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A kind of preparation method of carbon nanotube coated silica microsphere composite nanomaterial

A technology of composite nanomaterials and carbon nanotubes, which is applied in the field of metal matrix composite materials preparation, can solve the problems of few researches on carbon nanotubes coated with nanometer microspheres, and achieve the effects of low density, low cost and good elasticity and plasticity

Active Publication Date: 2021-05-25
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Existing patent methods are mainly for SiO 2 Research on coated carbon nanotubes, for SiO 2 There is still little research on carbon nanotubes coated with nanospheres

Method used

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  • A kind of preparation method of carbon nanotube coated silica microsphere composite nanomaterial
  • A kind of preparation method of carbon nanotube coated silica microsphere composite nanomaterial
  • A kind of preparation method of carbon nanotube coated silica microsphere composite nanomaterial

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Step 1, add absolute ethanol, deionized water and ammonia solution with a mass concentration of 25% in a volume ratio of 50:1:3 to a 250ml three-necked bottle, stir in a water bath at 25°C at a speed of 250rpm After the stirring started, add ethyl orthosilicate (the volume ratio of ethyl orthosilicate to absolute ethanol is 3:50) into the three-necked bottle, react for 6 hours, let it stand for 20 minutes, and then centrifuge at 8000rpm for 10 minutes , remove the upper clear night, wash once with ethanol, wash twice with water, and dry at 60°C to obtain SiO 2 nanospheres.

[0048] The SiO obtained in this step 2 SEM micrographs of the microspheres figure 2 Shown, SiO 2 The microspheres are regular spheres with smooth surfaces and uniform sizes, with diameters ranging from 400 to 500 nm.

[0049] Step 2, the nano-SiO 2 The microspheres were added to the CTAB solution with a mass concentration of 2% (nano-SiO 2 The mass volume ratio of the microspheres to the CTAB...

Embodiment 2

[0055] Step 1, add absolute ethanol, deionized water and ammonia solution with a mass concentration of 26% in a volume ratio of 50:10:3 to a 250ml three-neck bottle, stir in a water bath at 26°C at a speed of 255rpm After stirring, add ethyl orthosilicate (the volume ratio of ethyl orthosilicate to absolute ethanol is 3:51) into the three-necked bottle, react for 6.5 hours, let it stand for 22 minutes, and then centrifuge at 8500rpm 10min, remove the upper clear night, wash with ethanol twice, wash with water three times, and dry at 60°C to obtain SiO 2 nanospheres.

[0056] Step 2, the nano-SiO 2 The microspheres were added to the CTAB solution with a mass concentration of 2.2% (nano-SiO 2 The mass volume ratio of the microspheres to the CTAB aqueous solution is 1.1g / 300ml), after stirring with a magnetic stirrer at room temperature for 26min, ultrasonically disperse at 42°C for 1.5h, and after standing for 3.5h, pass N 2Carry out reflux stirring, add MMA monomer and initi...

Embodiment 3

[0061] Step 1, add absolute ethanol, deionized water and ammonia solution with a mass concentration of 27% in a volume ratio of 60:1:3 to a 250ml three-necked bottle, stir in a water bath at 27°C at a speed of 270rpm After the stirring started, add tetraethyl orthosilicate (the volume ratio of tetraethyl orthosilicate to absolute ethanol is 3:52) into the three-necked flask, react for 7 hours, let it stand for 25 minutes, and then centrifuge at 9000rpm for 8 minutes , remove the upper clear night, wash once with ethanol, wash three times with water, and dry at 65°C to obtain SiO 2 nanospheres.

[0062] Step 2, the nano-SiO 2 The microspheres were added to the CTAB solution with a mass concentration of 2.5% (nano-SiO 2 The mass volume ratio of the microspheres to the CTAB aqueous solution is 1.2g / 300ml), after stirring with a magnetic stirrer at room temperature for 27min, ultrasonically disperse at 45°C for 1h, let it stand for 4h, and then inject N 2 Carry out reflux stirr...

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Abstract

The invention discloses a preparation method of a carbon nanotube-coated silica microsphere composite nanomaterial, specifically: using SiO 2 Nano-microspheres are used as templates, which are dispersed in cationic surfactants, and then MMA monomer is added to form SiO by seed emulsion polymerization. 2 as the core and PMMA as the shell; then the PMMA-modified CNT is coated on the outermost layer of the nanocomposite particle by hydrothermal reaction, and the excess PMMA is removed to obtain the CNT-coated SiO 2 Nanomaterials with a core-shell structure formed by nanospheres. The invention uses polymer PMMA as an intermediate bridge to prepare CNT-coated SiO 2 Microsphere composite nanomaterials, the obtained composite nanomaterials have the characteristics of low density, high strength, and good elasticity and plasticity. In addition, the present invention has simple operation and low cost, and the prepared CNT-coated SiO 2 The formed nano-microspheres with core-shell structure are uniform in shape and size.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite material preparation, and in particular relates to a method for preparing a carbon nanotube-coated silicon dioxide microsphere composite nanomaterial. Background technique [0002] Carbon nanotube (CNT) is a one-dimensional quantum material with a special structure. Carbon nanotubes are mainly composed of carbon atoms arranged in hexagons to form coaxial circular tubes with several to dozens of layers; The fixed distance is about 0.34nm, and the diameter is generally several nanometers to tens of nanometers. Carbon nanotubes are completely composed of carbon atoms, with few defects, low density, strong axial strength and rigidity, and their performance is better than that of general-purpose carbon fibers. As a new type of nanomaterial, carbon nanotubes have a network structure formed by interconnecting carbon hexagons, which have many abnormal mechanical, electrical and chemical pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12B82Y40/00B82Y30/00C01B32/168
CPCB82Y30/00B82Y40/00C01B33/12C01P2004/03C01P2004/32C01P2004/62C01P2004/80C01B32/168
Inventor 程有亮张小强方长青
Owner XIAN UNIV OF TECH
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