摘要
氧化石墨烯(GO)因其具有丰富的羟基和羧基而被作为亲水改性剂应用于膜的制备.本研究通过向由聚偏氟乙烯(PVDF)与一种三嵌段共聚物(AP)组成的混合物中加入不同比例的GO,以制备具有高效油水分离性能的PVDF/AP/GO杂化膜,并考察了其对油水乳液的分离性能.研究发现,GO添加量为0.20%(质量分数)时的膜(M3)性能表现最佳,其在分离油水乳液时截留率较高(>98.9%),相对通量恢复率高于90.7%.此外,M3的纯水通量高达1090 L/(m^(2)·h).即使经过5次油水乳液循环过滤实验,截留率(>96%)和纯水恢复通量J_(c)(>879 L/(m^(2)·h))仍然保持在非常高的水平,表现出优异的油水乳液分离性能.
Graphene oxide(GO)is applied as a hydrophilic modifier in the preparation of membranes because of its abundance of hydroxyl and carboxyl groups.In this study,PVDF/AP/GO hybrid membranes with efficient oil/water separation performance were prepared by adding different proportions of GO to a mixture consisting of polyvinylidene fluoride(PVDF)and a triblock copolymer(AP).The membrane performance was found to be the best when the GO was added to 0.20%(M3),and it had excellent oil rejection rate(R>98.9%)and relative flux recovery rate(>90.7%)in oil/water emulsion separation experiments.In addition,the permeability of M3 is greatly improved,with pure water fluxes as high as 1090 L/(m^(2)·h)and permeability fluxes of 159.1 L/(m^(2)·h).Even after five cycle filtration experiments of oil/water emulsion,R(>96%)and permeation flux[>879 L/(m^(2)·h)]remained at very high levels.Therefore,the hybrid membrane has considerable application prospects in the actual oil/water separation process.
作者
李红林
郝毅
沈舒苏
周晓吉
白仁碧
LI Honglin;HAO Yi;SHEN Shusu;ZHOU Xiaoji;BAI Renbi(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Engineering Research Center of Separation and Purification Materials and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center for Technology and Material of Water Treatment,Suzhou 215009,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2022年第4期73-80,共8页
Membrane Science and Technology
基金
国家自然科学基金项目(51478282)
江苏省研究生实践创新计划项目(SJCX21_1402)。
关键词
氧化石墨烯
聚偏氟乙烯
杂化膜
膜改性
抗污染
graphene oxide
polyvinylidene fluoride
hybrid membrane
membrane modification
antifouling
