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Preparation method of anti-oxidation coating of carbon aerogel composite material
The invention discloses a preparation method of a carbon aerogel composite material anti-oxidation coating, which comprises the following steps: preparing polycarbosilane (PCS) sol, carrying out vacuum impregnation on a carbon aerogel composite material by using the PCS sol, infiltrating PCS sol micromolecules into nanopores of the material, carrying out gel aging, normal-pressure drying and high-temperature cracking, and repeating the steps to obtain the carbon aerogel composite material anti-oxidation coating. A solvent and a catalyst in the carbon aerogel are volatilized, a polycarbosilane pyrolysis product (SiC) generates a thin and compact anti-oxidation coating on the surfaces of carbon particles, and the carbon aerogel composite material with SiC ceramic coatings inside and outside is obtained. The shape and performance of the material can be maintained in an aerobic environment at 1600 DEG C. The PCS sol has good wettability on the carbon aerogel composite material, not only can permeate into gaps between carbon aerogel and fibers, but also can permeate into nanopores of a carbon aerogel matrix to be adhered to carbon aerogel particles, and after high-temperature cracking, an anti-oxidation SiC ceramic coating is generated inside and outside the carbon aerogel composite material.
本发明公开了一种炭气凝胶复合材料抗氧化涂层的制备方法，通过配制聚碳硅烷(PCS)溶胶，将PCS溶胶真空浸渍炭气凝胶复合材料，使PCS溶胶小分子渗入到材料的纳米孔中，然后经过凝胶老化、常压干燥和高温裂解，并重复以上步骤，使得炭气凝胶内部的溶剂和催化剂挥发，聚碳硅烷高温裂解产物(SiC)在炭颗粒表面生成薄而致密的抗氧化涂层，得到内部和外部都有SiC陶瓷涂层的炭气凝胶复合材料。该材料能在1600℃的有氧环境保持其形状和性能。本发明PCS溶胶对炭气凝胶复合材料具有良好的浸润性，不仅可以渗透到炭气凝胶与纤维之间的空隙，还可以渗透到炭气凝胶基体的纳米孔中，粘附在炭气凝胶颗粒上，经过高温裂解后在炭气凝胶复合材料内外生成抗氧化SiC陶瓷涂层。
Preparation method of anti-oxidation coating of carbon aerogel composite material
The invention discloses a preparation method of a carbon aerogel composite material anti-oxidation coating, which comprises the following steps: preparing polycarbosilane (PCS) sol, carrying out vacuum impregnation on a carbon aerogel composite material by using the PCS sol, infiltrating PCS sol micromolecules into nanopores of the material, carrying out gel aging, normal-pressure drying and high-temperature cracking, and repeating the steps to obtain the carbon aerogel composite material anti-oxidation coating. A solvent and a catalyst in the carbon aerogel are volatilized, a polycarbosilane pyrolysis product (SiC) generates a thin and compact anti-oxidation coating on the surfaces of carbon particles, and the carbon aerogel composite material with SiC ceramic coatings inside and outside is obtained. The shape and performance of the material can be maintained in an aerobic environment at 1600 DEG C. The PCS sol has good wettability on the carbon aerogel composite material, not only can permeate into gaps between carbon aerogel and fibers, but also can permeate into nanopores of a carbon aerogel matrix to be adhered to carbon aerogel particles, and after high-temperature cracking, an anti-oxidation SiC ceramic coating is generated inside and outside the carbon aerogel composite material.
本发明公开了一种炭气凝胶复合材料抗氧化涂层的制备方法，通过配制聚碳硅烷(PCS)溶胶，将PCS溶胶真空浸渍炭气凝胶复合材料，使PCS溶胶小分子渗入到材料的纳米孔中，然后经过凝胶老化、常压干燥和高温裂解，并重复以上步骤，使得炭气凝胶内部的溶剂和催化剂挥发，聚碳硅烷高温裂解产物(SiC)在炭颗粒表面生成薄而致密的抗氧化涂层，得到内部和外部都有SiC陶瓷涂层的炭气凝胶复合材料。该材料能在1600℃的有氧环境保持其形状和性能。本发明PCS溶胶对炭气凝胶复合材料具有良好的浸润性，不仅可以渗透到炭气凝胶与纤维之间的空隙，还可以渗透到炭气凝胶基体的纳米孔中，粘附在炭气凝胶颗粒上，经过高温裂解后在炭气凝胶复合材料内外生成抗氧化SiC陶瓷涂层。
Preparation method of anti-oxidation coating of carbon aerogel composite material
一种炭气凝胶复合材料抗氧化涂层的制备方法
ZHANG HAIMING (author) / GUO JUNLI (author) / RAO XIONGHAI (author) / GUO HUI (author) / LI TIANCI (author) / WAN XIANG (author)
2024-06-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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