanocomposite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1: Under the protection of an inert atmosphere, the molecular weight of 2000g mol -1 Hydroxyl-terminated polytetrahydrofuran (4.0 g) and N,N-dimethylformamide (DMF) (15 g) were thoroughly mixed, and the mixed solution was added into a three-necked flask at room temperature.

[0058] Step 2: Under the protection of an inert atmosphere, diphenylmethane diisocyanate (MDI) (1.050 g) and DMF (10 g) were mixed at room temperature.

[0059] Step 3: Under the protection of an inert atmosphere, add the mixed solution in Step 2 to the mixed solution in Step 1 through an atmospheric funnel. React at 80°C for 3h under nitrogen atmosphere.

[0060] Step 4: Under the protection of an inert atmosphere, 0.75g of bismaleimide (BMI) and 0.40g of furfuryl alcohol (FA) were mixed with 9.6g of DMF, and heated in an oven at 70° C. for 3 hours to obtain the repaired part.

[0061] Step 5: under the protection of an inert atmosphere, add the repaired part as a chain extender to the prod...

Embodiment 2

[0069] Step 1: Under the protection of an inert atmosphere, the molecular weight of 2000g mol -1 Hydroxyl-terminated polytetrahydrofuran (2.0 g) and N,N-dimethylformamide (DMF) (7.5 g) were thoroughly mixed, and the mixed solution was added into a three-necked flask at room temperature.

[0070] Step 2: Under the protection of an inert atmosphere, diphenylmethane diisocyanate (MDI) (0.500 g) and DMF (5.0 g) were mixed at room temperature.

[0071] Step 3: Under the protection of an inert atmosphere, add the mixed solution in Step 2 to the mixed solution in Step 1 through an atmospheric funnel. React at 85°C for 2h under nitrogen atmosphere.

[0072] Step 4: Under the protection of an inert atmosphere, 0.375g of bismaleimide (BMI) and 0.20g of furfuryl alcohol (FA) were mixed with 4.8g of DMF, and heated in an oven at 70° C. for 3 hours to obtain the repaired part.

[0073] Step 5: Under the protection of an inert atmosphere, add the repaired part as a chain extender to the p...

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Abstract

The invention relates to a nanocomposite material and a preparation method thereof, and specifically discloses a method for preparing a nanocomposite material with self-healing properties, comprising the following steps: (1) reacting high polymer polyols with polyisocyanate to obtain two End-NCO-terminated polyurethane prepolymer; (2) adding self-healing functional molecules to two-end-NCO-terminated polyurethane prepolymer, heating and reacting to obtain a polyurethane matrix with repairing properties; (3) adding filler to the polyurethane prepolymer with repairing properties In the polyurethane matrix with repair performance, a nanocomposite mixed solution is prepared; (4) the solution is removed to obtain a composite material. The nanocomposite material of the invention can be self-repaired by heating, and the dielectric properties and mechanical properties are well recovered after self-repair.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a nanocomposite material, a preparation method and a self-repairing method thereof. Background technique [0002] With the development of electronic information technology, especially the rapid development of wearable electronics, smart phones, ultra-thin computers, unmanned driving, Internet of Things technology and 5G communication technology in recent years, the miniaturization and thinning of electronic systems , multi-functional, high performance and other aspects have put forward higher and higher requirements. Insulating dielectric material is an important material in electronic packaging technology. The higher its dielectric constant is, the more favorable it is to the miniaturization of electronic products. In high-frequency and high-speed applications, in order to reduce the loss of the signal transmission process, it is required to have low dielectric loss....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L75/08C08K3/22C08K3/24
CPCC08J5/18C08J2375/08C08K3/24C08K2003/2241C08K2201/011
Inventor 于淑会吴旭东孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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