Attapulgite-based nanofiber membrane with oriented channels for high-efficiency oil-water separation

Hengyang Mao; Peng Xu; Shouyong Zhou; Zhaoru Fan; Ailian Xue; Meisheng Li; Yijiang Zhao; Aiqin Wang; Zhentao Wu; Yiqun Fan

doi:10.1016/j.memsci.2023.121811

Attapulgite-based nanofiber membrane with oriented channels for high-efficiency oil-water separation

Hengyang Mao, Peng Xu, Shouyong Zhou^*, Zhaoru Fan, Ailian Xue, Meisheng Li, Yijiang Zhao^*, Aiqin Wang, Zhentao Wu, Yiqun Fan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Nanofiber membranes are distinguished for their high porosity and interconnected pore structures. However, their separation application and performances are affected by irregular pore structures which are formed by the randomly packing of nanofibers. Herein, we report a facile approach to produce nanofiber membranes with oriented channels, narrow pore size, and low tortuosity. The membranes show a bi-layered structure where magnetic attapulgite (mATP) nanofiber layers are directly supported on macroporous Al₂O₃ substrates. The mATP layers are prepared by drop-coating suspensions on top of the substrates pre-filled with water, and the ordered pore structures are formed at the presence of a magnetic field. Compared with the unordered membranes, average pore size of the ordered membranes reduces from 0.45 to 0.28 μm, with the water permeance increase from 1007 to 1121 L m⁻² h⁻¹·bar⁻¹. Moreover, the stationary flux of ordered membranes increase by 59% with the retention to oil-in-water emulsion increase from 98.7% to 99.2%. Analysis of membrane fouling using the Hermia model shows that the ordered membrane can reduce membrane blocking and thus facilitate membrane cleaning and restore of separation performance.

Original language	English
Article number	121811
Journal	Journal of Membrane Science
Volume	683
Early online date	6 Jun 2023
DOIs	https://doi.org/10.1016/j.memsci.2023.121811
Publication status	Published - 5 Oct 2023

Bibliographical note

Funding Information:
This study was financially supported by the National Natural Science Foundation of China ( 21978109 , 22111530109 ), the National Key Project of China ( 2022YFB3805003 ), the Key Research and Development Program of Huaian ( HAG202202 ), the Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection ( HSXT30633 ), the Foundation of Key Laboratory of Clay Mineral Applied Research of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences ( CMAR-2022-6 ), and the Home for Researchers ( www.home-for-researchers.com ).

Keywords

Magnetic attapulgite
Membrane separation
Nanofiber
Oil-in-water emulsion
Ordered structure

Access to Document

10.1016/j.memsci.2023.121811

Cite this

@article{2085aeec095a4a6dae586b3c359c3bb8,

title = "Attapulgite-based nanofiber membrane with oriented channels for high-efficiency oil-water separation",

abstract = "Nanofiber membranes are distinguished for their high porosity and interconnected pore structures. However, their separation application and performances are affected by irregular pore structures which are formed by the randomly packing of nanofibers. Herein, we report a facile approach to produce nanofiber membranes with oriented channels, narrow pore size, and low tortuosity. The membranes show a bi-layered structure where magnetic attapulgite (mATP) nanofiber layers are directly supported on macroporous Al2O3 substrates. The mATP layers are prepared by drop-coating suspensions on top of the substrates pre-filled with water, and the ordered pore structures are formed at the presence of a magnetic field. Compared with the unordered membranes, average pore size of the ordered membranes reduces from 0.45 to 0.28 μm, with the water permeance increase from 1007 to 1121 L m−2 h−1·bar−1. Moreover, the stationary flux of ordered membranes increase by 59% with the retention to oil-in-water emulsion increase from 98.7% to 99.2%. Analysis of membrane fouling using the Hermia model shows that the ordered membrane can reduce membrane blocking and thus facilitate membrane cleaning and restore of separation performance.",

keywords = "Magnetic attapulgite, Membrane separation, Nanofiber, Oil-in-water emulsion, Ordered structure",

author = "Hengyang Mao and Peng Xu and Shouyong Zhou and Zhaoru Fan and Ailian Xue and Meisheng Li and Yijiang Zhao and Aiqin Wang and Zhentao Wu and Yiqun Fan",

