Preparation method of carbon nanotube (CNT) enhanced SiC based nano composite material film

A nanocomposite material and carbon nanotube technology are applied in the field of preparation of carbon nanotube reinforced SiC-based nanocomposite material films, which can solve the problems of increasing the complexity of the experimental process, little effect of strengthening and toughening, and damage to carbon nanotubes. , to achieve the effects of excellent thermal and electrical conductivity, good dispersion, and improved bonding strength

Active Publication Date: 2015-01-21
XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Chemical inertness maintains the high oxidation resistance of CNTs; however, chemical inertness also hinders the processing and application of this material
At present, the combination of carbon nanotubes and ceramics is used to improve the strength and toughness of ceramic materials. Most of the test results are disappointing. For the reports of carbon nanotubes / ceramic materials, the effect of carbon nanotubes on the strengthening and toughening of ceramics is little or even No performance improvement due to weak adhesion between carbon nanotubes and ceramics
Acid treatment and chemical modification of carbon nanotubes can improve the adhesion between carbon nanotubes and ceramic substrates, but acid treatment will eventually damage carbon nanotubes and increase the complexity of the experimental process

Method used

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  • Preparation method of carbon nanotube (CNT) enhanced SiC based nano composite material film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1) 2g CNTs, 1g B 4 C micropowder and 3.5g of amorphous elemental silicon powder are dispersed in 1000ml of distilled water, and 0.9ml of surfactant Triton is added dropwise. TM X-100, disperse by pulse ultrasonic for 50min to obtain a dispersed, uniform and stable suspension; among them, the diameter of CNTs is about 20nm, the length is >50μm, and the density is 2.10g / cm 3 ;B 4 The particle size of C micropowder is 1~2μm, and the density is 2.52g / cm 3 ; The particle size of amorphous elemental silicon powder is 1-7μm, and the density is 2.34g / cm 3 . In addition, the period of pulsed ultrasound is 1min, and the interval of every 45s of ultrasound is 15s, the frequency of ultrasonic vibration is 20kHz, and the power is 1300W.

[0062] 2) Microporous membrane 5 (Isopore TM Membrane Filters) are tiled on the metal filter screen 6 in the pressurized filter device, and the metal filter screen 6 is placed under the microporous filter membrane 5 to support and protect th...

Embodiment 2

[0071] 1) 3g of CNTs, 1.5g of B 4 C micropowder and 5g of amorphous elemental silicon powder are dispersed in 1000ml of distilled water, and 1.3ml of surfactant Triton is added dropwise TM X-100, homogenized by pulsed ultrasonic dispersion for 1 hour to obtain a dispersed, uniform and stable suspension; among them, the diameter of CNTs is about 20nm, the length is >50μm, and the density is 2.10g / cm 3 ;B 4 The particle size of C micropowder is 1~2μm, and the density is 2.52g / cm 3 ; The particle size of amorphous elemental silicon powder is 1-7μm, and the density is 2.34g / cm 3 ; In addition, the period of pulse ultrasound is 1min, and every 45s interval of ultrasound is 15s, the frequency of ultrasound vibration is 20kHz, and the power is 1370W.

[0072] 2) Microporous membrane 5 (Isopore TMMembrane Filters) are tiled on the metal filter screen 6 in the pressurized filter device, and the metal filter screen 6 is placed under the microporous filter membrane 5 to support and ...

Embodiment 3

[0081] 1) 1g of CNTs, 0.5g of B 4 C micropowder and 1g of amorphous elemental silicon powder are dispersed in 1000ml of distilled water, and 0.5ml of surfactant Triton is added dropwise TM X-100, disperse by pulse ultrasonic for 40 minutes to make it uniform, and obtain a dispersed, uniform and stable suspension; among them, the diameter of CNTs is about 20nm, the length is > 50μm, and the density is 2.10g / cm 3 ;B 4 The particle size of C micropowder is 1~2μm, and the density is 2.52g / cm 3 ; The particle size of amorphous elemental silicon powder is 1-7μm, and the density is 2.34g / cm 3 . In addition, the period of pulsed ultrasound is 1min, and the interval of every 45s of ultrasound is 15s, the frequency of ultrasonic vibration is 20kHz, and the power is 1400W.

[0082] 2) Microporous membrane 5 (Isopore TM Membrane Filters) are tiled on the metal filter screen 6 in the pressurized filter device, and the metal filter screen 6 is placed under the microporous filter memb...

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Abstract

The invention discloses a preparation method of a carbon nanotube (CNT) enhanced SiC based nano composite material film. The preparation method comprises the following steps: dispersing CNTs, B4C micro-powder and elemental silicon powder into water to prepare a suspension liquid, taking TritonTM X-100 as a dispersing agent, then performing pressure filtration on the suspension liquid by using a pressure filtration device, soaking a CNTs Buckypaper preform obtained by virtue of pressure filtration in a thermoplastic phenolic resin solution, and then sequentially performing soft curing, hard curing and post-curing to obtain a curing sample; and then carbonizing the curing sample under the protection of nitrogen, and finally sintering to obtain the CNT enhanced SiC based nano composite material film. The nano composite material film prepared by using the method disclosed by the invention is high in CNT volume content and good in dispersion performance, has good preferred orientation in arrangement of the CNTs, has good combination between the CNTs and a matrix, and is smooth and warping-free in film surface, uniform and compact in microscopic structure, good in thermal and electrical conduction properties, good in strength and toughness, short in period and low in cost.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and in particular relates to a method for preparing a carbon nanotube-reinforced SiC-based nanocomposite film. Background technique [0002] Carbon nanotubes (CNTs) are lightweight materials with excellent mechanical, electrical and thermal properties. One of the most promising applications of CNTs is the development of nanocomposites. CNTs have a large number of potential applications due to their very large aspect ratio (1000-10,000), low density, high stiffness (Young's modulus is about 1TPa), and high tensile strength (up to 60GPa). Moreover, CNTs also have excellent thermal conductivity (at room temperature along the axial direction, a single single-wall carbon nanotube (Single Wall Carbon nanotube, SWCNT), 6600W / mK; a single multi-wall carbon nanotube (Multi-wall carbon nanotube) , MWCNT), >3000W / mK) and excellent electrical conductivity (at room temperature along the axial direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/622
CPCC04B35/591C04B2235/3821C04B2235/428C04B2235/5288C04B2235/6562C04B2235/6567C04B2235/658
Inventor 蔡艳芝尹洪峰周媛钟兴润
Owner XIAN XINGUI CERAMIC COMPOSITE MATERIAL CO LTD
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