摘要
利用浸没沉淀的工艺制备聚丙烯腈/聚醚砜(PAN/PES)复合超滤膜,并使用碱溶液浸泡的方法对PAN/PES超滤膜表面进行亲水改性。通过扫描电子显微镜研究改性前后的超滤膜表面结构,使用红外光谱仪分析超滤膜的化学组成,通过接触角测量仪对改性前后超滤膜的表面亲水性进行对比测试,采用膜性能评价仪对超滤膜的纯水通量、抗污染性进行测试。结果表明:碱水解处理最佳水解时间为1.0 h,PAN/PES-1.0 h改性超滤膜的纯水通量为541.9 L/(h·m^(2)),相较于未改性的原始超滤膜提高了75%。相较于原始超滤膜,经过1.0 h水解改性后超滤膜的水接触角从79.3°降低至62.9°,说明改性后超滤膜的表面亲水性得到提升。同时,水解膜的抗污染性也得到明显提升,膜污染系数从0.8462降低至0.2174。
Polyacrylonitrile/polyethersulfone(PAN/PES) composite ultrafiltration membrane was prepared by immersion precipitation process,and the surface of PAN/PES ultrafiltration membrane was hydrophilically modified by soaking in alkali solution.The surface structure of UF membrane before and after modification was studied by scanning electron microscope,the chemical composition of UF membrane was analyzed by infrared spectrometer,the surface hydrophilicity of UF membrane before and after modification was compared by contact angle measuring instrument,and the pure water flux and anti-pollution of UF membrane were tested by membrane performance evaluating instrument.The results show that the optimum hydrolysis time is 1.0 h,and the pure water flux of PAN/PES-1.0 h modified ultrafiltration membrane is 541.9 L/(h·m^(2)),which is increased by 75% compared with the original unmodified ultrafiltration membrane.Compared with the original ultrafiltration membrane,the water contact angle of the modified ultrafiltration membrane decreases from 79.3° to 62.9° after 1.0 h hydrolysis,indicating that the surface hydrophilicity of the modified ultrafiltration membrane is improved.At the same time,the anti-fouling ability of the hydrolysis membrane is also improved obviously,and the membrane fouling coefficient decreases from 0.846 2 to 0.217 4.
作者
刘鑫
赵旭
孔磊
吴昆鹏
谭志勇
LIU Xin;ZHAO Xu;KONG Lei;WU Kun-peng;TAN Zhi-yong(Engineering Research Center of the Ministry of Education for Synthetic Resins and Special Fibers,Changchun University of Technology,Changchun 130012,China;College of Chemical Engineering,Changchun University of Technology,Changchun 130012,China)
出处
《塑料科技》
CAS
北大核心
2023年第11期50-55,共6页
Plastics Science and Technology
关键词
超滤膜
抗污染性
碱水解
渗透率
聚丙烯腈
Ultrafiltration membrane
Pollution resistance
Alkaline hydrolysis
Permeability
Polyacrylonitrile
