HEMA和NVP对硅橡胶亲水性能的影响  

Effect of HEMA and NVP on Hydrophilicity of Silicone Rubber

作　　者：姚海楠 丁雪佳[1] YAO Hainan;DING Xuejia(Beijing University of Chemical Teehnology,Beijing 100029,China)

机构地区：[1]北京化工大学生物医用材料北京实验室,北京100029

出　　处：《橡胶工业》2018年第11期1218-1223,共6页China Rubber Industry

基　　金：国家重点研发计划项目(2017YFC1104304)

摘　　要：以甲基乙烯基热固化加成型硅橡胶和甲基丙烯酸羟乙酯(HEMA)或N-乙烯基吡咯烷酮(NVP)为原料,以二苯甲酮(BP)和安息香二甲醚(DMPA)为光引发剂,通过紫外光聚合在固体硅橡胶(SiR)中引入亲水的聚甲基丙烯酸羟乙酯(PHEMA)或聚乙烯基吡咯烷酮(PVP),可以获得半互穿聚合物网络(S-IPN)材料。试验结果表明:SiR/HEMA和SiR/NVP复合材料的红外光谱出现PHEMA和PVP的O—H键及C=O键的伸缩振动特征峰;扫描电镜显示复合材料断面均有明显的凸起;热重分析中SiR的质量损失率为69. 11%,SiR/HEMA和SiR/NVP复合材料的质量损失率分别为80. 72%和79. 27%,且在高温下两种复合材料的分解速度均大于SiR;SiR表面的初始静态水接触角为107. 5°,SiR/HEMA和SiR/NVP复合材料表面的初始静态水接触角分别为52. 2°和20. 8°。这都证明SiR/HEMA和SiR/NVP复合材料中形成了S-IPN,复合材料亲水性能大幅提高,且SiR/NVP复合材料的亲水性能明显优于SiR/HEMA复合材料。Using thermosetting addition type methyl-vinyl silicone rubber,hydroxyethyl methacrylate（HEMA） or N-vinyl pyrrolidone（NVP） as raw material,and benzophenones（BP） and benzoin dimethyl ether（DMPA） as photoinitiators,hydrophilic poly（hydroxyethyl methacrylate）（PHEMA） or poly（vinylpyrrolidone）（PVP） were introduced into solid silicone rubber（SiR） by UV polymerization,and semi-interpenetrating polymer network（S-IPN） could be obtained. The test results showed that,the stretching vibration characteristic peaks of O—H bond and C=O bond in PHEMA and PVP appeared in the infrared spectrum of SiR/HEMA and SiR/NVP composites. Obvious uneven cross-section could be seen in the electron microscope photos of the composites. The mass loss rate of SiR was 69. 11%,and that of SiR/HEMA and SiR/NVP composites were 80. 72% and 79. 27%,respectively. The decomposition rates of two kinds of composites at high temperature were higher than that of SiR. The initial static water contact angle of SiR was 107. 5°,and that of SiR/HEMA and SiR/NVP composites were 52. 2° and 20. 8°,respectively. In conclusion,it was confirmed that S-IPNs were formed in SiR/HEMA and SiR/NVP composites,the hydrophilicity of two kinds of composites were improved greatly,and hydrophilicity of SiR/NVP composite was superior to that of SiR/HEMA composite.

关 键 词：甲基乙烯基热固化加成型硅橡胶 半互穿聚合物网络 甲基丙烯酸羟乙酯 N-乙烯基吡咯烷酮 紫外光辐照 亲水性能 

分 类 号：TQ333.93[化学工程—橡胶工业]