Superhydrophobized Polyacrylonitrile/Hierarchicall-FeOOH Nanofibrous Membrane for High-salinity Water Treatment in Membrane Distillation

doi:10.1007/s40242-021-1039-0

高等学校化学研究 ›› 2021, Vol. 37 ›› Issue (3): 470-479.doi: 10.1007/s40242-021-1039-0

Superhydrophobized Polyacrylonitrile/Hierarchicall-FeOOH Nanofibrous Membrane for High-salinity Water Treatment in Membrane Distillation

XIANG Huilin¹, ZHONG Lingling¹, REN Yongqing⁴, LIU Dongmei¹, ZHU Zhigao³, XU Ying², WANG Yu², WANG Wei¹

1. State Key Laboratory of Urban Water Resource and Environment(SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, P. R. China;
2. School of Materials Science and Environment, Zhengzhou University, Zhengzhou 450001, P. R. China;
3. Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China;
4. Daqing Petroleum Equipment Group, Daqing 163311, P. R. China

收稿日期:2021-01-29 修回日期:2021-04-01 出版日期:2021-06-01 发布日期:2021-05-31
通讯作者: WANG Yu, WANG Wei E-mail:wangyu@zzu.edu.cn;wangweirs@hit.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China(No.51873047), the Fund of the State Key Laboratory of Urban Water Resource and Environment in HIT of China(No.2019DX10) and the Natural Science Foundation of Heilongjiang Province, China(No.YQ2020B003).

Superhydrophobized Polyacrylonitrile/Hierarchicall-FeOOH Nanofibrous Membrane for High-salinity Water Treatment in Membrane Distillation

XIANG Huilin¹, ZHONG Lingling¹, REN Yongqing⁴, LIU Dongmei¹, ZHU Zhigao³, XU Ying², WANG Yu², WANG Wei¹

1. State Key Laboratory of Urban Water Resource and Environment(SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, P. R. China;
2. School of Materials Science and Environment, Zhengzhou University, Zhengzhou 450001, P. R. China;
3. Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China;
4. Daqing Petroleum Equipment Group, Daqing 163311, P. R. China

Received:2021-01-29 Revised:2021-04-01 Online:2021-06-01 Published:2021-05-31
Contact: WANG Yu, WANG Wei E-mail:wangyu@zzu.edu.cn;wangweirs@hit.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China(No.51873047), the Fund of the State Key Laboratory of Urban Water Resource and Environment in HIT of China(No.2019DX10) and the Natural Science Foundation of Heilongjiang Province, China(No.YQ2020B003).

摘要/Abstract

摘要： Water flux and hydrophobic durability play important roles in membrane distillation(MD) applications. Compared with the method of adsorbing nanoparticles by electrostatic adsorption, the surface roughness constructed by chemical bonding is more conducive to the performance of membrane. This paper reports a facile approach to fabricating superhydrophobic fluoroalkyl silane/polydimethylsiloxane@FeOOH@stabilized polyacrylonitrile(FAS/PDMS@FeOOH@SPAN) nanofibrous membrane (NFM) with outstanding hierarchical structures, aiming to achieve efficient and stable performance in MD. Electrospun polyacrylonitrile(PAN) membrane after peroxidation was chosen as the base membrane, followed by in-situ synthesis of iron oxyhydroxide and liquid-phase silanization. We tested the characteristics of FAS/PDMS@FeOOH@SPAN NFM in each preparation stage and its performance in direct contact membrane distillation(DCMD). The chemical bond between iron oxyhydroxide and the membrane is stronger, making the rough structure steady and dense. The FAS/PDMS@FeOOH@SPAN NFM exhibited a water contact angle of 155.4° and excellent hydrophobicity towards different pollutants. Besides, it showed satisfied properties with a water flux of 24.7 L·m^-2·h^-1, a high salts rejection of ca. 100% and an extended-term stability in DCMD using hypersaline water(10%, mass ratio). It is believed that this novel study proposes a universal and efficient method to fabricate a superhydrophobic surface and has great potential for high-salinity wastewater treatment in MD.

关键词: Superhydrophobic membrane, Polyacrylonitrile, Membrane distillation, High-salinity water, Electrospinning

Abstract: Water flux and hydrophobic durability play important roles in membrane distillation(MD) applications. Compared with the method of adsorbing nanoparticles by electrostatic adsorption, the surface roughness constructed by chemical bonding is more conducive to the performance of membrane. This paper reports a facile approach to fabricating superhydrophobic fluoroalkyl silane/polydimethylsiloxane@FeOOH@stabilized polyacrylonitrile(FAS/PDMS@FeOOH@SPAN) nanofibrous membrane (NFM) with outstanding hierarchical structures, aiming to achieve efficient and stable performance in MD. Electrospun polyacrylonitrile(PAN) membrane after peroxidation was chosen as the base membrane, followed by in-situ synthesis of iron oxyhydroxide and liquid-phase silanization. We tested the characteristics of FAS/PDMS@FeOOH@SPAN NFM in each preparation stage and its performance in direct contact membrane distillation(DCMD). The chemical bond between iron oxyhydroxide and the membrane is stronger, making the rough structure steady and dense. The FAS/PDMS@FeOOH@SPAN NFM exhibited a water contact angle of 155.4° and excellent hydrophobicity towards different pollutants. Besides, it showed satisfied properties with a water flux of 24.7 L·m^-2·h^-1, a high salts rejection of ca. 100% and an extended-term stability in DCMD using hypersaline water(10%, mass ratio). It is believed that this novel study proposes a universal and efficient method to fabricate a superhydrophobic surface and has great potential for high-salinity wastewater treatment in MD.

Key words: Superhydrophobic membrane, Polyacrylonitrile, Membrane distillation, High-salinity water, Electrospinning

XIANG Huilin, ZHONG Lingling, REN Yongqing, LIU Dongmei, ZHU Zhigao, XU Ying, WANG Yu, WANG Wei. Superhydrophobized Polyacrylonitrile/Hierarchicall-FeOOH Nanofibrous Membrane for High-salinity Water Treatment in Membrane Distillation[J]. 高等学校化学研究, 2021, 37(3): 470-479.

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Superhydrophobized Polyacrylonitrile/Hierarchicall-FeOOH Nanofibrous Membrane for High-salinity Water Treatment in Membrane Distillation

Superhydrophobized Polyacrylonitrile/Hierarchicall-FeOOH Nanofibrous Membrane for High-salinity Water Treatment in Membrane Distillation

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