含硅水凝胶膜中Na^+的渗透性  

Diffusion of Na^+ in silicon-containing hydrogel membrane

作　　者：黎新明[1] 崔英德[1] 尹国强[1] 贾振宇[1] 廖列文[1] 

机构地区：[1]仲恺农业技术学院化学与化工系,广东广州510225

出　　处：《化工进展》2007年第4期572-576,共5页Chemical Industry and Engineering Progress

基　　金：广东省自然科学基金资助项目(No.5300978)

摘　　要：采用腔膜法测定Na+在γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)与甲基丙烯酸羟乙酯(HEMA)及N-乙烯基吡咯烷酮(NVP)共聚物水凝胶角膜接触镜材料中的渗透系数,研究了Na+渗透系数的影响因素。结果表明,Na+在水凝胶膜中的扩散过程为稳态扩散,其渗透系数随温度升高而显著增大,但温度超过60℃,Na+渗透系数的增大幅度显著下降;水凝胶膜中Na+的渗透系数随NVP及KH570质量分数增多而增大,但KH570的质量分数超过15%,Na+的渗透系数反而随KH570含量增多而减小,其原因在于Na+被聚合物中的微孔陷阱捕获而无法跳出。The penetration coefficient of Na^＋ in copolymer hydrogel membrane of γ- （methacryloyl - oxy） propyltrimethoxysilane （KH 570）, hydroxyethylmethacrylate （HEMA） and N-vinylpyrrolidone （NVP） was measured, and the factors influencing the penetration coefficient of Na^＋ were investigated as well. The results showed that the diffusion process of Na^＋ in the hydrogel was stable diffusion, and the penetration coefficient increased remarkably when the temperature increased, while the increase in penetration coefficient dropped when the temperature was over 60℃. The penetration coefficient increased as the content of KH 570 or NVP increased, while the penetration coefficient decreased as the content of KH 570 was over 15wt%. The reason was Na^＋ being captured by the microholes of the hydrogel.

关 键 词：含硅水凝胶 Na^+渗透性 腔膜法 接触镜 

分 类 号：TQ317[化学工程—高聚物工业]