生物降解性形状记忆发泡聚己内酯的制备及性能

Preparation and Property of Biodegradable Shape-Memory Polycaprolactone Foam

采用强化辐射交联的聚己内酯(PCL)作为基体,制备了一种可降解性形状记忆泡沫材料。研究了PCL的强化辐射交联特性、辐射剂量对发泡的影响以及该泡沫材料的形状记忆性。结果表明,含有多个双键官能团的单体(TMPTA)对PCL的辐射交联具有明显的促进作用;且添加多官能团单体的辐射交联规律不再遵从Charlesby-Pinner关系式,而用陈-刘-唐关系式处理,得到比较好的线性关系。同时还研究了发泡对交联PCL形状记忆性能的影响,发现PCL泡沫的形状记忆性能与辐射剂量和发泡剂的用量密切相关。当辐射剂量较高或发泡剂用量较高时,得到较好的形状记忆效应。

A biodegradable shape memory foam material was prepared. The matrix of the foam was enhanced radiation cross-linked potycaprolactone（PCL）. The feature of enhanced radiation cross-linking of PCL, the impact of the radiation dose on shape memory effect and mechanical properties of the PCL foam were investigated. It is concluded that multifunctional monomer trimethylolpropane triacrylate （TMPTA） plays a significant promoting role on the radiation cross-linking of PCL. And it is proved that radiation cross-linking of PCL after introduction of TMPTA isn＇t in correspondence with the classic Charlesby-Pinner equation, but follows Chen-Liu-Tang relation. The results show that the radiation dose and foam agent impact on the shape memory effect of the cross-linked PCL. The more radiation dose or foam agent is, the better shape memory the PCL foam has.