一种新型PEG衍生物水凝胶的温和制备方法与表征

摘要

PEG derived hydrogels were synthesized by a novel synthesis route under mild condition.First,we synthesized a soluble linear copolymer by amino-terminated polyethylene glycol ATPEG and pyromellitic dianhydride (PMDA),named by p (ATPEG-co-PMDA).The copolymer with imide rings on the main chain can be soluble in most of solvents.Then,the imide-rings of the copolymer were open by amino groups of butanediamine (BDA) under ambient condition to form cross-linking network.The cross-linking network can form in few minutes.The p(ATPEG-co-PMDA) and gels were characterized by 13C NMR and FT-IR.The gels swelled significantly in water,and co-continuous porous structure was observed by scanning electron microscopy.The ring-opening cross-linked reaction of p(ATPEG-co-PMDA) provided a simple,versatile approach to hydrogel network under mild condition without initiator,which have potential as biomaterials to apply in biomedical region.%通过温和实验条件制备得到了一种新型PEG衍生物水凝胶.首先,通过将氨基封端的PEG与PMDA共聚,合成含有刚性片段苯酰亚胺环聚合物PAPI.在无催化剂温和条件下,该聚合物与BDA形成交联互穿微孔结构的功能化产物PAPI-BDA.采用傅里叶变换红外光谱(FT-IR)、核磁碳谱(13C NMR)、凝胶渗透色谱(GPC)、溶胀率实验和扫描电镜(SEM)对PAPI及PAPI-BDA进行了表征.结果表明实验成功获得了上述产物,其在水溶剂中具有显著溶胀效果,呈互穿性微孔结构,有望作为新型生物医用材料得到应用.