P(NIPAM-NVP)温敏凝胶膜的制备及其性质研究

Preparation and property of P(NIPAM-NVP) thermo-responsive hydrogel film

制备了N-乙烯基吡咯烷酮(NIPAM)改性的聚异丙基丙烯酰胺凝胶膜,分别研究了NIPAM和交联率对凝胶的平衡含水率和扩散行为的影响。结果表明:NIPAM的加入以及凝胶交联率的降低,皆可导致凝胶平衡含水率的提高。水分子在凝胶中的扩散行为属非Fick扩散,并且随着NIPAM的加入以及凝胶交联率的降低,扩散特征指数和扩散系数增加。

Thermo-responsive hydrogel film composed of N-isopropyl acrylamide（NIPAM）and N-vinyl-2-pyrrolidone（NVP）were prepared.The influence of NVP and cross-linking density on the equilibrium water content and the diffusion behavior of film were discussed.Results showed that adding NVP and reducing the cross-linking density can improve the equilibrium water content.Furthermore,the diffusion of water molecules in the hydrogel films was non-Fick diffusion.The diffusion exponent and diffusion coefficient were both increased with the increase of NVP and decrease of cross-linking density.