Preparation and characterization of temperature-memory nanoparticles of MIP-CS-g-PMMA

• Published in: RSC advances 2016-01, Vol.6 (112), p.11722-11732
• Main Authors: Zheng, Xue-Fang, Lian, Qi, Yang, Hua, Wu, Hai-Xia, Cheng, Caihong, Yin, Gengwen, Zhang, Weiguo
• Format: Article
• Language: English
• Subjects: Chitosan; Copolymerization; Diffraction; Graft copolymers; Initiators; Polymethyl methacrylates; Reaction time; Recognition
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/c6ra22730a

A molecular imprinted graft copolymer of chitosan with methyl methacrylate (MIP-CS- g -PMMA) was prepared by free radical polymerization with aspirin as the template molecule and ammonium persulfate as the initiator. The molecular imprinted polymers (MIPs) were characterized by FTIR, X-ray diffraction, thermo-gravimetric analysis, 1 H NMR, TEM and SEM. The mechanism of graft copolymerization and factors affecting the graft reaction were studied in detail, and the optimum reaction conditions (to the highest % G and % E as the standard) were obtained at a methylmethacrylate concentration of 1.2 mol L −1 , chitosan concentration of 16.67 mol L −1 , initiator concentration of 0.0062 mol L −1 , temperature of 60 °C and reaction time of 7 h. MIP-CS- g -PMMA had not only the properties of high efficiency selective recognition adsorption to the template molecules, but also of temperature memory, which was a new type of functional polymer material. A molecular imprinted graft copolymer of chitosan with methyl methacrylate (MIP-CS- g -PMMA) was prepared by free radical polymerization with aspirin as the template molecule and ammonium persulfate as the initiator.