原位法制备聚乙二醇/聚(丙烯酰胺-co-丙烯酸)荧光水凝胶  

In-Situ Preparation of Polyethylene Glycol/Poly(acrylamide-co-acrylic acid)Fluorescent Hydrogel

作　　者：杨羽歆 周祥富 郑丹丹 许一婷[1,2] 曾碧榕 陈国荣[1,2] 罗伟昂 袁丛辉[1,2] 戴李宗 Yuxin Yang;Xiangfu Zhou;Dandan Zheng;Yiting Xu;Birong Zeng;Guorong Chen;Wei’Ang Luo;Conghui Yuan;Lizong Dai(School of Materials,Xiamen University,Xiamen 361005,China;Fujian Provincial Key Laboratory of Fire Retardant Materials,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学材料学院,福建厦门361005 [2]福建省防火阻燃材料重点实验室,福建厦门361005

出　　处：《高分子材料科学与工程》2022年第6期153-160,169,共9页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(52033008,52173045);福建省自然科学基金资助项目(2020J06005);厦门大学校长基金(20720210039)。

摘　　要：在丙烯酰胺和丙烯酸共聚交联网络中掺入线型聚乙二醇(PEG)形成半互穿聚合物网络结构以提高水凝胶的力学性能,同时引入柠檬酸(CA)和乙二胺(EDA)原位反应形成非共轭型荧光聚合物点(NCPD),一步制备了具有高回弹性的聚乙二醇/聚(丙烯酰胺-co-丙烯酸)PEG/P(AM-co-AA)荧光水凝胶。该水凝胶具有良好的力学强度、韧性,高荧光强度和荧光均一性,且光致发光具有金属离子敏感性。拉伸测试结果表明,PEG/P(AM-co-AA)荧光水凝胶的断裂强度达到~192.2 kPa,拉伸4倍后仍可以恢复到初始状态。光致发光研究结果表明,水凝胶在365 nm的波长激发下,可以发出明亮的蓝色荧光(发射波长434~467 nm)。荧光性能具有强Fe敏感性,猝灭效率可达99%。该荧光水凝胶在柔性电子器件和生物传感等领域具有潜在应用。Linear polyethylene glycol(PEG)was added into the cross-linking polymer networks of acrylamide and acrylic acid to form semi interpenetrating polymer networks to improve the mechanical properties of the hydrogels.In the hydrogel networks,citric acid(CA)and ethylenediamine(EDA)were introduced to form non conjugated fluorescent polymer(NCFP)dots thus preparing polyethylene glycol/poly(acrylamide-co-acrylic acid)PEG/P(AM-co-AA)fluorescent hydrogels with high resilience.The hydrogels have the good mechanical strength,toughness,high fluorescence intensity and fluorescence homogeneity,and photoluminescence with metal ion sensitivity.The tensile test results show that the breaking strength of PEG/P(AM-co-AA)fluorescent hydrogel reaches~192.2 kPa,and it can return to its initial state after stretching four times.The photoluminescence results show that the blue fluorescence of the hydrogels can be excited at the wavelength of 365 nm(emission wavelength of 434~467 nm).The fluorescence performance has strong Fesensitivity,and the quenching efficiency can reach 99%.The fluorescent hydrogels have potential applications in flexible electronic devices and biosensors.

关 键 词：水凝胶 高回弹性 荧光 原位法 离子响应 

分 类 号：TQ427.26[化学工程]