A high-strength and high-temperature-resistant nano-carbon composite material and its preparation method and application
A composite material and high temperature resistant technology, applied in the field of nano-carbon composite materials and their preparation, and nano-carbon composite materials, can solve the problems of high requirements for preparation process conditions, unfavorable wide application of composite films, etc., and achieves easy availability of raw materials and easy scale. The effect of simple production and equipment
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[0049] Another aspect of the embodiment of the present invention provides a method for preparing a high-strength and high-temperature-resistant nano-carbon composite material, which includes: using a carbon material aggregation network structure as a filter body, filtering the selected substance and / or the selected substance precursor Filtrating the liquid phase system of the body, or immersing the carbon material aggregation network structure in the liquid phase system containing the selected substance and / or the precursor of the selected substance;
[0050] Curing the aggregated network structure of the carbon material with the selected substance and / or the precursor of the selected substance distributed on the surface and inside, to obtain the high-strength and high-temperature-resistant nano-carbon composite material.
[0051] Further, the liquid phase system is a dispersion of the selected substance; or, the liquid phase system is a solution of a precursor of the selected ...
Embodiment 1
[0075] see figure 1 As shown, some more specific embodiments of the present invention relate to a class of CNT (abbreviation for carbon nanotube) / SiO 2 The preparation method of composite film, it may comprise the steps:
[0076] The mass fraction of different capacities was 14% SiO 2 The solution is suction filtered on the carbon nanotube film to form a coating layer, and then put into an oven and cured at 200°C for 0.5 hours to obtain CNT / SiO with different mass fractions (25%-80%) 2 composite film. For example, 2ml mass fraction is 14% SiO 2 The solution can obtain CNT / SiO with a CNT mass fraction of 55% 2 composite film, the CNT / SiO 2 The mechanical properties of the composite film at room temperature are as follows: Figure 2a As shown, it can be found that the Young's modulus is three times the original, and the tensile strength is more than twice the original, which is due to the fact that the carbon nanotubes in the carbon nanotube film are covered by a thinner c...
Embodiment 2
[0084] The mass fraction of different capacities was 20% TiO 2 The solution is suction filtered on the carbon nanotube film to form a coating layer, and then put into an oven and cured at 400°C for 1 hour to obtain CNT / TiO with different mass fractions (25%-80%) 2 composite film. For example, 2ml mass fraction is 20% TiO 2The solution can obtain CNT / TiO with a CNT mass fraction of 55% 2 composite film, the CNT / TiO 2 The mechanical properties of the composite film at room temperature have been improved. This is because the carbon nanotubes in the carbon nanotube film are covered by a thinner ceramic layer, especially at the overlap of the carbon nanotubes, thus improving the carbon nanotube thickness. Mechanical properties of the film; carbon nanotube films treated with TiO 2 After compounding, the ductile fracture characteristics are still retained, and the brittle fracture characteristics of ceramic materials are not fully displayed. Modified CNT / TiO 2 The composite fil...
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