从理论和实验两方面研究了凝胶网络中溶质的扩散 .着重于凝胶网络的涨落对扩散的影响 ,以动态链渗流理论建立了凝胶动态网络中溶质扩散的数学模型 .制备了聚异丙基丙烯酰胺(PNIPA)水凝胶 ,用激光光散射法测定了凝胶网络的涨落行为 .用双室膜池法以甲基蓝为溶质测定了凝胶中的扩散 .模型与实验结果定性相符 . The diffusion of solute in the gel network was studied theoretically and experimentally, focusing on the influence of the fluctuation of the gel network on the diffusion. The mathematical model of solute diffusion in the gel dynamic network was established by the dynamic chain seepage theory. Isopropyl acrylamide (PNIPA) hydrogel was used to measure the fluctuation of the gel network by laser light scattering method.The diffusion in the gel was measured by the double chamber membrane method with methyl blue as solute.Models and Experiments The results qualitatively match.