PVDF中空纤维膜紫外接枝表面改性研究  

GRAFTING OF DEGMEMA ON POLY(VINYLIDENE FLUORIDE) HOLLOW FIBER MEMBRANE BY SURFACE-INITIATED PHOTOPOLYMERIZATION

作　　者：项海[1] 金丽霞[2] 程向东[3] 曾露[1] 胡晓芬[1] 刘文洪[1] 

机构地区：[1]浙江中医药大学生物工程学院,310053 [2]浙江中医药大学学工部,310053 [3]浙江省肿瘤医院腹部外科,浙江杭州310022

出　　处：《水处理技术》2013年第7期46-49,共4页Technology of Water Treatment

基　　金：浙江省钱江人才计划资助项目(Q1770802006);浙江省环保厅科技项目(2012B013);浙江中医药大学校级课题(2010ZY18)

摘　　要：以二苯甲酮(BP)为紫外引发剂,将2-甲基-2-丙烯酸-2-(2-甲氧基乙氧基)乙酯(DEGMEMA)接枝在聚偏氟乙烯膜表面以提高膜的亲水性和抗污染性能。在二苯甲酮存在的条件下,紫外光(UV)辐射下发生提氢反应,可以有效防止PVDF分子主链的剪切,保持改性膜的分离性能。考察了BP浓度、DEGMEMA浓度、UV辐射时间和光照距离对改性超滤膜接枝率、亲水性和抗污染性能的影响。用表面全反射红外光谱(ATR/FTIR)表征改性前后膜表面化学组成的变化。表面改性膜(mPVDF)的亲水性随着接枝率的增加而增加,而牛血清白蛋白(BSA)吸附量有所减少,抗污染性能增加。To improve the hydrophilic and antifouling property of polymer membrane,poly（vinylidene fluoride）（PVDF） hollow fiber membranes were surface-modified with 2-methyl-2-propenoicaci 2-（2-methoxyethoxy） ethylester（DEGMEMA） using benzophenone（BP） as a photo-initiator by a UV-photografting method.Irradiated by BP with UV light,hydrogenation was happened for PVDF membrane,which might avoid the chain breaking of membrane.The effect of DEGMEMA concentration,BP concentration,irradiation time and distance on grafting degree of PVDF were discussed.Attenuated total reflectance/Fourier transform infrared spectroscopy（ATR/FTIR） was used to characterize surface chemical functionality.Contact angle was applied to determine the hydrophilicity of the modified membrane,and BSA static adsorption was to evaluate the antifouling property.The result showed that as the increase of grafting degree,contact angles on the DEGMEMA-g-PVDF decreased obviously,which indicated that the hydrophilicity of the modified membranes was enhanced.The adsorption of BSA was smaller for modified membranes than the unmodified membranes,which indicated that the antifouling property was improved.Hence,DEGMEMA-g-PVDF co-polymerization exhibited enhanced hydrophilicity,surface wettability and ant-fouling properties than the unmodified one.

关 键 词：PVDF膜 紫外改性 二苯甲酮 亲水性 

分 类 号：TQ028.8[化学工程]