Indexed by:
期刊论文
First Author:
Wang, Yingqi
Correspondence Author:
Jiang, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Engn Lab Petrochem Energy Efficient Separat Techn, Sch Chem Engn, Dalian 116024, Peoples R China.
Co-author:
He, Gaohong,Shao, Yushan,Zhang, Daishuang,Ruan, Xuehua,Xiao, Wu,Li, Xiangcun,Wu, Xuemei,Jiang, Xiaobin
Date of Publication:
2019-05-01
Journal:
SEPARATION AND PURIFICATION TECHNOLOGY
Included Journals:
EI、SCIE、CPCI-S
Document Type:
J
Volume:
214
Issue:
,SI
Page Number:
11-20
ISSN No.:
1383-5866
Key Words:
Membrane distillation; Superhydrophobic membrane; Antifouling;
Nucleation; Water treatment
Abstract:
In this work, the superhydrophobic polypropylene (PP) composite membranes with modified surface were successfully fabricated by loading the SiO2 nanoparticles and attaching low surface energy 1H,1H,2H,2H-perfluorodecyltriethoxysilane. The impact of deposited nanoparticle size on the surface roughness, heterogeneous nucleation barrier and critical nucleus size versus the loaded nanoparticle size (d(nuclear)(*)/d) was simulated by the model combining the surface roughness and superhydrophobility with the critical nucleation energy. The optimized loaded nanoparticles size maintained the proper roughness and d(nuclear)(*)/d to ensure the desired performance of antifouling. The improved superhydrophobic surface enhanced the anti-wetting ability of the membrane for vacuum membrane distillation (VMD) purpose. The resulting modified membrane possessed good anti wetting ability and stable anti-fouling performance during long-term continuous and batch operation of VMD treating high salinity water system. The fouling rate of the fabricated membrane was decreased to 20% of the one of the original membrane under 15 wt% high salinity feed condition.
Translation or Not:
no
