任联振,任鹏刚,张晓亮

• 1:西安理工大学印刷包装工程学院

摘要(Abstract)：

为提高聚乙烯醇(PVA)水凝胶的力学性能,利用Na OH/尿素溶剂,通过物理交联循环冷冻-解冻法,制备了α-纤维素(α-CE)/PVA复合水凝胶。红外光谱,扫描电镜结果表明α-CE与PVA水凝胶基体形成互穿交联网状结构。研究发现α-CE与PVA分子链上的羟基间所形成的氢键使两者牢固结合。力学性能测试表明,复合水凝胶的力学性能得到了大幅度提高,当α-CE含量为4%(wt)时,复合水凝胶的拉伸强度以及在压缩型变量60%下的压缩应力分别由0.09和0.07 MPa提高到0.64和0.52 MPa,比纯PVA水凝胶提高了611%和643%。此外发现,α-CE能明显增强PVA水凝胶的弹性及压缩后的形变回复能力。

关键词(KeyWords)： 聚乙烯醇(PVA);α-纤维素;复合水凝胶;互穿网状结构;力学性能;形变回复能力

Abstract:

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基金项目(Foundation): 国家自然科学基金(51273161)

作者(Author): 任联振,任鹏刚,张晓亮

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