含冠醚基团水凝胶的辐射制备及其对锂离子的响应性能

Radiation synthesis of lithium-ion-response hydrogels based on crown ether

利用?射线辐照引发含双键的丙烯酸12冠4醚酯(V12C4)与丙烯酰胺(AM)发生共聚和交联反应,制备了新型的聚丙烯酰胺-丙烯酸12冠4醚酯(PAM-12C4)水凝胶。采用凝胶分析,显微红外,热重分析对PAM-12C4进行表征,并考察了PAM-12C4对水溶液中Li+的溶胀度响应性。研究表明,γ射线辐照可成功引发V12C4与AM发生共聚及交联反应,辐照至吸收剂量10 k Gy时得到PAM-12C4的凝胶分数为94%。该新型含冠醚基团的水凝胶具有良好的热稳定性,在水溶液中对Li+具有明显的选择性溶胀度响应。

A novel poly-（acrylamide-co-vinyl-12-crown-4-ether）（PAM-12C4） hydrogel with a specific lithiumion-response was synthesized via radiation-induced copolymerization and cross linking. The resultant PAM-12C4 was characterized by gel fraction, micro-FTIR spectroscopy, and thermo gravimetric analysis（TGA）. The swelling behavior of PAM-12C4 in a lithium salt solution was also studied. The results showed that the PAM-12C4 hydrogel was successfully synthesized with a gel fraction of 94% at a dose of 10 k Gy. The resultant PAM-12C4 hydrogel exhibits good thermal stability and gives an obvious response to the lithium-ion in an aqueous solution.