Preparation method of carbon nanotube/nitrogen-doped modified fiber body composite material

Abstract

The invention provides a preparation method of a carbon nanotube / nitrogen-doped modified fiber body composite material. According to the preparation method, low-cost ceramic powder waste is used as amatrix raw material, and a biphase fiber body is cooperatively used as a reinforcing body, so a raw material source is cheaper, environment-friendly effect is achieved, the requirement of green industrialization is met, and the pressure of environmental governance is indirectly relieved. According to the structural characteristics of a three-dimensional fiber body, a compounding mode of complementation of double phases is created, and low-cost reagents such as cinnamamide and ethylene glycol monomethyl ether are introduced for surface modification and filling treatment on fibers and a precursor solution, so the interface bonding force and dispersing performance between different fibers are improved, the laminated compounding of aluminum silicate fiber cloth with a high melting point and good high-temperature resistance is realized, the defect of a single mechanical property of two-dimensional fiber cloth is effectively avoided, and a three-dimensional fiber composite system with double-phase fibers, resin and a cheap matrix and excellent mechanical properties is constructed.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method of a carbon nanotube / nitrogen-doped modified fiber body composite material. Background technique [0002] Since the 1980s, Europe, America, Japan and other countries have invested a lot of manpower and material resources to carry out research on the application of high-temperature oxide / oxide ceramic matrix composite materials. Most high-temperature oxide / oxide ceramic matrix composites use polycrystalline oxide fibers as reinforcements, which are roughly classified into aluminum silicate and mullite fibers, which have good elastic modulus and mechanical strength, but are easy to mix with matrix materials. The strong bonding reaction between the multi-phase interface reduces the mechanical properties of the material. Since the surface of the oxide fiber has a stable oxide layer as a package and protection, its heat resistance and oxidation resistance at h...

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Problems solved by technology

[0003] At present, high-temperature oxide / oxide ceramic matrix composites are mostly produced by the Sol-Gel method, and the production technology already has the ability to form one-dimensional textile threads, two-dimensional fiber cloth and three-dimensional complex shape fiber bodies, but the Sol-Gel method has The production cost is high and the preparation cycle is long, so the price of commercial high-performance fibers in the market is also high

The current ceramic matrix composites have not achieved low-cost control of the material structure, and the production mode is mainly based on the traditional ceramic production mode. The current research focuses on the heating system, the type of ceramic powder, the length of the fiber, In terms of fiber types and other factors, it is difficult to achieve a major technological breakthrough in a short period of time [Chen wen.Dynamic Mechanical and Thermal Properties of Cross-linked Fiber Composites[J].Journal of Wuhan University of Technology,2010,25(05):780- 784.]

[0004] In the past ten years, scientific researchers have tried to realize the preparation of O / OCMC fibers through various methods such as hydrosolvothermal method, spray pyrolysis method and electrospinning method, and have made certain progress in technology, but it is far from the mass production. There is still a large technical gap in low-cost production. How to improve the grain refinement process, design a stable multi-component phase structure, and achieve a uniform distribution of polycrystalline components in the fiber are currently technical difficulties that need to be overcome.

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