Abstract
In this study, a novel hydrophobic blend polyvinylidene fluoride (PVDF) nanofibrous membrane with polybenzoxazine (PBz) was fabricated by the electrospinning technique to apply in membrane distillation (MD) process. Accordingly, pristine PVDF and a fluoro containing benzoxazine monomer (Bz) was blended and then thermally treated for crosslinking the Bz. The membrane properties were determined in terms of contact angle, young module, thickness, and the membranes were characterized by scanning electron microscope and Fourier transform infrared spectroscopy. The water contact angle of membranes increased from ca. 102.8° for the pristine PVDF membrane to 132.7° post cured Bz blended membrane. Moreover, the mechanical properties of blended membranes enhanced, while obtaining smoother and physically more stable membranes compared to the pristine nanofibrous membrane. The optimum membranes were tested in a lab-scale vacuum assisted air gap membrane distillation system. Results showed that Bz blended and cured membranes exhibited higher rejections and permeate flux for reverse osmosis brine and boron solutions compared to the pristine membrane that demonstrate the promising potential of Bz blended membranes in MD applications.
Original language | English |
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Article number | 116203 |
Journal | Desalination |
Volume | 546 |
DOIs | |
Publication status | Published - 15 Jan 2023 |
Bibliographical note
Publisher Copyright:© 2022 Elsevier B.V.
Funding
The authors acknowledge the financial support of the Istanbul Technical University (Turkey) and Kharazmi University (Iran). This work was supported by Research Fund of the Istanbul Technical University (Grant number: 43962 ).
Funders | Funder number |
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Kharazmi University | 43962 |
Istanbul Teknik Üniversitesi |
Keywords
- Boron removal
- Desalination
- Electrospinning
- Membrane distillation
- Polybenzoxazine