EFFECT OF PHBV CONTENT ON THE TRANSPARENCY AND SWELLING BEHAVIOR OF POLYMER/HECTORITE NANOCOMPOSITE HYDROGEL
As a kind of novel biopolymer material with good biodegradability and biocompatibility, poly(β-hydroxybutyrate-co-valerate)(PHBV) was introduced into organic/inorganic network structure of nanocomposite hydrogels prepared by in-situ free-radical polymerization based on monomer N-isopropylacrylamide(NIPAM) and physical cross-linker hectorite. As viewed from appearance of the hydrogels, obvious change occurred from transparent to white with the increase of PHBV content, which reflects the structural shift from homogeneity to inhomogeneity. The swelling ratio and swelling kinetics of thermo-sensitive poly(NIPAM/PHBV/Hectorite) hydrogels with different PHBV content was investigated by gravimetric method. It was found that the incorporation of PHBV decreases the swelling ratio of pure poly(NIPAM/Hectorite) hydrogels on account of hydrophobicity of PHBV. Furthermore, in the case of swelling kinetics, the result of linear regression shows that relaxation of polymer chains of the hydrogels controls the swelling process.
Hydrogel polyβ-hydrozybutyrate-co-valerate) hectorite
QINGSONG ZHANG YIPING ZHAO LI CHEN
Tianjin Key Laboratory of Fiber Modification and Functional Fiber, School of Materials Science and Chemical Engineering, Tianjin Polytechnic University, No.63 Chenglin Road, Tianjin, 300160, Peoples Republic of China
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1365-1370
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）