Plant-inspired biomimetic hybrid PVDF membrane co-deposited by tea polyphenols and 3-amino-propyl-triethoxysilane for high-efficiency oil-in-water emulsion separation

doi:10.1016/j.cjche.2022.01.034

中国化学工程学报 ›› 2023, Vol. 53 ›› Issue (1): 170-180.DOI: 10.1016/j.cjche.2022.01.034

• Full Length Article • 上一篇下一篇

Plant-inspired biomimetic hybrid PVDF membrane co-deposited by tea polyphenols and 3-amino-propyl-triethoxysilane for high-efficiency oil-in-water emulsion separation

Lijian Shi, Yaping Zhang, Yujia Tong, Wenlong Ding, Weixing Li

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China

收稿日期:2021-10-13 修回日期:2022-01-04 出版日期:2023-01-28 发布日期:2023-04-08
通讯作者: Weixing Li,E-mail:wxli@njtech.edu.cn
基金资助:
This work was supported by Tianjin Synthetic Biotechnology Innovation Capacity Improvement Project (TSBICIP-KJGG-003), Qinglan Plan of Jiangsu Education Department and the National Key Research and Development Program of China (2017YFD0400402).

Plant-inspired biomimetic hybrid PVDF membrane co-deposited by tea polyphenols and 3-amino-propyl-triethoxysilane for high-efficiency oil-in-water emulsion separation

Lijian Shi, Yaping Zhang, Yujia Tong, Wenlong Ding, Weixing Li

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China

Received:2021-10-13 Revised:2022-01-04 Online:2023-01-28 Published:2023-04-08
Contact: Weixing Li,E-mail:wxli@njtech.edu.cn
Supported by:
This work was supported by Tianjin Synthetic Biotechnology Innovation Capacity Improvement Project (TSBICIP-KJGG-003), Qinglan Plan of Jiangsu Education Department and the National Key Research and Development Program of China (2017YFD0400402).

摘要/Abstract

摘要： Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation technology. Recently, plant-/mussel-inspired interface chemistry has received more and more attention. Herein, a high antifouling poly (vinylidene fluoride) (PVDF) membrane, coated with tea polyphenols (TP, extracted from green tea) and 3-amino-propyl-triethoxysilane (APTES), was developed to purify oil-in-water emulsions. ATR-FTIR, XPS and SEM were used to demonstrate the evolution of surface biomimetic hybrid coatings. The performances of the developed membranes were investigated by pure water permeability and oil rejection for various surfactant-stabilized oil-in-water emulsions. The experimental results revealed that the membrane deposited with a mass ratio of 0.1/0.2 exhibited ultrahigh pure water permeability (14570 L·m^-2·h^-1·bar^-1, 1 bar=0.1 MPa) and isooctane-in-water emulsion permeability (5391 L·m^-2·h^-1·bar^-1) with high separation efficiency (>98.9%). Even treated in harsh environment (acidic, alkaline and saline) for seven days, the membrane still maintained considerable underwater oleophobic property (148°–153°). The fabricated plant-inspired biomimetic hybrid membranes with excellent performances light a broad application prospect in the field of oily wastewater treatment.

关键词: Plant-inspired chemistry, Hierarchical nanoparticles, Tea polyphenols, Anti-oil adhesion, Acid-base-salt resistance

Abstract: Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation technology. Recently, plant-/mussel-inspired interface chemistry has received more and more attention. Herein, a high antifouling poly (vinylidene fluoride) (PVDF) membrane, coated with tea polyphenols (TP, extracted from green tea) and 3-amino-propyl-triethoxysilane (APTES), was developed to purify oil-in-water emulsions. ATR-FTIR, XPS and SEM were used to demonstrate the evolution of surface biomimetic hybrid coatings. The performances of the developed membranes were investigated by pure water permeability and oil rejection for various surfactant-stabilized oil-in-water emulsions. The experimental results revealed that the membrane deposited with a mass ratio of 0.1/0.2 exhibited ultrahigh pure water permeability (14570 L·m^-2·h^-1·bar^-1, 1 bar=0.1 MPa) and isooctane-in-water emulsion permeability (5391 L·m^-2·h^-1·bar^-1) with high separation efficiency (>98.9%). Even treated in harsh environment (acidic, alkaline and saline) for seven days, the membrane still maintained considerable underwater oleophobic property (148°–153°). The fabricated plant-inspired biomimetic hybrid membranes with excellent performances light a broad application prospect in the field of oily wastewater treatment.

Key words: Plant-inspired chemistry, Hierarchical nanoparticles, Tea polyphenols, Anti-oil adhesion, Acid-base-salt resistance

Lijian Shi, Yaping Zhang, Yujia Tong, Wenlong Ding, Weixing Li. Plant-inspired biomimetic hybrid PVDF membrane co-deposited by tea polyphenols and 3-amino-propyl-triethoxysilane for high-efficiency oil-in-water emulsion separation[J]. 中国化学工程学报, 2023, 53(1): 170-180.

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Plant-inspired biomimetic hybrid PVDF membrane co-deposited by tea polyphenols and 3-amino-propyl-triethoxysilane for high-efficiency oil-in-water emulsion separation

Plant-inspired biomimetic hybrid PVDF membrane co-deposited by tea polyphenols and 3-amino-propyl-triethoxysilane for high-efficiency oil-in-water emulsion separation

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