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Membranes
Special Issues
Latest Development and Application of Ceramic Membranes for Sustainability
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Latest Development and Application of Ceramic Membranes for Sustainability

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

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 7468

Special Issue Editors

Dr. Qilin Gu

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore
Interests: ceramic membrane; microstructure engineering; water treatment; filtration; membrane fouling
Dr. Dong Zou

E-Mail Website
Guest Editor
Membrane Laboratory, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Korea
Interests: ceramic membrane; low cost membrane; membrane disstillation; water treatment

Special Issue Information

Dear Colleagues,

Ceramic membranes have been well recognized as a kind of competitive membrane material for uses related to sustainability, such as water and wastewater treatment, because of their intrinsic hydrophilicity and excellent mechanical, chemical, and temperature stability. Ceramic membranes generally possess an asymmetric multilayered structure, where the fine top layer is supported by macroporous supports and, commonly, one or more intermediate layers are required to bridge the two. As a result, the fabrication process of ceramic membranes involves several rounds of coating–drying–sintering, which is time-consuming and requires high amounts of energy. The wide application of ceramic membranes, therefore, has been largely hindered by their relatively high fabrication cost.

The fabrication cost of ceramic membranes is mainly determined by the raw materials used, energy consumption, and time cost. In this regard, the use of cheaper raw materials can directly reduce the cost. At the same time, all these innovations in techniques, processes, and membrane structure that are able to shorten the processing period and energy consumption will discount the fabrication cost. Moreover, further improvement in the performance of ceramic membranes, such as regarding their antifouling, ease of regeneration, and self-cleaning abilities, can minimize maintenance costs during operation and thereby offset fabrication costs.

This Special Issue “Latest Developments and Applications of Ceramic Membranes for Sustainability” seeks contributions involving the development of new technologies, processes, and concepts in ceramic membranes and their application toward achieving a sustainable society. Authors are invited to submit their latest results; both original research papers and reviews are welcome. Topics of interest include but are not limited to:

  • Advanced manufacturing techniques and processes for ceramic membranes;
  • Ceramic membranes with new microstructure;
  • Low-cost fabrication of ceramic membranes;
  • Emerging application of ceramic membranes.

Dr. Qilin Gu
Dr. Dong Zou
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 2700 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

  • ceramic membranes
  • advanced manufacturing
  • microstructure engineering
  • membrane filtration
  • low-cost fabrication
  • sustainable application
  • water and wastewater treatment

Published Papers (2 papers)

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Research

11 pages, 3555 KiB  
Article
Rational Design and Porosity of Porous Alumina Ceramic Membrane for Air Bearing
by Jianzhou Du, Duomei Ai, Xin Xiao, Jiming Song, Yunping Li, Yuansheng Chen, Luming Wang and Kongjun Zhu
Membranes 2021, 11(11), 872; https://doi.org/10.3390/membranes11110872 - 12 Nov 2021
Cited by 7 | Viewed by 2700
Abstract
Air bearing has been widely applied in ultra-precision machine tools, aerospace and other fields. The restrictor of the porous material is the key component in air bearings, but its performance is limited by the machining accuracy. A combination of optimization design and material [...] Read more.
Air bearing has been widely applied in ultra-precision machine tools, aerospace and other fields. The restrictor of the porous material is the key component in air bearings, but its performance is limited by the machining accuracy. A combination of optimization design and material modification of the porous alumina ceramic membrane is proposed to improve performance within an air bearing. Porous alumina ceramics were prepared by adding a pore-forming agent and performing solid-phase sintering at 1600 °C for 3 h, using 95-Al2O3 as raw material and polystyrene microspheres with different particle sizes as the pore-forming agent. With 20 wt.% of PS50, the optimum porous alumina ceramic membranes achieved a density of 3.2 g/cm3, a porosity of 11.8% and a bending strength of 150.4 MPa. Then, the sintered samples were processed into restrictors with a diameter of 40 mm and a thickness of 5 mm. After the restrictors were bonded to aluminum shells for the air bearing, both experimental and simulation work was carried out to verify the designed air bearing. Simulation results showed that the load capacity increased from 94 N to 523 N when the porosity increased from 5% to 25% at a fixed gas supply pressure of 0.5 MPa and a fixed gas film thickness of 25 μm. When the gas film thickness and porosity were fixed at 100 μm and 11.8%, respectively, the load capacity increased from 8.6 N to 40.8 N with the gas supply pressure having been increased from 0.1 MPa to 0.5 MPa. Both experimental and simulation results successfully demonstrated the stability and effectiveness of the proposed method. The porosity is an important factor for improving the performance of an air bearing, and it can be optimized to enhance the bearing’s stability and load capacity. Full article
(This article belongs to the Special Issue Latest Development and Application of Ceramic Membranes for Sustainability)
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17 pages, 39717 KiB  
Article
Ceramic Processing of Silicon Carbide Membranes with the Aid of Aluminum Nitrate Nonahydrate: Preparation, Characterization, and Performance
by Esra Eray, Victor Manuel Candelario and Vittorio Boffa
Membranes 2021, 11(9), 714; https://doi.org/10.3390/membranes11090714 - 17 Sep 2021
Cited by 10 | Viewed by 4141
Abstract
The development of a low-cost and environmentally-friendly procedure for the fabrication of silicon carbide (SiC) membranes while achieving good membrane performance is an important goal, but still a big challenge. To address this challenge, herein, a colloidal coating suspension of sub-micron SiC powders [...] Read more.
The development of a low-cost and environmentally-friendly procedure for the fabrication of silicon carbide (SiC) membranes while achieving good membrane performance is an important goal, but still a big challenge. To address this challenge, herein, a colloidal coating suspension of sub-micron SiC powders was prepared in aqueous media by employing aluminum nitrate nonahydrate as a sintering additive and was used for the deposition of a novel SiC membrane layer onto a SiC tubular support by dip-coating. The sintering temperature influence on the structural morphology was studied. Adding aluminum nitrate nonahydrate reduced the sintering temperature of the as-prepared membrane compared to conventional SiC membrane synthesis. Surface morphology, pore size distribution, crystalline structure, and chemical and mechanical stability of the membrane were characterized. The membrane showed excellent corrosion resistance in acidic and basic medium for 30 days with no significant changes in membrane properties. The pure water permeance of the membrane was measured as 2252 L h−1 m−2 bar−1. Lastly, the final membrane with 0.35 µm mean pore size showed high removal of oil droplets (99.7%) in emulsified oil-in-water with outstanding permeability. Hence, the new SiC membrane is promising for several industrial applications in the field of wastewater treatment. Full article
(This article belongs to the Special Issue Latest Development and Application of Ceramic Membranes for Sustainability)
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