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SiO2/胶原水解物聚乙烯醇杂化复合膜的制备与性能

, PP. 59-63

Keywords: 杂化复合膜,聚乙烯醇,SiO2,胶原水解物,溶胀速率

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Abstract:

以正硅酸乙酯(TEOS)为前驱体,采用溶胶-凝胶法原位制备了SiO2/胶原水解物-聚乙烯醇杂化复合膜(SiO2/CH-PVA杂化膜)。通过溶胀、热重(TG)、红外光谱(FTIR)、扫描电镜(SEM)和拉伸实验,考察了SiO2对杂化膜性能的影响。结果表明,SiO2的引入减小了膜的平衡溶胀度,减缓了膜的溶胀速率,有效地抑制了胶原水解物的溶解。红外光谱中Si—O—Si、Si—C键的吸收峰表明形成了交联的有机聚合物/无机杂化体系,SiO2的引入显著地提高了杂化膜的热稳定性和力学性能,当SiO2质量分数由0%增加到20%,杂化膜的抗张强度由18MPa提高到25MPa,断裂伸长率由510%提高到780%。

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