Hierarchical Composite Membranes with Robust Omniphobic Surface Using Layer-By-Layer Assembly Technique
AuthorsWoo, Yun Chul
Tijing, Leonard Demegilio
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/626864
MetadataShow full item record
AbstractIn this study, composite membranes were fabricated via layer-by-layer (LBL) assembly of negatively-charged silica aerogel (SiA) and 1H, 1H, 2H, 2H – Perfluorodecyltriethoxysilane (FTCS) on a polyvinylidene fluoride phase inversion membrane, and interconnecting them with positively-charged poly(diallyldimethylammonium chloride) (PDDA) via electrostatic interaction. The results showed that the PDDA-SiA-FTCS coated membrane had significantly enhanced the membrane structure and properties. New trifluoromethyl and tetrafluoroethylene bonds appeared at the surface of the coated membrane, which led to lower surface free energy of the composite membrane. Additionally, the LBL membrane showed increased surface roughness. The improved structure and property gave the LBL membrane an omniphobic property, as indicated by its good wetting resistance. The membrane performed a stable air gap membrane distillation (AGMD) flux of 11.22 L/m2h with very high salt rejection using reverse osmosis brine from coal seam gas produced water as feed with the addition of up to 0.5 mM SDS solution. This performance was much better compared to those of the neat membrane. The present study suggests that the enhanced membrane properties with good omniphobicity via LBL assembly make the porous membranes suitable for long-term AGMD operation with stable permeation flux when treating challenging saline wastewater containing low surface tension organic contaminants.
CitationWoo YC, Kim Y, Yao M, Tijing LD, Choi J, et al. (2018) Hierarchical Composite Membranes with Robust Omniphobic Surface Using Layer-By-Layer Assembly Technique. Environmental Science & Technology. Available: http://dx.doi.org/10.1021/acs.est.7b05450.
SponsorsThis research was supported by a grant (17IFIP-B065893-05) from the Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government. The authors also acknowledge the grants from the ARC Future Fellowship (FT140101208) and 2017 FEIT Post Thesis Publication Scholarship by University of Technology Sydney (UTS).
PublisherAmerican Chemical Society (ACS)
- Omniphobic Polyvinylidene Fluoride (PVDF) Membrane for Desalination of Shale Gas Produced Water by Membrane Distillation.
- Authors: Boo C, Lee J, Elimelech M
- Issue date: 2016 Nov 15
- Omniphobic Hollow-Fiber Membranes for Vacuum Membrane Distillation.
- Authors: Lu KJ, Zuo J, Chang J, Kuan HN, Chung TS
- Issue date: 2018 Apr 3
- Novel Janus Membrane for Membrane Distillation with Simultaneous Fouling and Wetting Resistance.
- Authors: Huang YX, Wang Z, Jin J, Lin S
- Issue date: 2017 Nov 21
- Development of Omniphobic Desalination Membranes Using a Charged Electrospun Nanofiber Scaffold.
- Authors: Lee J, Boo C, Ryu WH, Taylor AD, Elimelech M
- Issue date: 2016 May 4
- Electrospun Nanofiber Membranes Incorporating PDMS-Aerogel Superhydrophobic Coating with Enhanced Flux and Improved Antiwettability in Membrane Distillation.
- Authors: Deka BJ, Lee EJ, Guo J, Kharraz J, An AK
- Issue date: 2019 May 7