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A nanoparticle/graphene oxide composite modified polymer material and its preparation

A technology of graphene composite and polymer materials, which is applied in the field of nanoparticle/graphene oxide composite modified polymer materials and its preparation, can solve problems such as easy agglomeration, difficulty in large-scale production, harsh reaction conditions, etc., and achieve mechanical And excellent tribological properties, simple and efficient preparation method, excellent wear resistance and friction reduction performance

Active Publication Date: 2020-07-03
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nanoparticles have high surface activity and surface energy, and are prone to agglomeration when they are attached to the surface of graphene nanolayers, and there are many difficulties in traditional chemical preparation methods, such as harsh reaction conditions, high equipment costs, complicated processes, and many post-processing procedures , it is not easy to produce on a large scale, and the nanoparticles are easy to agglomerate on the outer layer of graphene, and it is difficult to fully exert the synergistic effect of nanoparticles and graphene when combined with a polymer matrix, so the application is greatly limited

Method used

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  • A nanoparticle/graphene oxide composite modified polymer material and its preparation
  • A nanoparticle/graphene oxide composite modified polymer material and its preparation
  • A nanoparticle/graphene oxide composite modified polymer material and its preparation

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preparation example Construction

[0030] The present invention further provides a method for preparing a nanoparticle / graphene oxide composite modified polymer material, comprising the following steps: (1) preparation of the nanoparticle and graphene oxide electrostatic self-assembly method: the nanoparticle is subjected to ultrasonic and mechanical Disperse into the solvent under stirring, add an appropriate amount of γ-aminopropyltriethoxysilane (KH550) dropwise to it, and then reflux in a water bath and mechanically stir to obtain an ionized positively charged amino-modified nanoparticle dispersion, add oxidation Graphene dispersion liquid, graphene oxide contains a large number of carboxyl groups, hydroxyl groups are ionized and negatively charged, ultrasonic and mechanical stirring treatment is fully contacted with positively and negatively charged amino-modified nanoparticles, and nanoparticles / graphene oxide composite particles are obtained;

[0031] (2) Wet-dry combined mixing: the nanoparticle / graphene...

Embodiment 1

[0038] Embodiment 1: a kind of preparation method of nanoparticle / graphene oxide composite modified polymer material, comprises the steps:

[0039] (1) ZrO 2 Electrostatic Self-Assembly Preparation of @GO Nanocomposite Particles: ZrO 2 Add nanoparticles into absolute ethanol, ultrasonically / mechanically stir (ultrasonic power is 80W, ultrasonic frequency is 40KHz, mechanical stirring speed is 1000rpm) to form a dispersion with a concentration of 10mg / mL, and 1mg / mL of γ-ammonia is added dropwise to it Propyltriethoxysilane (KH550) was treated with water bath reflux / mechanical stirring at 75°C for 4 hours to obtain ionized and positively charged amino-modified ZrO 2 Nanoparticle dispersion liquid, add GO dispersion liquid to it, make ZrO contained in the mixed solution 2 The mass ratio of GO to GO is 50:1. GO contains a large number of carboxyl groups and hydroxyl groups are ionized and negatively charged. Ultrasonic / mechanical stirring treatment makes the positive and negati...

Embodiment 2

[0047] Embodiment 2: Its preparation method of a kind of nanoparticle / graphene oxide composite modified macromolecule material, comprises the following steps:

[0048] (1) ZrO 2 Electrostatic Self-Assembly Preparation of @GO Nanocomposite Particles: ZrO 2 Add nanoparticles into absolute ethanol, ultrasonic / mechanical stirring (ultrasonic power is 80W, ultrasonic frequency is 40KHz, mechanical stirring speed is 1000rpm) to form a dispersion with a concentration of 20mg / mL, and 4mg / mL of γ-ammonia is added dropwise to it Propyltriethoxysilane (KH550) was treated with reflux / mechanical stirring at 75°C for 10 hours to obtain ionized and positively charged amino-modified ZrO 2 Nanoparticle dispersion liquid, add GO dispersion liquid to it, make ZrO contained in the mixed solution 2 The mass ratio to GO is 60:1. GO contains a large number of carboxyl groups and hydroxyl groups are ionized and negatively charged. Ultrasonic / mechanical stirring treatment makes the positively and ne...

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Abstract

The invention belongs to the field of high polymer composites and particularly relates to a nanoparticle / graphene oxide composite modified high polymer material and a preparation method thereof. The composite is prepared from nanoparticle / graphene oxide composite particles and a macromolecular polymer matrix, wherein the nanoparticle / graphene oxide composite particles are synthesized with an electrostatic self-assembly method, that is, an amino modified nanoparticle dispersion liquid is ionized to have positive charges while graphene oxide contains a large quantity of carboxyls and hydroxyls and is ionized to have negative charges, particles with positive and negative charges are sufficiently contacted, and electrostatically self-assembled nanoparticle and graphene oxide composite particles are obtained. The prepared nanoparticle / graphene oxide composite modified high polymer material has excellent mechanical and tribological performance, is simple and efficient to prepare and has goodapplication prospects in automobiles, aerospace, electronic and electrical engineering, machinery, weapons and other fields.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, in particular to a nanoparticle / graphene oxide composite modified polymer material and its preparation. Background technique [0002] Graphene not only has excellent chemical and thermal stability, superior electrical, thermal and mechanical properties, and ultra-high specific surface area, but also has excellent tribological properties. Due to the small shear force between graphene sheets, Therefore, it can be used as a filler for high-performance anti-friction and lubricating composite materials, and has broad application prospects in the field of polymer composite materials. Utilizing the unique two-dimensional structure of graphene, attaching nanoparticles to the surface of graphene nanolayers to synthesize graphene-based nanocomposites, nanoparticles can be used to play the role of "rolling bearing" in the friction process; The surface layer can carry a greater load and has a repa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L79/08C08L63/00C08L83/04C08L23/06C08L61/16C08L81/02C08K9/06C08K3/22C08K3/30C08K3/04C08K3/36
CPCC08K3/04C08K3/22C08K3/30C08K3/36C08K9/06C08K2003/2227C08K2003/2241C08K2003/2244C08K2003/3009C08K2201/011C08L61/06C08L79/08C08L63/00C08L83/04C08L23/06C08L61/16C08L81/02
Inventor 刘亚青周少锋王书展王军杰赵贵哲
Owner ZHONGBEI UNIV
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