The study of silk fabric grafted with hema 甲基丙烯酸羟乙酯接枝改性真丝织物的研究
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Oxygen transmissibility and permeability of nvp - hema hydrogel materials 角膜接触镜材料的透氧性能
3.
N - vinylpymolidone - co - 2 - hydroxyethyl methacrylate ( nw - co - hema ) copolymer had been widely studied and used as soft contact lens and controlled - releasing materials in foreign countrys . but this hydrogel material ' s oxygen penetration capability was closely correlated to its equation water content . when the hydrogel had high equation water content , its oxygen penetration capability was improved , but its mechanism performance was droped N -乙烯基吡咯烷酮( nvp )和甲基丙烯酸-羟己酯( hema )的共聚物水凝胶作为软质接触透镜材料(隐形眼镜)和药物释控材料，在国外已经得到深入研究和应用，但是这种水凝胶材料的氧气透过性能与其平衡含水量密切相关，水凝胶含水量较高，其氧气透过性能有所提高，但材料的机械性能下降。
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The results of the uni - factor experiments and perpendicular experiments show their best mechanic synthesizing craft as followed : nvp ( 10 % wt ) , kh570 ( 20 % wt ) , hema ( 70 % wt ) , initiator ( 0 . 2 % wt ) , crosslinker ( 20 % wt ) , reacting 20 hours under 80 c . the factors which influenced organic silicon modified pvp hydrogel soft contact lens material ' s swelling capabilities were researched , which included temperature , monomer content , ion concentration etc . the experiments showed the equation swelling content ewc improved with the increase of nw , droped with the increase of kh570 and ion concentration , improved then droped with the raise of temperature , and hydrogels got the least ewc at 45 c . experiment carried on todiscuss water dehydration mechanism of organic silicon modified pvp hydrogel soft contact lens materials , which showed dehydration process could be divided into evaporating stage and diffusing stage 正交实验结果表明， nvp ? hema ? kh570共聚物的机械性能最佳时，其合成工艺条件为： nvp用量10 (质量百分含量，下同) ， kh570用量20 ， hema用量70 ，引发剂aibn用量0 . 2 ，交联剂nmba用量0 . 2 ，反应温度为80 ，反应时间16h 。讨论了单体配比、溶胀温度、离子浓度等因素对有机硅改性pvp水凝胶软接触透镜材料溶胀性能的影响。实验得出：水凝胶材料的平衡溶胀度ewc随单体nvp含量的增加而增大， ewc随kh570用量的增加而减小，随离子浓度的增大而略微降低，随溶胀温度的升高先稍微下降后有所提高， 45时平衡含水量最低。
