摘要
采用水溶液聚合方法合成了不同组成的丙烯酸-丙烯酰胺共聚物(P(AA-AM))。将聚乙烯醇(PVA)与所合成的P(AA-AM)共混,以戊二醛为交联剂,制备出了不同结构的PVA/P(AA-AM)复合水凝胶。采用扫描电镜观察了凝胶形貌,研究了复合水凝胶的结构与性能关系。结果表明,复合水凝胶溶胀性能与所用交联剂加量有关,复合水凝胶的溶胀度随着交联剂加量增加先增大后减小,在交联剂加量为0.5%时水凝胶溶胀度达到最大值。复合凝胶中的聚合物组成对溶胀度影响显著,随着P(AA-AM)含量提高,水凝胶的溶胀度逐渐增大。适当结构的复合水凝胶具有pH敏感性,敏感程度随着凝胶中P(AA-AM)含量的增加而增强。
P（AA-AM） copolymer based on acryl acid（AA） and acrylamide（AM） was synthesized by water solution polymerization with potassium peroxydisulfate and natrium sulfurosum as initiator, The PVA/P（AA-AM） composite hydrogel was prepared from aqueous solution containing PVA and P（AA-AM） by using glutaraldehyde as the crosslinker, the property and microcosmic structure of PVA/P （AA-AM） composite hydrogel was studied, The effects of crosslinker amount, P（AA-AM） content in PVA/P （AA-AM） hydrogels and pH on swelling ration were studied. The results show that the swelling ratio of hydrogels has the relationship with the crosslinker amount： the swelling ratio increases to the largest at 0. 596 glutaraldehyde and then reduces with the crosslinker amount increasing. P（AA-AM） amount in PVA/P（AA-AM） hydrogels has significant effect on the swelling ratio and pH sensitivity of hydrogels. The pH sensitivity of PVA/P（AA-AM） hydrogels increases with P（AA-AM） amount in the hydrogel.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第6期30-33,共4页
Polymer Materials Science & Engineering
基金
教育部长江学者和创新团队发展计划项目
