期刊
JOURNAL OF MEMBRANE SCIENCE
卷 611, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2020.118364
关键词
Nanoparticles; Graphene oxide membrane; Desalination; Membrane distillation
资金
- National Natural Science Foundation of China [51861135203, 91934303, 21922805, 21776125]
- Grant Challenge Project [632]
- Innovative Research Team Program by the Ministry of Education of China [IRT_17R54]
- Topnotch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
Novel design of hydrophobic membrane could improve the efficiency of membrane distillation (MD) technology. Owning to being easy to realize hydrophobic modification, fast radial heat transfer rate and limiting the passage of larger contaminants, hydrophobic graphene oxide (GO) membrane shows potential for MD process. In this work, we reported on a new type of nanoparticles intercalated GO membrane with hydrophobic surface for MD application fabricated by vacuum-filtration method. The introduction of nanoparticles (SiO2) by physical mixing enhanced the surface roughness of GO membrane. A subsequent grafting of long alkyl chains (hexadecyltrimethoxysilane) further increased the membrane hydrophobicity. The effects of treating temperature and nanoparticles content on the membrane nanostructures, surface hydrophobicity and desalination performance were systematically investigated. The optimized membrane annealed at 80 degrees C with hydrophobic surface (water contact angle: 120.8 degrees) exhibited water flux of 13.59 kg m(-2) h(-1) and salt rejection of 99.99% under 60 degrees C for 35 g L-1 NaCl in water during vacuum MD process. Besides of the expected gradually higher water flux at elevated temperature, such excellent desalination performance remains stable by varying the salt concentration or adding model foulants such as surfactant sodium dodecyl sulfate and organic humid acid in the feed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据