基于可逆共价酰腙键制备海藻酸水凝胶及其pH响应性研究  

Preparation of alginate hydrogel based on reversible covalent acylhydrazone bond and its pH-responsiveness

作　　者：侯一凡 王闽颖 付丽华[1] 杨华[1] Hou Yifan;Wang Minying;Fu Lihua;Yang Hua(College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004)

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《化工新型材料》2019年第5期180-184,共5页New Chemical Materials

基　　金：国家自然科学基金(21764003)

摘　　要：利用醛基化海藻酸钠与酰肼基聚乙二醇反应,获得动态共价键交联的海藻酸水凝胶。通过核磁共振光谱、红外光谱、扫描电镜对水凝胶的结构进行了表征,采用流变仪测定水凝胶的流变性能。结果表明该水凝胶具有较高的弹性和强度,并且随pH值的变化,可以实现溶胶-凝胶转化,即在中性条件下形成凝胶,在酸性条件下则变为溶胶。基于这种优异的性能,再加上优良的生物相容性,将为此类材料在药学生物领域的应用打下坚实的基础。Aldehyde-based alginate was reacted with hydrazide-based PEG to obtain a dynamical covalent crosslinked alginate hydrogel.The structure of hydrogel was characterized by 1 H-NMR,FT-IR and SEM.The rheological properties were measured by rheometer.The results showed that the hydrogel had high elasticity and strength,and with the change of pH value,sol-gel conversion can be realized which was the gel forms under neutral conditions and the sol under acidic conditions.Based on this excellent performance,combined with excellent biocompatibility the hydrogel will lay a solid foundation for the application of such materials in the field of pharmaceutical biology.

关 键 词：海藻酸钠 水凝胶 PH响应性 酰腙键 

分 类 号：TQ427.26[化学工程]