Adsorption of tetrodotoxin by flexible shape-memory polymers synthesized from silica-stabilized Pickering high internal phase emulsion

作     者：Hong-xiang OU Chen-xia GONG Hong-lai XUE Dong-sheng ZHOU Kai-jia LI Shu-cheng LIU Hong-xiang OU;Chen-xia GONG;Hong-lai XUE;Dong-sheng ZHOU;Kai-jia LI;Shu-cheng LIU

作者机构：School of Environmental and Safety EngineeringChangzhou UniversityChangzhou 213164China Institute of Public Safety and Emergency ManagementChangzhou UniversityChangzhou 213164China School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2021年第22卷第10期

页      面：805-818页

核心收录：

学科分类：1006[医学-中西医结合] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 10[医学] 100602[医学-中西医结合临床] 

基　　金：Project supported by the National Natural Science Foundation of China(No.21878026) the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX19_1798) the Jiangsu Province University Blue Project the Project of Higher Education Reform in Jiangsu Province(No.2019JSJG022),China。 

主　　题：Tetrodotoxin(TTX) SiO_(2) Imidazolium-modified bromobutyl rubber(IBR) Pickering high internal phase emulsion(HIPE) Adsorption 

摘      要：Flexible shape-memory polymers were synthesized by Pickering high internal phase emulsion(HIPE)polymerization and used to adsorb and separate tetrodotoxin(TTX)from an aqueous solution.SiO_(2)nanoparticles were used to stabilize the Pickering oil-in-water(O/W)HIPEs.We introduced imidazolium-modified bromobutyl rubber(IBR)with excellent mechanical properties and high viscosity into the emulsion system as the shape-memory monomer.The properties,such as shape memory and morphology,were characterized by various methods,and batches of static adsorption experiments were conducted to analyze the adsorption performance of SiO_(2)@IBR on TTX.The characterization revealed that the SiO_(2)@IBR had a porous structure and good shape memory.Thus,the combination of SiO_(2)particles and IBR prevented shedding of SiO_(2)and enhanced the mechanical and adsorption properties of SiO_(2)@IBR.The results of the adsorption experiments indicated that the SiO_(2)@IBR had good adsorption of TTX.Both the Langmuir and Freundlich models fitted the isothermal adsorption experiment process.The TTX adsorption capacity of SiO_(2)@IBR was about 290.44 mg/g at 308 K.The fitting results of the pseudo-first-order and pseudosecond-order kinetic models showed that the adsorption process involved both chemical bonding and physical adsorption.After 10 adsorption and desorption experiments,the adsorption capacity of SiO_(2)@IBR decreased less than 0.03%,indicating that it had good adsorption and regeneration performance.