Hydroxyl functionalized polytriazole-co-polyoxadiazole as substrates for forward osmosis membranes
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Environmental Microbial Safety and Biotechnology Lab
Nanostructured Polymeric Membrane Lab
Online Publication Date2015-02-11
Print Publication Date2015-02-25
Permanent link to this recordhttp://hdl.handle.net/10754/564068
MetadataShow full item record
AbstractHydroxyl functionalized polytriazole-co-polyoxadiazole (PTA-POD) copolymers have been synthesized and cast as promising highly thermally stable, chemically resistant, and antiorganic/biological fouling porous substrates for the fabrication of thin-film composite (TFC) forward osmosis (FO) membranes. The roles of PTA/POD ratios in the membrane substrates, TFC layers, and FO membrane performance have been investigated. This study demonstrates that the substrate fabricated from the copolymer containing 40 mol % PTA is optimal for the TFC membranes. Compared to the POD-TFC membrane, the 40 mol % PTA-TFC membrane exhibits a remarkable decrease in structural parameter (S) of more than 3.3 times. In addition, the 40 mol % PTA-TFC membrane is characterized by high water fluxes of 24.9 LMH and 47.2 LMH using 1 M NaCl as the draw solution and DI water as the feed under FO and pressure retarded osmosis (PRO) modes, respectively. Compared to a polysulfone (PSU) supported TFC-FO membrane under similar fabrication conditions, the 40% mol PTA-TFC membrane shows better FO performance and enhanced antifouling properties on the support (lower protein binding propensity and improved bacterial inhibition). Moreover, the performance of the 40 mol % PTA supported TFC-FO membrane can be improved to 37.5 LMH (FO mode)/78.4 LMH (PRO mode) and potentially higher by optimizing the support morphology, the TFC formation, and the post-treatment process. Hence, the use of newly developed hydroxyl functionalized polytriazole-co-polyoxadiazole copolymers may open up a new class of material for FO processes.
SponsorsThe authors would like to thank King Abdullah University of Science and Technology (KAUST) for funding this research project. Thanks are due to Dr. Russell Tayouo and Mr. Yihui Xie for their kind help.
PublisherAmerican Chemical Society (ACS)
- Development of thin-film composite forward osmosis hollow fiber membranes using direct sulfonated polyphenylenesulfone (sPPSU) as membrane substrates.
- Authors: Zhong P, Fu X, Chung TS, Weber M, Maletzko C
- Issue date: 2013 Jul 2
- Water reclamation from emulsified oily wastewater via effective forward osmosis hollow fiber membranes under the PRO mode.
- Authors: Han G, de Wit JS, Chung TS
- Issue date: 2015 Sep 15
- Ferric and cobaltous hydroacid complexes for forward osmosis (FO) processes.
- Authors: Ge Q, Fu F, Chung TS
- Issue date: 2014 Jul 1
- Mesh-Embedded Polysulfone/Sulfonated Polysulfone Supported Thin Film Composite Membranes for Forward Osmosis.
- Authors: Zhao Y, Wang X, Ren Y, Pei D
- Issue date: 2018 Jan 24
- High performance thin-film composite forward osmosis hollow fiber membranes with macrovoid-free and highly porous structure for sustainable water production.
- Authors: Sukitpaneenit P, Chung TS
- Issue date: 2012 Jul 3