摘要
通过将原位溶胶-凝胶法和自由基聚合法巧妙相结合制备了一种坚固、荧光的杂化水凝胶石墨烯量子点-TiO_(2)/聚丙烯酰胺(GQDs-TiO_(2)/PAM)。在该杂化水凝胶中,同时充当多功能交联剂和纳米填料的TiO_(2)和GQDs粒子与水凝胶网络中的亲水基团通过氢键等非共价键牢固地结合。PAM、TiO_(2)和GQDs之间的强非共价键作用赋予该凝胶优异的力学性能。GQDs-TiO_(2)/PAM(0.5wt%GQDs)水凝胶的断裂伸长率和抗拉强度分别高达2412%和181 kPa,为TiO_(2)/PAM水凝胶的1.78和1.13倍。另外,GQDs的引入还赋予该复合水凝胶特殊的荧光性能,它能够在365 nm紫外光照射下发出明显的蓝色荧光。因此,该水凝胶在生物医药、重金属离子检测、荧光探针等领域有很大发展潜力。
A kind of strong and fluorescent hybrid hydrogel graphene quantum dots(GQDs)-TiO_(2)/polyacrylamide(PAM)hydrogel was prepared via a simultaneous in-situ sol-gel method and free radical polymerization.In the hybrid hydrogel,TiO_(2)and GQDs particles,which served as multifunctional crosslinkers and nano-fillers,were firmly bound to hydrophilic groups in the hydrogel network through noncovalent bonds such as hydrogen bonds.The strong non-covalent interactions among PAM,TiO_(2)and GQDs endowed the gel with excellent mechanical properties.The elongation at break and tensile strength of GQDs-TiO_(2)/PAM(0.5wt%GQDs)hybrid hydrogels are 2412%and 181 kPa,respectively,which are 1.78 and 1.13 times that of TiO_(2)/PAM hydrogels.In addition,the introduction of GQDs also endowed the hybrid hydrogels with special fluorescence properties,which could emit obvious blue fluorescence under 365 nm ultraviolet light.Therefore,the hydrogel has great development potential in biomedicine,heavy metal ion detection,fluorescence probes,and other fields.
作者
杜娟
田洪莉
何雨璇
张超
佘小红
朱雯莉
杨巧玲
DU Juan;TIAN Hongli;HE Yuxuan;ZHANG Chao;SHE Xiaohong;ZHU Wenli;YANG Qiaoling(College of Materials Science and Engineering,Sichuan University of Science and Engineering,Zigong 643000,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2024年第4期1968-1976,共9页
Acta Materiae Compositae Sinica
基金
四川省科技计划项目(2022JDRC0090)。
