PEO/PDMAEMA组成的半互穿网凝胶的辐射合成与电场响应性研究

利用γ辐射引发溶液聚合合成了 3种不同聚环氧乙烷 (PEO)含量的聚环氧乙烷 聚甲基丙烯酸N 二甲氨基乙酯 (PEO PDMAEMA)的半互穿网凝胶 (Semi IPNs) ,通过实验找到了合成这种半互穿网凝胶的最佳条件 .实验中发现PEO含量对凝胶的平衡溶胀度 (EDS)有明显的影响 ,当加入少量的PEO(～ 3wt% )时EDS明显增大 ,后随着PEO含量的逐渐增加 ,EDS又逐渐减小并趋于稳定 .这种Semi IPNs的凝胶有明显的电场响应性 ,其中PEO含量的不同 ,电场响应的效果也有明显的差别 ,以PEO与DMAEMA初始料液比为5∶95的凝胶电场响应性最好 .利用这种凝胶对中药三七进行吸附与电场循环控释得到了很好的效果

RADIATION SYNTHESIS AND ELECTRON RESPONSIVE CHARACTERSTICS OF SEMI-IPNS COMPOSED OF POLYETHYLENE OXIDE AND POLY(2-DIMETHYLAMINOETHYL METHACRYLATE)

Three Semi-interpenetrating polymer networks (Semi-IPNs) composed of poly(2-dimethylaminoethyl methacrylate)(PDMAEMA), and poly(ethylene oxide),PEO, were synthesized by γ-radiation technology.The optimum synthesizing conditions have been found in the work.The equilibrium swelling ratio,EDS,of the Semi-IPNs was effected by the weight ratio between PEO and DMAEMA.When there was a little PEO (～3 wt%) in the Semi-IPNs,the EDS of Semi-IPNs was much larger than that of PDMAEMA,as the weight ratio of PEO in Semi-IPNs increased the EDS of Semi-IPNs decreased gradually and tended to be stable.The Semi-IPNs showed obvious electric-responsiveness,and the effect was dependent on the weight ratio of PEO in the Semi-IPNs.The electric-responsiveness was the most remarkable when the weight ratio of PEO was 5% in Semi-IPNs.The Semi-IPNs were used successfully in entraping and electric field controled release of a Chinese traditional medicine,saponins.