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Membranes, Volume 14, Issue 7 (July 2024) – 2 articles

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12 pages, 501 KiB  
Article
Surface Modification of Polyethylene Terephthalate Track-Etched Membranes by 2,2,3,3,4,4,5,5,6,6,7,7-Dodecafluoroheptyl Acrylate for Application in Water Desalination by Direct Contact Membrane Distillation
by Aigerim Kh. Shakayeva, Arman B. Yeszhanov, Alexander N. Borissenko, Murat T. Kassymzhanov, Ainash T. Zhumazhanova, Nikolai A. Khlebnikov, A. K. Nurkassimov, Maxim V. Zdorovets, Olgun Güven and Ilya V. Korolkov
Membranes 2024, 14(7), 145; https://0-doi-org.brum.beds.ac.uk/10.3390/membranes14070145 - 25 Jun 2024
Viewed by 58
Abstract
In this work, the surfaces of poly (ethylene terephthalate) track-etched membranes (PET TeMs) with pore sizes of 670–1310 nm were hydrophobized with 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl acrylate (DFHA) by photoinitiated graft polymerization. Attenuated total reflection FTIR spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) coupled to an energy-dispersive [...] Read more.
In this work, the surfaces of poly (ethylene terephthalate) track-etched membranes (PET TeMs) with pore sizes of 670–1310 nm were hydrophobized with 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl acrylate (DFHA) by photoinitiated graft polymerization. Attenuated total reflection FTIR spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) coupled to an energy-dispersive X-ray spectrometer (EDX), and contact angle measurements were used to identify and characterize the TeMs. The optimal parameters for graft polymerization were determined as follows: polymerization time of 60 min, monomer concentration of 30%, and distance from the UV source of 7 cm. The water contact angle of the modified membranes reached 97°, which is 51° for pristine membranes. The modified membranes were tested for water desalination using direct contact membrane distillation (DCMD) method. The effects of membrane pore size, the degree of grafting, and salt concentration on the performance of membrane distillation process were investigated. According to the results obtained, it has been concluded that large pore size hydrophobic TeMs modified by using DFHA could be used for desalinating water. Full article
(This article belongs to the Section Membrane Applications)
19 pages, 7137 KiB  
Review
Bibliometric and Visual Analysis of Studies on Ceramic Membranes: A Review
by Hao Xiong, Xianfu Chen, Jun Feng, Fan Zhang, Minghui Qiu, Qi Zhang and Yiqun Fan
Membranes 2024, 14(7), 144; https://0-doi-org.brum.beds.ac.uk/10.3390/membranes14070144 - 25 Jun 2024
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Abstract
As a high-performance separation material, the ceramic membrane has played a crucial role in addressing resource, energy, and environmental challenges. Here, we carried out literature retrieval and collection for the research of ceramic membranes based on the Web of Science. The retrieval strategy [...] Read more.
As a high-performance separation material, the ceramic membrane has played a crucial role in addressing resource, energy, and environmental challenges. Here, we carried out literature retrieval and collection for the research of ceramic membranes based on the Web of Science. The retrieval strategy was quantitatively evaluated from two dimensions: recall and precision. The distributions of publication time, journal, and related subjects were systematically analyzed. With the help of CiteSpace and VOSviewer, the literature was visually analyzed through the co-occurrence map of authors and the cluster network of keywords. The findings indicate a strong correlation between ceramic membrane research and the field of Chemical Engineering. A core group of authors has emerged as prominent contributors in this area of study. Additionally, there is a notable long-tail effect observed in the application of ceramic membranes. Despite their current low-frequency usage and high-volume potential, these applications hold substantial promise for future scientific research and industrial development. Full article
(This article belongs to the Section Inorganic Membranes)
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