多壁碳纳米管表面共价偶联分子印迹聚合物及其对水中双酚A的吸附性能  

Coupling of the molecularly imprinted polymers on the surface of multi-walled carbon nanotubes and adsorption performance for bisphenol A in aqueous solution

作　　者：熊振湖[1,2] 朱乐[1,2] 

机构地区：[1]天津市水质科学与技术重点实验室,天津300384 [2]天津城市建设学院环境与市政工程系,天津300384

出　　处：《环境科学学报》2013年第5期1264-1271,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金资助项目(No.50878138)~~

摘　　要：通过羧化、酰氯化、酰胺化反应在多壁碳纳米管(MWCNTs)表面引入不饱和侧链(—CH=CH2),然后以双酚A(BPA)为模板分子,4-乙烯吡啶(4-VP)为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,在MWCNTs—CH=CH2表面制备一种新型的分子印迹聚合物纳米材料.采用扫描电镜、傅里叶变换红外光谱(FT-IR)、热重分析对制备吸附剂(MWCNTs@ BPA-MIPs)的结构与形态进行了表征且证实有一层稳定的分子印迹聚合物(MIPs)接枝在MWCNTs的表面.通过平衡结合实验与斯卡查德(Scatchard)分析证实了印迹聚合物的吸附性质.结果证实,BPA的吸附容量高达123.8mg·g-1,而且与模板分子BPA的类似物双酚C(BPC)和邻硝基酚(o-NP)比较,MWCNTs@ BPA-MIPs对BPA具有更好的选择性和更快的吸附动力学特性.A novel molecularly imprinted polymer nanocomposite material named as MWCNTs@BPA-MIPs was prepared on Multiwalled Carbon Nanotubes （MWCNTs） surface by introducing an unsaturated side chain, -CH=CH2, on the MWCNTs surface via carboxylation, acylation and amidation and then using bisphenol A （BPA） as template molecules, 4-vinyl pyridine （4-VP） as the functional monomer, and ethylene glycoldimethacrylate （EGDMA） as the cross-linker. The structure and morphology of the obtained MWCNTs@BPA-MIPs were characterized by scanning electron micrograph （SEM）, Fourier transform infrared spectroscopy （FT-IR）, and thermogravimetry analysis and a stable imprinted layer was found to be grafted on the surface of MWCNTs. The adsorption properties of MWCNTs@BPA-MIPs to BPA were demonstrated by equilibrium rebinding experiments and Scatchard analysis. The results revealed that the adsorption capacity of BPA onto the MWCNTs@BPA-MIPs is up to 123.8 mg·g^-1 The nanocomposite material prepared in our work possessed better selectivity, higher capacity and faster kinetics for template molecules of BPA than those for the analogues of BPA molecules, such as bisphenol C （BPC） and o-nitrophenol （o-NP）.

关 键 词：分子印迹聚合物 多壁碳纳米管 共价偶联 双酚A 吸附性能 

分 类 号：X131.2[环境科学与工程—环境科学]