磺化氧化石墨烯/聚砜复合膜的制备及抗污染性能  

Preparation and antifouling property of sulfonated graphene oxide/polysulfone composite membrane

作　　者：朱振亚[1,2] 白成玲 王磊 孟晓荣[1] ZHU Zhenya;BAI Chengling;WANG Lei;Meng Xiaorong(Key Laboratory of Membrane Separation of Shaanxi Province,School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Province Key Laboratory of Sustained Utilization and Development of Water Resources,School of Water Resources and Environment,Hebei GEO University,Shijiazhuang 050031,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院陕西省膜分离重点实验室,西安710055 [2]河北地质大学水资源与环境学院河北省水资源可持续利用与开发重点实验室,石家庄050031

出　　处：《复合材料学报》2019年第11期2515-2521,共7页Acta Materiae Compositae Sinica

基　　金：陕西省重点科技创新团队计划（2017KCT-19-01）;陕西省重点产业链（群）项目（2017ZDCXL-GY-07-03）;西安市科技计划项目（201805033YD11CG17(3））;陕西省技术创新引导专项（2018HJCG-18）;陕西省的自然科学基础研究计划课题(2017JM5110)

摘　　要：采用浸没沉淀-相转化法制备了磺化氧化石墨烯/聚砜(SGO/PSf)复合膜,对SGO/PSf复合膜的亲水性、纯水通量、孔隙率、表面Zeta电位、膜断面和表面形貌进行测定。为了分析SGO/PSf复合膜的抗污染性能,采用自制牛血清白蛋白(BSA)探针,借助原子力显微镜(AFM)测定了SGO/PSf复合膜与BSA之间的黏附力。结果表明,由于SGO与聚乙烯吡咯烷酮(PVP)的协同作用,SGO含量为0.5wt%的SGO/PSf复合膜的表面自由能最大(114.47mJ/m^2),亲水性最好,对BSA的截留率为97.5%,污染恢复率达到80.06%。BSA与SGO含量为0.5wt%的SGO/PSf复合膜之间的黏附力最小(-0.61mN/m),说明SGO含量为0.5wt%的SGO/PSf复合膜的抗污染能力最强。The sulfonated graphene oxide/polysulfone(SGO/PSf)composite membranes were prepared by immersion precipitation-phase inversion method.The hydrophilicity,water flux,porosity,surface Zeta potential,membrane cross section and surface morphology of SGO/PSf composite membranes were measured in detail.In order to analysis the antifouling of membranes,the adhesion forces between SGO/PSf composite membranes and bovine serum albumin(BSA)were measured by atomic force microscopy(AFM)with self-made BSA probes.The experimental results show that the SGO/PSf composite membrane with 0.50 wt% SGO has the largest surface free energy(114.47 mJ/m^2)and the best hydrophilicity,due to the synergistic effect of SGO and polyvinylpyrrolidone(PVP).The rejection rate of SGO/PSf composite membrane to BSA is 97.5%,and the fouling recovery rate is 80.06%.The adhesion force between BSA and membrane is the least(-0.61 mN/m),which illustrates that the antifouling ability of the SGO/PSf composite membrane with 0.50 wt% SGO is the best.

关 键 词：磺化 氧化石墨烯 聚砜 抗污染 复合膜 

分 类 号：TB332[一般工业技术—材料科学与工程]