A novel thermoresponsive P(NIPAAm-co-Calix) hydrogel:synthesis,characterization and its sorption ability for metal ions

摘要

A novel supramolecular smart poly(N-isopropylacrylamide-co-tetra(5-hexenyloxy)-p-tert-butylcalix[4]arene) (P(NIPAAm-co-Calix)) hydrogel was synthesized by free radical polymerization of N-isopropylacrylamine(NIPAAm) and modified calix[4]arene.The swelling behaviours and ionic adsorption capacity were studied.It is found that the polymeric network of the P(NIPAAm-co-Calix) hydrogel is characterized by an open structure with more pores and higher swelling ratio compared to the PNIPAAm hydrogel.The adsorption abilities of heavy toxic metal ions (Ni2+,Cu2+,Pb2+,Cd2+) for P(NlPAAm-co-Calix) hydrogels and PNIPAAm hydrogel were different and depend on the temperature.This could provide a theoretical basis for the intelligent response mechanism to stimulate research of suprarnolecular hydrogel.