化学
低临界溶液温度
吸附
分子印迹聚合物
双酚A
聚苯乙烯
弗伦德利希方程
聚合物
解吸
化学工程
单体
朗缪尔
色谱法
高分子化学
选择性吸附
共聚物
有机化学
选择性
环氧树脂
催化作用
工程类
作者
Ruichen Dong,Jinhua Li,Hua Xiong,Wenhui Lü,Hailong Peng,Lingxin Chen
出处
期刊:Talanta
[Elsevier]
日期:2014-12-01
卷期号:130: 182-191
被引量:59
标识
DOI:10.1016/j.talanta.2014.06.055
摘要
Thermosensitive molecularly imprinted polymers (T-MIPs) on porous carriers were prepared via the synergy of dual functional monomers of 4-vinylpyridine (VP) and N-isopropylacrylamide (NIPAM), for selective recognition and controlled adsorption and release of bisphenol A (BPA) by the temperature regulation. The porous polymer supporter was synthesized by multistep swelling of polystyrene and then both the NIPAM with temperature responsiveness and the basic monomers of VP were grafted on them in a simple way. The resultant T-MIPs showed high binding capacity, fast kinetics, and the adsorption processes were found to follow Langmuir–Freundlich isotherm and pseudo-second-order kinetic models. The adsorption capacity increased slightly along with the rise of temperature (such as 20 °C) under lower critical solution temperature (LCST, 33 °C) and decreased fast above LCST (such as 50 °C). Subsequently, the T-MIPs were employed as novel adsorbents for selective solid-phase extraction (SPE) of BPA from seawater and yogurt samples. Satisfying recoveries in the range of 94.83–98.47% were obtained with the precision of 3.21% at ambient temperature (20 °C). Through 6 adsorption–desorption cycles, the reusable T-MIPs exhibited a good recoverability with the relative standard error within 9.8%. The smart T-MIPs provided great potentials for selective identification, adsorption/release and removal of BPA by simple stimuli responsive regulation.
科研通智能强力驱动
Strongly Powered by AbleSci AI