CAI Hong, ZHANG Zhengpu, SUN Pingchuan, ZHANG Yangeng, HE Binglin. PREPARATION OF HYDROGLES BASED ON POLY-N-ISOPROPYLACRYLAMIDE GRAFTED CHITOSAN VIA γ-RADIATION AND THEIR PROPERTIES[J]. Acta Polymerica Sinica, 2005,(5):709-713.
CAI Hong, ZHANG Zhengpu, SUN Pingchuan, ZHANG Yangeng, HE Binglin. PREPARATION OF HYDROGLES BASED ON POLY-N-ISOPROPYLACRYLAMIDE GRAFTED CHITOSAN VIA γ-RADIATION AND THEIR PROPERTIES[J]. Acta Polymerica Sinica, 2005,(5):709-713.DOI:
Thermo- and pH-sensitive hydrogels were prepared by graft eopolymefization of N-isopropylaerylamide onto chitosan via γ-radiation.The effects of monomer concentration and total irradiation dose on grafting percentage and grafting efficiency were studied The graft copolymers were characterized by”C CP/MAS NMR and the thermo-gravimetric analysis.The pH-and thermo-sensitivity and swelling properties of the hydrogels were investigated.The results showed that the grafting percentage and grafting efficiency increased with the increase of monomer concentration and total irradiation dose.The highest grafting percentage is 620%
the lower critical solution temperature of this hydrogel is about 28℃.