仿贻贝类含儿茶酚改性聚乙烯醇黏附凝胶的合成  

Synthesis of mussel-inspired polyvinyl alcohol adhesive gel

作　　者：杨潇[1] 贾二鹏[2] 易世雄[1] 冉小琪[3] 

机构地区：[1]西南大学纺织服装学院,重庆400716 [2]四川大学高分子科学与工程学院,成都610036 [3]西南大学化学化工学院,重庆400716

出　　处：《功能材料》2015年第15期15016-15020,共5页Journal of Functional Materials

基　　金：国家自然科学青年基金资助项目(51303150)

摘　　要：将儿茶酚(catechol)接枝到聚乙烯醇(PVA)侧基上,得到改性聚乙烯醇(m-PVA),以模拟贻贝类分泌的黏附蛋白液。通过(UV-spectra)、(FT-IR)及(H1NMR)证实了m-PVA的大分子结构,并计算出接枝率大约为10%。此外,通过热失重分析(TG)表征了mPVA的热稳定性能。对于模拟贻贝类黏附凝胶的形成机理,通过UV-spectra研究了m-PVA在不同p H值条件下对三价铁离子(Fe3+)的络合作用及所形成的黏附凝胶,以及在高碘酸钠(Na IO4)的氧化下,通过化学交联得到的具有黏附性质的凝胶。通过本文的初步研究,最终合成出具有一定黏附性质的m-PVA凝胶,在一定程度上对贻贝类黏附凝胶进行了仿生。In this work,we grafted polyvinyl alcohol( PVA) with a functionality of adhesive structure,3,4-dihydroxybenzaldehyde,to obtain a mussel-inspired modified PVA( m-PVA). Firstly,m-PVA was synthesized with PVA and 3,4-dihydroxybenzaldehyde via acetalization. The m-PVA was characterized by UV-spectra,FT-IR and H1 NMR,which confirmed the catechol was grafted in the polymer. And the grafting ratio is about 10%. In addition,the thermal stability of m-PVA was also measured by TG analysis method. For mimic of mussel adhesive protein gel,UV-spectra were used to study the formation of m-PVA adhesive gel,which was obtained by coordinating with Fe3 +with different p H. UV-spectra were also used to investigate the formation of m-PVA adhesive gel,which formed by oxidation of Na IO4 that can oxidize the catechol to form quinone. Through our primary work,adhesive gel was synthesized successively,which mimics mussel adhesive protein gel to some extent.

关 键 词：贻贝 仿生 黏附 聚乙烯醇 

分 类 号：TB34[一般工业技术—材料科学与工程]