A “Graft to” Electrospun Zwitterionic Bilayer Membrane for the Separation of Hydraulic Fracturing-Produced Water via Membrane Distillation
- Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Chemical Engineering; Chung Yuan Christian Univ., Taoyuan City (Taiwan). R&D Center for Membrane Technology
- Chung Yuan Christian Univ., Taoyuan City (Taiwan). R&D Center for Membrane Technology
- Sun Yat-Sen Univ., Guangzhou (China). School of Environmental Science and Engineering
- Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Chemical Engineering
Simultaneous fouling and pore wetting of the membrane during membrane distillation (MD) is a major concern. In this work, an electrospun bilayer membrane for enhancing fouling and wetting resistance has been developed for treating hydraulic fracture-produced water (PW) by MD. These PWs can contain over 200,000 ppm total dissolved solids, organic compounds and surfactants. The membrane consists of an omniphobic surface that faces the permeate stream and a hydrophilic surface that faces the feed stream. The omniphobic surface was decorated by growing nanoparticles, followed by silanization to lower the surface energy. An epoxied zwitterionic polymer was grafted onto the membrane surface that faces the feed stream to form a tight antifouling hydration layer. The membrane was challenged with an aqueous NaCl solution containing sodium dodecyl sulfate (SDS), an ampholyte and crude oil. In the presence of SDS and crude oil, the membrane was stable and displayed salt rejection (>99.9%). Further, the decrease was much less than the base polyvinylidene difluoride (PVDF) electrospun membrane. The membranes were also challenged with actual PW. Our results highlight the importance of tuning the properties of the membrane surface that faces the feed and permeate streams in order to maximize membrane stability, flux and salt rejection.
- Research Organization:
- American Institute of Chemical Engineers (AIChE), New York, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF)
- Grant/Contract Number:
- EE0007888; 1361809; 1822101; 1848682
- OSTI ID:
- 1848648
- Journal Information:
- Membranes, Vol. 10, Issue 12; ISSN 2077-0375
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
42 ENGINEERING
36 MATERIALS SCIENCE
biochemistry & molecular biology
chemistry
engineering
materials science
polymer science
antifouling
electrospinning
flux
fouling
hydrophilic
membrane distillation
omniphobic
produced water
water treatment