陶瓷前驱体基防潮涂层制备及其性能表征

以全氢硅氮烷树脂为成膜物,以纳米Si O_2为填料,在石英织物表面制备出了防潮性能优良的陶瓷前驱体基防潮涂层。采用SEM、EDS、IR、DSC-TG等研究了防潮涂层在固化和高温加热过程中的结构变化,测试了其防潮性能。结果表明,在40℃、95%湿度环境下放置24 h,该防潮涂层可将石英织物的吸潮率从11.71%降到0.31%,且涂层主要组分与石英织物基材组分一致,因而其无线电波透过能力与石英织物基材相近。

Preparation and Characterization of Ceramic PrecursorBased Moisture Resistance Coating

The moisture resistance coating was fabricated on the silica fabric composite using perhydropolysilazane

and nano silica as starting materials. The structural revolution of the moisture resistance coating in the solidifying and

high temperature heating processes was studied by SEM, EDS, IR, DSC TG. It is found that the moisture absorption

percentage of the silica fabric composite at the temperature of 40 and humidity of 95% for 24 h decreased from 11.

71% to 0.31% due to the moisture resistance coating. The radio wave transmissivity of the moisture resistance coating

is close to that of the silica fabric composite due to its similar constituents to the silica fabric composite.