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 

机构地区：[1]School of Environmental and Safety Engineering,Changzhou University,Changzhou 213164,China [2]Institute of Public Safety and Emergency Management,Changzhou University,Changzhou 213164,China [3]School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2021年第10期805-818,共14页浙江大学学报（英文版）A辑（应用物理与工程）

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。

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.

关 键 词：Tetrodotoxin(TTX) SiO_(2) Imidazolium-modified bromobutyl rubber(IBR) Pickering high internal phase emulsion(HIPE) ADSORPTION 

分 类 号：R284.2[医药卫生—中药学]