多重环境刺激响应性聚苄醚型树枝状分子凝胶制备及性能研究  

Azobenzene-cored Poly(benzyl ether)Dendritic Organogel:Multistimuli Responsive and Adsorptive Properties

作　　者：刘志雄 郝晓宇 房微魏 冯宇[3] Liu Zhixiong;Hao Xiaoyu;Fang Weiwei;Feng Yu(School of Chemistry and Chemical Engineering,Shanxi Datong University,Datong,037009;International Innovation Center for Forest Chemicals and Materials,College of Chemical Engineering,Nanjing Forestry University,Nanjing,210037;CAS Key Laboratory of Molecular Recognition and Function,Institute of Chemistry,Chinese Academy of Sciences,Beijing,100190)

机构地区：[1]山西大同大学化学与化工学院,大同037009 [2]南京林业大学化学工程学院,南京210037 [3]中国科学院化学研究所分子识别与功能重点实验室,北京100190

出　　处：《化学通报》2022年第1期78-85,共8页Chemistry

基　　金：山西省高等学校科技创新项目(2019L0739);山西大同大学博士后启动基金(2019-B-01);中国科学院海洋新材料与应用技术重点实验室开放基金(2021K02)和中国科学院青年创新促进会优秀会员(Y201708)资助。

摘　　要：环境刺激响应性超分子凝胶材料在传感器、光开关、人工触角、药物缓释等领域表现出潜在的应用前景。本文设计合成了一种新型的核心含偶氮苯官能团聚苄醚型树枝状分子凝胶因子CA-G2。成胶性能测试表明,该凝胶因子在23种有机溶剂和混合溶剂中均可以形成稳定的淡黄色凝胶,其中在苯中表现出最优的成凝胶性能,临界成胶浓度(CGC)可达2.0mg/mL(0.23(wt)%),相当于一个树枝状分子可以固定1.5×10^(4)个溶剂分子,表明该凝胶因子具有非常优异的成凝胶性能。并且,该类凝胶材料能够同时对热、超声和触变等外界环境刺激产生响应,并伴随着宏观上凝胶-溶胶的相互转变。此外,该类凝胶对罗丹明B染料分子具有优异的吸附性能,吸附效率高达96.7%。Stimuli responsive supramolecular gel materials have potential applications in sensors,optical switches,artificial antennae,drug delivery and so on.In this paper,a new poly(benzyl ether)dendritic organogelator containing azobenzene moieties in the dendritic core was designed,synthesized and fully characterized.The gelation behaviour of the dendritic organogelator(CA-G2)was tested in 23 organic solvents and mixed solvents.The dendrimer CA-G2 was found to be a highly efficient and versatile organogelator toward various apolar and polar organic solvents with the critical gelation concentrations(CGCs)approaching 0.23(wt)%,indicating one dendritic organogelator could immobilizing 1.5×10^(4) solvent molecules in the organogel network.Notably,these dendritic organogels were found to display multiple stimuli-responsive properties toward external stimuli including heat,ultrasound and shear stress,with a reversible sol-gel phase transition.In addition,the dendritic organogel could effectively adsorb Rhodamine B and the adsorption rate was as high as 96.7%.

关 键 词：树枝状分子 有机凝胶 刺激响应 吸附 

分 类 号：TQ427.26[化学工程]