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Membranes
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Surface Functionalization and Posttreatment for Advanced Membrane Fabrication
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Surface Functionalization and Posttreatment for Advanced Membrane Fabrication

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (29 May 2023) | Viewed by 5582

Special Issue Editors

Dr. Yi Wang

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Guest Editor
State Key Laboratory of NBC Protection for Civilian, 37 South Central St., Yangfang Community, Changping District, Beijing 102205, China
Interests: 2D-nanomaterial-based/modified membrane; desalination; confined mass transfer; isotope separation; posttreatment technology
Dr. Fanxin Kong

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Guest Editor
State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, China
Interests: advanced membrane for water purification; nanofiltration; novel materials-based/modified membrane; thin film nanocomposite membrane; confined mass transport in membrane separation
Dr. Deyin Hou

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Guest Editor
National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Interests: membrane distillation; janus membrane: novel materials-based/modified membrane；membrane process for water treatment

Special Issue Information

Dear Colleagues,

Surface functionalization/modification of membranes is an efficient technique that can bestow these membranes with satisfactory properties or tailor them into valuable finished products, and it has been widely applied to polymeric/inorganic membranes in many fields and progressed fast in recent years. The modified membranes have been widely used in various applications, such as in separation processes for liquid and gaseous mixtures (gas separation, reverse osmosis, forward osmosis, pervaporation, nanofiltration, ultrafiltration, microfiltration). To date, various approaches to the surface modification and functionalization of membranes, such as plasma-induced surface treatment, UV-induced surface treatment, the layer-by-layer technique, etc., have been widely used for better membrane performance and even the implementation of new functionalities.

This Special Issue, titled "Surface Functionalization and Posttreatment for Advanced Membrane Fabrication” aims to focus on new surface functionalization  or posttreatment techniques, strategies, or materials for modifications to achieve better performance in liquid and gaseous mixture separation (gas separation, reverse osmosis, pervaporation, nano-filtration, ultrafiltration, microfiltration). Moreover, we welcome papers related to 2D nanomaterial modification, such as MOFs, COFs, HOFs, and especially lamellar materials such as graphene oxide, MXene, and hydrotalcite, due to their well-designed roles in improving membrane permeability, strength, and lifespan.

We look forward to receiving your contributions. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

We look forward to receiving your contributions.

Dr. Yi Wang
Dr. Fanxin Kong
Dr. Deyin Hou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • surface modification/posttreatment
  • layer-by-layer technique
  • grafting strategy
  • deposition technique
  • plasma

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Published Papers (2 papers)

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Research

13 pages, 7914 KiB  
Article
Fabrication of Unidirectional Water Permeable PS/PET Composite Nanofibers Modified with Silver Nanoparticles via Electrospinning
by Chong Li, Haoyu Wang, Xiaolei Zhao, Kaihua Yang, Qinhua Meng and Longwang Zhang
Membranes 2023, 13(3), 257; https://doi.org/10.3390/membranes13030257 - 21 Feb 2023
Cited by 7 | Viewed by 2913
Abstract
In this study, the composite nanofiber membranes (AgNPs-PS/PET) composed of hydrophobic polystyrene (PS) embedded with different additions of silver nanoparticles (AgNPs) and hydrophilic hydrolyzed polyethylene terephthalate (PET) were prepared via electrospinning technology to achieve the function of unidirectional water penetration. The addition of [...] Read more.
In this study, the composite nanofiber membranes (AgNPs-PS/PET) composed of hydrophobic polystyrene (PS) embedded with different additions of silver nanoparticles (AgNPs) and hydrophilic hydrolyzed polyethylene terephthalate (PET) were prepared via electrospinning technology to achieve the function of unidirectional water penetration. The addition of AgNO3 was at 0 wt%, 0.5 wt%, 1.0 wt% and 1.5 wt% as the variables. The surface morphology and structure of AgNPs-PS/PET composite nanofibers were characterized by scanning electron microscopy (SEM), x-ray energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). The SEM image showed that the fibers of the composite materials were continuous and uniform as a result of electrospinning. The presence and content of Ag nanoparticles dispersed in the nanofibers were investigated using EDS and TEM. The contact angle (CA) was tested to illustrate the wettability of the composite nanofiber membranes using a static contact angle measuring instrument and the process of unidirectional water penetration was recorded. Meanwhile, the mechanism of unidirectional water penetration was analyzed. Moreover, the electrospinning solution’s viscosity and conductivity were also investigated. Eventually, the optimal addition of AgNO3 (1.0 wt%) was confirmed and the prepared AgNPs-PS/PET composite nanofiber membranes were able to achieve the function of unidirectional water penetration. These membranes have the potential to be applied in smart textiles, unidirectional water collection and wound dressing. Full article
(This article belongs to the Special Issue Surface Functionalization and Posttreatment for Advanced Membrane Fabrication)
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14 pages, 6286 KiB  
Article
Constructing a Hierarchical Hydrophilic Crosslink Network on the Surface of a Polyvinylidene Fluoride Membrane for Efficient Oil/Water Emulsion Separation
by Ruixian Zhang, Yuanbin Mo, Yanfei Gao, Zeguang Zhou, Xueyi Hou, Xiuxiu Ren, Junzhong Wang, Xiaokun Chu and Yanyue Lu
Membranes 2023, 13(3), 255; https://doi.org/10.3390/membranes13030255 - 21 Feb 2023
Cited by 4 | Viewed by 2147
Abstract
Oil/water mixtures from industrial and domestic wastewater adversely affect the environment and human beings. In this context, the development of a facile and improved separation method is crucial. Herein, dopamine was used as a bioadhesive to bind tea polyphenol (TP) onto the surface [...] Read more.
Oil/water mixtures from industrial and domestic wastewater adversely affect the environment and human beings. In this context, the development of a facile and improved separation method is crucial. Herein, dopamine was used as a bioadhesive to bind tea polyphenol (TP) onto the surface of a polyvinylidene fluoride (PVDF) membrane to form the first hydrophilic polymer network. Sodium periodate (NaIO4) is considered an oxidising agent for triggering self-polymerisation and can be used to introduce hydrophilic groups via surface manipulation to form the second hydrophilic network. In contrast to the individual polydopamine (PDA) and TP/NaIO4 composite coatings for a hydrophobic PVDF microfiltration membrane, a combination of PDA, TP, and NaIO4 has achieved the most facile treatment process for transforming the hydrophobic membrane into the hydrophilic state. The hierarchical superhydrophilic network structure with a simultaneous underwater superoleophobic membrane exhibited excellent performance in separating various oil-in-water emulsions, with a high water flux (1530 L.m−2 h−1.bar) and improved rejection (98%). The water contact angle of the modified membrane was 0° in 1 s. Moreover, the steady polyphenol coating was applied onto the surface, which endowed the membrane with an adequate antifouling and recovery capability and a robust durability against immersion in an acid, alkali, or salt solution. This facile scale-up method depends on in situ plant-inspired chemistry and has remarkable potential for practical applications. Full article
(This article belongs to the Special Issue Surface Functionalization and Posttreatment for Advanced Membrane Fabrication)
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