摘要
正硅酸乙酯(TEOS)经碱性催化水解缩合、去模板等工艺合成介孔二氧化硅(SiO_(2)),羧甲基壳聚糖(CTS)作为合成复合吸水树脂的基材,与丙烯酰胺(AM)和丙烯酸(AA)的共聚物接枝共聚,制备了SiO_(2)@CTS-g-(AA-co-AM)复合吸水树脂。傅立叶红外光谱仪、透射电子显微镜和热重分析仪对复合树脂进行了表征,并在不同环境下探讨了吸水树脂的吸液性能及对重金属离子的吸附性能。结果表明,亲水性的SiO_(2)加入,能有效改善吸水树脂耐温保水性能,树脂在80℃条件下干燥6h,其保水率最高可达91.8%。SiO_(2)使得复合树脂形成稳定的三维网络结构,具有较强的耐盐性能,表现出更佳的吸附性能。
Mesoporous silica(SiO_(2))was synthesized by alkaline catalytic hydrolysis condensation and template removal of ethyl or-thosilicate(TEOS),and carboxymethyl chitosan(CTS)was used as the substrate for synthesizing composite absorbent resin.SiO_(2)@CTS-g-(AA-co-AM)composite absorbent resin was prepared by grafting copolymerization with acrylamide(AM)and acrylic acid(AA).Fourier transform infrared spectroscopy,transmission electron microscopy,and thermogravimetric analysis were used to char-acterize the composite resin,and the liquid absorption performance and adsorption performance for heavy metal ions were explored in different environments.The results showed that the composite resin involved by SiO_(2)had good water retention performance.The water retention rate reached a maximum of 91.8%as the resin was dried at 80℃for 6hours,resultingfrom SiO_(2) enabledthecom-posite resin to form a stable three-dimensional network structure,strong salt resistance and better adsorption performance.
作者
张克举
夏卿
谢雷
吴凡
申盛伟
邓芳
徐玉萍
刘勇
ZHANG Ke-ju;XIA Qing;XIE Lei;WU Fan;SHEN Sheng-wei;DENG Fang;XU Yu-ping;LIU Yong(School of Environmental&Biological Engineering,Wuhan Technology and Business University,Wuhan 430065,China)
出处
《化学研究与应用》
CAS
北大核心
2024年第5期1084-1091,共8页
Chemical Research and Application
基金
武汉工商学院博士基金科研项目(D2022009)资助
湖北省优势特色学科(群)项目资助
湖北省高校优秀中青年科技创新团队项目(T201734)资助。
关键词
高倍率吸水树脂
杂化
吸液性能
重金属离子
super absorbent resin
hybridization
liquid absorption performance
heavy metal ions
