Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation
The membrane separation of oil/water emulsions has drawn much attention in recent years. The goal of present work is to develop a facile, cost-effective modification method to improve the hydrophilicity and antifouling of polyvinylidene fluoride (PVDF) membrane. Inspired by the plant polyphenol with...
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AIDIC Servizi S.r.l.
2020-08-01
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Series: | Chemical Engineering Transactions |
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doaj-4c9a3b6f7cf14b5999b4470ddeb6c76e2021-02-16T11:28:05ZengAIDIC Servizi S.r.l.Chemical Engineering Transactions2283-92162020-08-018110.3303/CET2081097Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion SeparationZeyan LiuMei CuiRongxin SuRenliang HuangThe membrane separation of oil/water emulsions has drawn much attention in recent years. The goal of present work is to develop a facile, cost-effective modification method to improve the hydrophilicity and antifouling of polyvinylidene fluoride (PVDF) membrane. Inspired by the plant polyphenol with strong anchoring ability on the various substrates, we report a two-step polyphenol chemistry strategy to achieve the hydrophobic-to-hydrophilic transformation of PVDF membrane via coordination assembly of tannic acid and Fe3+ ion followed by grafting of glutathione (GSH). The successful coating of GSH onto the PVDF membrane was confirmed by X-ray photoelectron spectroscopy. The modified PVDF membrane has good wettability (the water contact angle is 24.8 o and the underwater oil contact angle of 144.4 o) and high antifouling ability (the BSA rejection ratio is 87.7 %). More importantly, the modified membrane has a high water filtration flux up to 5,822 L m-2 h-1 at 0.09 MPa, and the separation efficiency is more than 99 % for the various surfactant stabilized oil-in-water emulsions. It is also successfully used to separate the high viscous crude oil-in-seawater emulsion, achieving a separation efficiency of > 95 %. The results showed that the simple and versatile method is promising for the modification of PVDF membranes with the ability of emulsion separation.https://www.cetjournal.it/index.php/cet/article/view/11038 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zeyan Liu Mei Cui Rongxin Su Renliang Huang |
spellingShingle |
Zeyan Liu Mei Cui Rongxin Su Renliang Huang Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation Chemical Engineering Transactions |
author_facet |
Zeyan Liu Mei Cui Rongxin Su Renliang Huang |
author_sort |
Zeyan Liu |
title |
Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation |
title_short |
Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation |
title_full |
Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation |
title_fullStr |
Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation |
title_full_unstemmed |
Tannic Acid-Assisted Surface Coating of Peptides on the Poly(vinylidene fluoride) Membrane for Oil/Water Emulsion Separation |
title_sort |
tannic acid-assisted surface coating of peptides on the poly(vinylidene fluoride) membrane for oil/water emulsion separation |
publisher |
AIDIC Servizi S.r.l. |
series |
Chemical Engineering Transactions |
issn |
2283-9216 |
publishDate |
2020-08-01 |
description |
The membrane separation of oil/water emulsions has drawn much attention in recent years. The goal of present work is to develop a facile, cost-effective modification method to improve the hydrophilicity and antifouling of polyvinylidene fluoride (PVDF) membrane. Inspired by the plant polyphenol with strong anchoring ability on the various substrates, we report a two-step polyphenol chemistry strategy to achieve the hydrophobic-to-hydrophilic transformation of PVDF membrane via coordination assembly of tannic acid and Fe3+ ion followed by grafting of glutathione (GSH). The successful coating of GSH onto the PVDF membrane was confirmed by X-ray photoelectron spectroscopy. The modified PVDF membrane has good wettability (the water contact angle is 24.8 o and the underwater oil contact angle of 144.4 o) and high antifouling ability (the BSA rejection ratio is 87.7 %). More importantly, the modified membrane has a high water filtration flux up to 5,822 L m-2 h-1 at 0.09 MPa, and the separation efficiency is more than 99 % for the various surfactant stabilized oil-in-water emulsions. It is also successfully used to separate the high viscous crude oil-in-seawater emulsion, achieving a separation efficiency of > 95 %. The results showed that the simple and versatile method is promising for the modification of PVDF membranes with the ability of emulsion separation. |
url |
https://www.cetjournal.it/index.php/cet/article/view/11038 |
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