通过硅酸钠在酸催化作用下与聚乙烯醇(PVA)反应制备有机-无机复合涂层,改善聚乙烯醇的耐水性.研究了酸种类、硅酸钠用量和热处理温度对复合涂层耐水性的影响.通过红外光谱(FI-TR)、X射线衍射(XRD)、差示扫描量热(DSC)、热重分析(TGA)对复合涂层结构进行了表征.结果表明:硅酸钠与PVA发生交联,PVA结晶度下降,热分解温度提高;随着硅酸钠用量增加,涂层耐水性先提高后下降;选用磷酸作为催化剂,热处理温度在120-140℃较为合适,复合涂层具有较好的耐水性.
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