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Composite particle with multiple core-shell structures and preparation method thereof

A composite particle and shell structure technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of impurities destroying the graphene structure of the modified layer, increasing the interface resistance of conductive materials, low synthesis efficiency, etc., and achieving a simple preparation process and a matrix. The effect of good compatibility, high thermal and dimensional stability

Active Publication Date: 2018-09-18
CGN JUNER NEW MATERIALS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this is often easy to bring in impurities and destroy the graphene structure of the modified layer, increase the interface resistance of conductive materials, affect the final performance, and the synthesis efficiency is low

Method used

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  • Composite particle with multiple core-shell structures and preparation method thereof
  • Composite particle with multiple core-shell structures and preparation method thereof
  • Composite particle with multiple core-shell structures and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] (1) Synthesis of nano-silica:

[0060] Pour 140 mL of absolute ethanol, 20 mL of ammonia water and 14 mL of ethyl orthosilicate into a three-necked flask, and stir at 30° C. for 20 hours at 500 rpm. After centrifugal purification with deionized water until the pH is 7, adding an appropriate amount of deionized water to obtain a nano-silica suspension with a concentration of 10g / L, the particle size of the nano-silica is ~ 250nm, and the resulting nano-silica The scanning electron microscope appearance is as figure 1 shown.

[0061] (2) Carry out pretreatment to the surface of nano silicon dioxide:

[0062] Add 0.05g of γ-(methacryloyloxy)propyltrimethoxysilane to 100mL of nano-silica suspension (concentration: 10g / L), stir at 200 rpm at room temperature for 4 hours, then continue to Stir for 2 hours. The modified nano-silica was subjected to ethanol centrifugation and purification (the speed was 4000 rpm, the single time was 15 minutes, and the number of times was 3...

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Abstract

The invention discloses a composite particle with multiple core-shell structures. The composite particle uses inorganic silica nanoparticles as a core, uses an organic acrylate polymer as a middle layer, and uses a carbon nanotube adsorption layer as a shell. The invention also discloses a preparation method for the composite particle, first nano-silica is synthesized through a Stober method, thenthe surface of nano-silica is coated with an acrylate polymer layer based on a dispersion polymerization method, and an initiator that can be subjected to hydrolytic ionization is used to achieve coating of the nano silica surface with the polymer and charge modification in one step, then further carbon nanotubes are adsorbed through electrostatic self-assembly. The invention provides the composite particle with multiple core-shell structures and the preparation method thereof, the preparation process is green and efficient, and does not need complicated functional modification, and the prepared composite particle has excellent overall performance.

Description

technical field [0001] The invention relates to the technical field of multifunctional nanocomposite particles, in particular to a composite particle with multiple core-shell structures and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, nanomaterials are playing an increasingly important role in the development of new materials. Due to low density (40~200kg / m 3 ), high specific surface area (400~1500m 2 / g) and low thermal conductivity (0.02W / m / K) and other excellent physical and chemical properties, nano-silica particles have been widely used in the fields of high-efficiency insulation materials, high-strength materials and gas adsorption materials. Similarly, since the discovery of Japanese scientist Iijima in 1991, carbon nanotubes, as a new type of one-dimensional functional material, have also attracted the attention of researchers. Carbon nanotubes have a high aspect ratio and hollow structure, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C08F120/14C08F2/44C08K9/06C08K3/36
CPCB01J13/14C08F2/44C08F120/14C08K3/36C08K9/06C08K2201/011
Inventor 叶文琼陈晓敏黄瑞杰郑京连姜小龙王浩周国剑贾征远张正
Owner CGN JUNER NEW MATERIALS
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