Preparation and Property Study of Thermo-Sensitive PAC/HPMC Hydrogel

A series of thermo-sensitive hydrogels were successfully prepared by physical methods with hydroxy propyl methyl callulose(HPMC), pollyanionic callulose(PAC), AlCl<sub<３</sub<·6H<sub<2</sub<O as raw materials, and their properties such as gel strength, swelling behavior,salt resistence and temperature sensibility were studied.The results showed that the gel strength of PAC/HPMC hydrogel was influenced by HPMCs content and molecular weight. There was always an optimum content and molecular weight corresponding to the maximum in gel strength. The equilibium swelling ratio of PAC/HPMC hydrogel decreased with the concentration of Nacl solution and were always higher than that of pure PAC hydrogel; PAC/HPMC hydrogels were thermosensitive, the LCST of PAC/HPMC hydrogels were lower than those of HPMC.