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In this study, a superhydrophobic sol gel (SHSG) was used to promote self-cleaning ability of canvas. Four kinds of coating methods were studied and water impact test was used to assess the quality of the coating. The scraper method rendered a relatively flat surface; and water contact angles (WCAs) of two bilayers polytetrafluoroethylene (PTFE)/SHSG-coated canvas were 153.3°±3.1° and 141.7°±3.3°...
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