Article
Chemistry, Multidisciplinary
Shun Aoyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, a novel atmospheric-pressure water vapor plasma modification method was developed to enhance the pervaporation performance of organosilica membranes. The plasma treatment significantly improved the surface hydrophilicity and molecular sieving properties of the membranes, leading to high selectivity and permeance in the dehydration of alcohol solutions.
Article
Engineering, Chemical
Lingchen Kong, Eric Palacios, Xun Guan, Meng Shen, Xitong Liu
Summary: This study demonstrates that modifying a commercial anion exchange membrane (AEM) with a hydrophobic polymer, polypyrrole (PPy), enhances the transport selectivity of nitrate over chloride and sulfate ions. The improved selectivity is attributed to the decoupling of the ion partition and diffusion within the polymer phase, resulting in enhanced ion transport selectivity between like-charged ions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Lydia N. Rodrigues, Kamalesh K. Sirkar, Kirk Ryan Weisbrod, John C. Ahern, Uwe Beuscher
Summary: This study focused on the application of porous membranes with specific wetting characteristics in nondispersive membrane solvent extraction, proposing solutions to address issues caused by pressure differences. By developing Janus membranes, successful nondispersive solvent extractions were conducted for two systems, indicating the potential practical utility of this technique.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biophysics
Fen Ao, Xiaomin Luo, Wen Shen, Xuemei Ge, Pengni Li, Yan Zheng, Shang Wu, Yueyang Mao, Yali Luo
Summary: A multilayer electrospun membrane with hydrophobic/hydrophilic gradients and controlled drug release properties was designed and prepared using sequential electrospinning technology. This membrane could extract water directly from a hydrophobic layer to a hydrophilic layer, allowing for unidirectional transport of liquids. The drug release behavior of this wound dressing followed the Korsmeyer-Peppas model and showed excellent therapeutic potential for diabetic patients.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Engineering, Environmental
A. Rahimalimamaghani, D. A. Pacheco Tanaka, M. A. Llosa Tanco, F. Neira D'Angelo, F. Gallucci
Summary: Tubular supported carbon molecular sieve membranes (CMSMs) with high hydrophilicity and perm-selectivities for water suitable for ethanol dehydration were developed. The membranes showed high selectivity with one-layer coating and could potentially replace traditional ethanol dehydration methods, offering higher performance and reducing the final price of bioethanol as a sustainable energy source.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Swastika Choudhury, Samit Kumar Ray
Summary: The addition of polymer nanoparticles significantly enhances the separation characteristics of polymer membranes for various applications, providing improved flux and selectivity. The use of low cost chitosan-coated polyacrylonitrile nanoparticles presents a promising alternative to expensive inorganic nanoparticles for membrane modification.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Rafael M. Madero-Castro, Sofia Calero, A. Ozgur Yazaydin
Summary: Dehydration of bioalcohols is a major cost factor in biofuel production, and this study investigates the liquid phase separation of water from methanol and ethanol in a siliceous MFI pervaporation membrane. Molecular dynamic simulations show that hydrogen bonding between water and alcohol molecules may hinder complete alcohol selectivity, but suggest the potential for functionalizing membrane surfaces to overcome this issue and improve separation efficiency.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biophysics
Hanne S. Antila, Anika Wurl, O. H. Samuli Ollila, Markus S. Miettinen, Tiago M. Ferreira
Summary: Cells maintain an optimal composition of lipids in their membranes through homeostatic mechanisms. Researchers have used advanced techniques to study lipid membranes and found that the rotational dynamics of choline headgroups remain relatively unchanged with the incorporation of cholesterol, unlike other phospholipid segments. This suggests a new paradigm in which phospholipid dipole headgroups interact independently at the membrane interface.
BIOPHYSICAL JOURNAL
(2022)
Article
Chemistry, Physical
Jia Hui Chen, Wei Ting Gao, Yvonne Shuen Lann Choo, Xue Lang Gao, Ying Jie Liu, Xi Bin Yue, Xi Hao Wang, Ai Mei Zhu, Qiu Gen Zhang, Qing Lin Liu
Summary: A series of anion exchange membranes (AEMs) with semi-interpenetrating polymer network (sIPN) incorporating crosslinked poly(biphenyl N-methylpiperidine) (PBP) and spirobisindane-based intrinsically microporous poly(ether ketone) (PEK-SBI) have been prepared to achieve high ionic conductivity and improved chemical stability. The AEMs exhibit phase separated structures, promoting the hydroxide ion conductivity. Among them, the sIPN-90/10(PEK-SBI) AEM shows the highest hydroxide ion conductivity of 122.4 mS cm-1 and good alkaline stability. Moreover, it can achieve a peak power density of 481 mW cm-2 in a hydrogen/oxygen single cell.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Chemical
Quan Liu, Minggong Chen, Longlong Sun, Gongping Liu, Rong Xu
Summary: The study investigates the effect of pore density (PPI) on the separations of water/ethanol and methanol/ethanol mixtures through graphene oxide (GO) membranes. It is found that the fluxes of water and methanol linearly increase with PPI due to enhanced diffusivity and reduced permeation barrier. However, large PPIs sacrifice separation factors. The study provides a theoretical basis for designing high-performance GO membranes for ethanol dehydration and methanol recovery.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Lerys Granado, Celine Burel, Remi Giordanengo, Ahmed Alsayed, Denis Bendejacq, Francois Ganachaud
Summary: This study presents a simple pathway to generate water-filled microcapsule dispersions and describes the process of preparing single hollow capsules as well as double microcapsules, which are visualized with different fluorescent markers to illustrate their complexity.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Biomedical
Parathan Ramamurthi, Zhongchao Zhao, Eamonn Burke, Nicole F. Steinmetz, Markus Mullner
Summary: Nanoparticle-based drug delivery systems show promise in cancer therapy, with superior selectivity and tumor accumulation compared to small-molecule therapeutics. This study examines the role of molecular polymer bottlebrushes (MPBs) as potential drug delivery vehicles, specifically focusing on the influence of hydrophobicity levels on cell association and tumor homing. The results demonstrate that increasing hydrophobicity in MPBs leads to enhanced tumor accumulation and homing, highlighting the importance of hydrophilic-hydrophobic balance in MPB composition.
ADVANCED HEALTHCARE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Shuping Jia, Liqin Hao, Yujie Liu, En Lin, Wansheng Liu, Yi Yang, Yongjun Tian, Yunlei Peng, Peng Cheng, Yao Chen, Zhenjie Zhang
Summary: Solar-powered clean water production is an efficient solution to the global water shortage challenge. The designed COF membranes demonstrate excellent performance and reusability in solar steam generation for clean water and desalination.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Shayna M. Rumrill, Vivek Agarwal, Kenneth K. S. Lau
Summary: By tuning reactor conditions, hydrophilic PHEMA was successfully deposited onto hydrophobic PTFE surfaces, transforming the water contact angle from approximately 110 degrees to 20 degrees.
Article
Engineering, Chemical
Abu Zafar Al Munsur, Junghwa Lee, Ji Eon Chae, Hyoung-Juhn Kim, Chi Hoon Park, Sang Yong Nam, Tae-Hyun Kim
Summary: The new hydrophilic-hydrophobic comb-type anion exchange membrane showed enhanced hydrophobicity compared to its non-fluorinated counterpart. It exhibited the highest hydroxide ion conductivity and improved mechanical properties. Its cell performance was significantly higher than other types of SEBS membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)