A kind of preparation method of flexible ablation-resistant composite material
A composite material and ablation-resistant technology, which is applied in the field of composite materials, can solve the problems of poor ablation resistance and achieve good ablation resistance and excellent heat resistance
Active Publication Date: 2021-06-15
SICHUAN UNIV
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Problems solved by technology
With the development of aerospace vehicles towards faster speed, stronger maneuverability and more complex structure, traditional rigid heat-resistant and anti-ablation materials cannot fully meet the application requirements, and flexible anti-ablation materials are playing an increasingly important role. It also plays an increasingly important role in thermal protection and sealing of some dynamic and complex connection structures, as well as large deformation and thermal stress matching, but conventional flexible materials have poor ablation resistance
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Embodiment 1～4
[0028] Embodiment 1~4, the preparation of flexible ablation-resistant composite material of the present invention
[0029] 1. Raw material ratio
[0030] Table 1 Raw Material Proportion of Embodiments 1 to 4 of the present invention
[0031] Raw materials (parts) Example 1 Example 2 Example 3 Example 4 Silicone Rubber 100 100 100 100 Aramid fiber 12 12 12 12 expanded hollow microspheres 30 40 50 60 Hardener 3 3 3 3 catalyst 0.2 0.2 0.2 0.2
[0032] In Table 1, the silicone rubber is room temperature vulcanized liquid silicone rubber modified by epoxy resin, and its preparation method is as follows: add bisphenol A type epoxy resin and silicone The intermediate polymethylphenylsiloxane, after feeding nitrogen, start the stirring device and raise the temperature to 105 ° C ~ 155 ° C, after the two are evenly mixed, then drop 0.1wt.% ~ 0.9wt.% titanic acid Tetraisopropyl ester (TPT), the amount of TPT is 0.1-0.9...
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Abstract
The invention provides a method for preparing a flexible ablation-resistant composite material. The flexible ablation-resistant composite material is prepared from raw materials in the following weight ratio: 100 parts of silicone rubber, 3-20 parts of fiber, 5-80 parts 1 part of thermoplastic hollow microspheres, 2-10 parts of curing agent, and 0.2-2 parts of catalyst. The flexible ablation-resistant composite material prepared by the invention has excellent heat resistance, ablation resistance and good heat insulation performance, and can be used to prepare ablation heat-resistant materials and parts with heat-resistant and ablation-resistant performance requirements, and is used in Protection and sealing of structures and components in aerospace vehicles and related equipment that need to withstand harsh environments such as high-temperature gas and aerodynamic heat flow.
Description
technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a flexible ablation-resistant composite material. Background technique [0002] Under the condition of gas erosion, ablation-resistant materials undergo a series of physical and chemical reactions, such as pyrolysis heat absorption, mass injection effect of pyrolysis gas, re-radiation of surface carbon layer, etc., which can take away a large amount of heat and reduce The role of protecting the temperature of materials and preventing further ablation damage of materials, ablation heat-resistant materials play an irreplaceable key role in aerospace vehicles. With the development of aerospace vehicles towards faster speed, stronger maneuverability and more complex structure, traditional rigid heat-resistant and anti-ablation materials cannot fully meet the application requirements, and flexible anti-ablation materials are playing an increasingly important r...
Claims
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IPC IPC(8): C08L83/04C08L83/10C08L77/10C08G77/42C08J9/236
Inventor 邹华维闫丽伟梁梅陈洋周成
Owner SICHUAN UNIV