基于电荷相互作用的仿贻贝高性能黏合凝胶  

Mussel-Inspired High-Performance Adhesive Hydrogels Constructed through Charge Interaction

作　　者：毕伯威 华启侠 沈学宁[1] 潘泳康[1] 唐颂超[1] 姚远[1] BI Bowei;HUA Qixia;SHEN Xuening;PAN Yongkang;TANG Songchao;YAO Yuan(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2020年第4期488-494,共7页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(51573088);上海市重大项目(18JC1410802)。

摘　　要：基于贻贝黏附蛋白黏接的机理,通过无规共聚物聚[3-(甲基丙烯酰氨基)丙基]三甲基氯化铵聚丙烯酰胺基多巴胺(PMPTCDMA)与聚阴离子聚对苯乙烯磺酸钠(PNaSS)的电荷相互作用,制备了聚电解质凝胶PNaSS/PMPTCDMA。PNaSS/PMPTCDMA凝胶的力学性能可以通过调节邻苯二酚基团含量和水含量进行改变,在盐溶液中浸泡后,凝胶的断裂拉伸强度可达到1.89 MPa。此外,凝胶表现出优秀的黏附性能,浸泡前其对玻璃片的剪切强度为1.58 MPa,盐溶液浸泡后其剪切强度提高至6.17 MPa,比浸泡前提高了近3倍。这种仿贻贝高性能黏合凝胶有望用于水下或潮湿环境下的黏接领域。Inspired by the adhesion between mussels and rocks,a series of hydrogels composed of poly[3-(methacrylamido)propyl]trimethylammonium chloride polyacrylamide dopamine(PMPTCDMA)and poly vinyl benzenesulfonic acid sodium salt hydrate(PNaSS)based on charge interaction were prepared.Without introducing covalent bond or coordination bond,opposite charge interaction was adopted in the PNaSS/PMPTCDMA hydrogels system.The cationic polyelectrolyte,PMPTCDMA,being simulated the proteins secreted by mussels,similarly contains abundant positive charges and catechol residues.The anionic polyelectrolyte,PNaSS,imitates the rocks with negative charged surfaces.The mechanical performance of the obtained PNaSS/PMPTCDMA hydrogels could be tuned with the content of catechol and water.The PNaSS/PMPTCDMA hydrogels exhibit high stretch performance and robust adhesion property.After being soaked with saline,the hydrogels reached high tensile fracture stress of 1.89 MPa.Besides,the shear strength of adhesion on glass slides increased to 6.17 MPa,which is almost three times stronger than the origin value(1.58 MPa),revealing a comparable performance to commerical adhesives.The mussel-inspired polyelectrolyte hydrogels were promising for the adhesion of devices underwater,or in humid environments.

关 键 词：仿贻贝 聚电解质 黏接 水凝胶 

分 类 号：O631[理学—高分子化学]