Graphene/SEBS composite material with high strength and high damping characteristic, and preparation method thereof

A composite material and graphene technology, which is applied in the field of graphene/SEBS composite material with high strength and high damping characteristics and its preparation, can solve the problems of high strength and high damping loss, and achieve enhanced mechanical properties and mechanical properties Excellent, improved energy dissipation effect

Active Publication Date: 2021-02-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reinforcement effect of graphene nanofillers, the energy consumption mechanism of interfacial slip and the energy consumption mechanism of dynamic breakage/generation of hydrogen

Method used

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  • Graphene/SEBS composite material with high strength and high damping characteristic, and preparation method thereof
  • Graphene/SEBS composite material with high strength and high damping characteristic, and preparation method thereof
  • Graphene/SEBS composite material with high strength and high damping characteristic, and preparation method thereof

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Experimental program
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preparation example Construction

[0033] The preparation method of the graphene / SEBS composite material of described high strength high damping characteristic, comprises the steps:

[0034] 1. Preparation of multiple hydrogen bond molecularly modified graphene

[0035] Using graphene oxide (GO) as a raw material, GO is dispersed in water to prepare a 0.05-3mg / ml aqueous dispersion of GO, and then multiple hydrogen bond molecules and 1-ethyl-(3-dimethylaminopropyl ) carbodiimide hydrochloride (EDC), ultrasonically dispersed for 0.5-1h, stirred at room temperature for 3-8h and stirred in an oil bath at 70-95°C for 1-4h to obtain GO modified by multiple hydrogen bond molecules; then add vitamin C, The mass is 3 to 10 times that of GO. After stirring and reacting at 25 to 70°C for 10 to 24 hours, the product is suction filtered and washed, and dried to obtain graphene modified by multiple hydrogen bond molecules.

[0036] For the sake of illustration, taking the typical triple hydrogen bond molecule 3-amino-1,2,4...

Embodiment 1

[0054] In the present embodiment, the preparation method of the graphene / SEBS composite material of high strength and high damping characteristic is as follows:

[0055] 1. Take GO prepared by electrolytic graphite oxide method, and prepare 100mL of GO / water dispersion with a concentration of 2mg / ml. The atomic ratio of oxygen in GO is 36%, and the GO sheet contains carboxyl, epoxy, hydroxyl and carbonyl functional groups , the diameter of the sheet is 100nm-3μm, and the number of sheets is a single layer. Weigh 2g of EDC and 0.3g of ATA and add them to the aqueous dispersion of GO, and disperse them by ultrasonic for 0.5h. The ultrasonic dispersion was placed in an Erlenmeyer flask, stirred and reacted under a constant temperature digital display magnetic stirrer, first stirred at room temperature for 6 hours, and then stirred and reacted in an oil bath at 90° C. for 2.5 hours.

[0056] 2. After the reaction is over, add 1 g of vitamin C to the above reaction solution, contin...

Embodiment 2

[0063] In the present embodiment, the preparation method of the graphene / SEBS composite material of high strength and high damping characteristic is as follows:

[0064] 1. Take the GO prepared by the Hummers chemical oxidation method and prepare 100 mL of GO / water dispersion with a concentration of 1 mg / ml. The atomic ratio of oxygen in GO is 45%, and the GO sheet contains carboxyl, epoxy, hydroxyl, and carbonyl functional groups , the diameter of the sheet is 1 μm to 5 μm, and the number of sheets is a single layer. Weigh 1 g of EDC and 0.3 g of ATA and add them to the aqueous dispersion of GO, and ultrasonically disperse for 0.5 h. The ultrasonic dispersion was placed in an Erlenmeyer flask, stirred and reacted under a constant temperature digital display magnetic stirrer, first stirred at room temperature for 6 hours, and then stirred and reacted in an oil bath at 85° C. for 3 hours.

[0065] 2. After the reaction is over, add 0.5g vitamin C to the above reaction solution,...

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Abstract

The invention relates to the field of nano carbon composite materials, particularly to a graphene/SEBS composite material with high-strength and high-damping characteristics, and a preparation methodof the graphene/SEBS composite material. The preparation method comprises the following steps: modifying multiple hydrogen bond molecules on the surface of graphene to obtain multiple hydrogen bond molecule grafted graphene nanofiller; introducing the multiple hydrogen bond molecules into an SEBS molecular chain segment through a grafting reaction to obtain SEBS grafted by the multiple hydrogen bond molecules; and finally mixing the multiple hydrogen bond molecule grafted graphene and SEBS in an organic solvent system by a solution blending method, uniformly stirring, removing the solvent, andcarrying out hot press molding to obtain the graphene/SEBS composite material. According to the invention, a hydrogen bond network is formed at the interface of each component in the composite material, and the graphene nanofiller and the hydrogen bond network synergistically play a role, so that the mechanical property of an SEBS matrix is remarkably enhanced, the viscoelastic damping property of the composite material is remarkably improved, and the graphene/SEBS composite material has an important application prospect in the field of high-performance damping engineering materials.

Description

technical field [0001] The invention relates to the field of nano-carbon composite materials, in particular to a graphene / SEBS composite material with high strength and high damping characteristics and a preparation method thereof. Background technique [0002] SEBS is a linear three-block copolymer with polystyrene as the end segment and ethylene-butene copolymer obtained by hydrogenation of polybutadiene as the middle segment. SEBS is a new type of elastomer similar to rubber. It not only has the excellent characteristics of thermoplastic elastomers, but also does not need to be vulcanized like rubber in the molding process. It has been used in many fields such as sporting goods, automotive materials, household appliances, and construction. Widely used and a lot of attention. At present, with the high efficiency, rapidity and automation of machinery and equipment, the problems of resonance, noise and material fatigue caused by mechanical vibration have become important pr...

Claims

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Application Information

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IPC IPC(8): C08L51/00C08K9/04C08K3/04
CPCC08K9/04C08K2201/011C08K3/042C08L51/006
Inventor 曾尤张藤心王函张建岗郝亚斌孙新阳
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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