CAJ | 학술논문

采用远程动态Ar等离子体流对聚乙烯( PE)中空纤维膜组件进行整体活化-诱导接枝丙烯酸( AA),制得亲水性能持久的PE中空纤维膜组件( PE-g-AA).这种膜表面等离子体化学改性工艺具有高效、环境友好和表面无(低)损伤等特点.大量-COOH基团的引入使得PE-g-AA组件膜丝外表面的水接触角从120o降至50o左右,且PE-g-AA膜表面的化学结构和物理形貌沿膜丝轴向变得更为均匀；在为期120 d的膜性能老化实验中,经过7次纯水过滤后, PE-g-AA组件的稳态纯水通量仍为原膜的1.5倍左右,水接触角仅恢复约8o,表明PE-g-AA膜组件具有良好亲水稳定性；同时PE-g-AA组件表现出良好的抗牛血清白蛋白污染性,清洗后其纯水通量可恢复到污染前的82%.
채용원정동태Ar등리자체류대취을희( PE)중공섬유막조건진행정체활화-유도접지병희산( AA),제득친수성능지구적PE중공섬유막조건( PE-g-AA).저충막표면등리자체화학개성공예구유고효、배경우호화표면무(저)손상등특점.대량-COOH기단적인입사득PE-g-AA조건막사외표면적수접촉각종120o강지50o좌우,차PE-g-AA막표면적화학결구화물리형모연막사축향변득경위균균；재위기120 d적막성능노화실험중,경과7차순수과려후, PE-g-AA조건적은태순수통량잉위원막적1.5배좌우,수접촉각부회복약8o,표명PE-g-AA막조건구유량호친수은정성；동시PE-g-AA조건표현출량호적항우혈청백단백오염성,청세후기순수통량가회복도오염전적82%.
Long-distance and dynamic Ar low-temperature plasma flow pretreatment of polyethylene ( PE ) membrane in a module scale and subsequent acrylic acid( AA) grafting in aqueous solutions were developed to prepare hydrophilic PE hollow fiber membrane modules( PE-g-AA) successfully. This novel plasma chemical modification exhibited high efficiency, environment-friendly process and low surface etching. In the PE-g-AA membrane module, almost all contact angles along with fiber axial distance from the plasma inlet for outside membrane surfaces were close to 50o, far smaller than that of virgin membranes( about 120o) . The improve-ment in surface hydrophilicity of PE-g-AA membrane was mainly due to the chemically grafted implantation of a large amount of-COOH polar groups onto outside membrane surfaces. Meanwhile, the uniform of chemistry and morphology for outside PE-g-AA membrane surfaces was improved greatly. Moreover, after 7 times water filtrations during 120 d storage, the steady water flux of PE-g-AA module was still about 1.5 times of that of virgin one, and its average contact angle recovered by only about 8o. The PE-g-AA module exhibited good hy-drophilic stability. Also, the grafting reduced bovine serum albumin( BSA) fouling and increased pure water flux. After cleaning, the pure water flux of fouled PE-g-AA module during filtration of BSA aqueous solution can recover to about 81.79% of that of before fouling.