note = "Funding Information: This study was financially supported by the National Natural Science Foundation of China ( 21978109 , 22111530109 ), the National Key Project of China ( 2022YFB3805003 ), the Key Research and Development Program of Huaian ( HAG202202 ), the Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection ( HSXT30633 ), the Foundation of Key Laboratory of Clay Mineral Applied Research of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences ( CMAR-2022-6 ), and the Home for Researchers ( www.home-for-researchers.com ). ",

year = "2023",

month = oct,

day = "5",

doi = "10.1016/j.memsci.2023.121811",

language = "English",

volume = "683",

journal = "Journal of Membrane Science",

issn = "0376-7388",

publisher = "Elsevier",

}

TY - JOUR

T1 - Attapulgite-based nanofiber membrane with oriented channels for high-efficiency oil-water separation

AU - Mao, Hengyang

AU - Xu, Peng

AU - Zhou, Shouyong

AU - Fan, Zhaoru

AU - Xue, Ailian

AU - Li, Meisheng

AU - Zhao, Yijiang

AU - Wang, Aiqin

AU - Wu, Zhentao

AU - Fan, Yiqun

N1 - Funding Information: This study was financially supported by the National Natural Science Foundation of China ( 21978109 , 22111530109 ), the National Key Project of China ( 2022YFB3805003 ), the Key Research and Development Program of Huaian ( HAG202202 ), the Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection ( HSXT30633 ), the Foundation of Key Laboratory of Clay Mineral Applied Research of Gansu Province , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences ( CMAR-2022-6 ), and the Home for Researchers ( www.home-for-researchers.com ).

PY - 2023/10/5

Y1 - 2023/10/5

N2 - Nanofiber membranes are distinguished for their high porosity and interconnected pore structures. However, their separation application and performances are affected by irregular pore structures which are formed by the randomly packing of nanofibers. Herein, we report a facile approach to produce nanofiber membranes with oriented channels, narrow pore size, and low tortuosity. The membranes show a bi-layered structure where magnetic attapulgite (mATP) nanofiber layers are directly supported on macroporous Al2O3 substrates. The mATP layers are prepared by drop-coating suspensions on top of the substrates pre-filled with water, and the ordered pore structures are formed at the presence of a magnetic field. Compared with the unordered membranes, average pore size of the ordered membranes reduces from 0.45 to 0.28 μm, with the water permeance increase from 1007 to 1121 L m−2 h−1·bar−1. Moreover, the stationary flux of ordered membranes increase by 59% with the retention to oil-in-water emulsion increase from 98.7% to 99.2%. Analysis of membrane fouling using the Hermia model shows that the ordered membrane can reduce membrane blocking and thus facilitate membrane cleaning and restore of separation performance.

AB - Nanofiber membranes are distinguished for their high porosity and interconnected pore structures. However, their separation application and performances are affected by irregular pore structures which are formed by the randomly packing of nanofibers. Herein, we report a facile approach to produce nanofiber membranes with oriented channels, narrow pore size, and low tortuosity. The membranes show a bi-layered structure where magnetic attapulgite (mATP) nanofiber layers are directly supported on macroporous Al2O3 substrates. The mATP layers are prepared by drop-coating suspensions on top of the substrates pre-filled with water, and the ordered pore structures are formed at the presence of a magnetic field. Compared with the unordered membranes, average pore size of the ordered membranes reduces from 0.45 to 0.28 μm, with the water permeance increase from 1007 to 1121 L m−2 h−1·bar−1. Moreover, the stationary flux of ordered membranes increase by 59% with the retention to oil-in-water emulsion increase from 98.7% to 99.2%. Analysis of membrane fouling using the Hermia model shows that the ordered membrane can reduce membrane blocking and thus facilitate membrane cleaning and restore of separation performance.

KW - Magnetic attapulgite

KW - Membrane separation

KW - Nanofiber

KW - Oil-in-water emulsion

KW - Ordered structure

UR - http://www.scopus.com/inward/record.url?scp=85161063906&partnerID=8YFLogxK

UR - https://www.sciencedirect.com/science/article/pii/S0376738823004672?via%3Dihub

U2 - 10.1016/j.memsci.2023.121811

DO - 10.1016/j.memsci.2023.121811

M3 - Article

AN - SCOPUS:85161063906

SN - 0376-7388

VL - 683

JO - Journal of Membrane Science

JF - Journal of Membrane Science

M1 - 121811

ER -

Attapulgite-based nanofiber membrane with oriented channels for high-efficiency oil-water separation

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this