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材料工程  2015 

甲基硅油对有机硅防污涂层表界面特性的影响

DOI: 10.11868/j.issn.1001-4381.2015.04.011, PP. 59-65

Keywords: 有机硅,甲基硅油,涂层,性能,浸泡

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Abstract:

以羟基封端的聚二甲基硅氧烷为主要成膜物,添加不同分子量和添加量的甲基硅油制备有机硅防污涂料。结果表明甲基硅油的分子量越小、添加量越大,涂层的水接触角和二碘甲烷接触角越大,表面自由能越小;涂层的弹性模量随硅油分子量的减小而降低,在A组分中,硅油添加量占13%(质量分数,下同)时,弹性模量最小;附着生物的相对结合力随着硅油分子量的增加而增大,随着硅油含量的增加而降低;海水浸泡期间,硅油中的甲基与水分子发生氢键作用,从而使得甲基的峰位变宽,涂层的疏水性降低;所有涂层在空气中静置一年,只有添加分子量为1750甲基硅油的未浸泡海水涂层表面观测到硅油的渗出,且硅油渗出量与添加量成正比。

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