Morphology and gas-permeation analyses for poly(ether sulfone)/poly(vinyl alcohol) electrolyte composite membranes in the facilitated transport process

2012 ◽  
Vol 129 (3) ◽  
pp. 1569-1585 ◽  
Author(s):  
M. Esmaeili ◽  
S. S. Madaeni ◽  
J. Barzin
Keyword(s):  
Vinyl Alcohol ◽  
Transport Process ◽  
Composite Membranes ◽  
Facilitated Transport ◽  
Gas Permeation ◽  
Poly Vinyl Alcohol

Changes in free volume and gas permeation properties of poly(vinyl alcohol) nanocomposite membranes modified using cage‐structured polyhedral oligomeric silsesquioxane

2020 ◽  
Vol 138 (10) ◽  
pp. 49953
Author(s):  
Valiya Parambath Swapna ◽  
Abitha Vayyaprontavida Kaliyathan ◽  
Vakkoottil Sivadasan Abhisha ◽  
Hanna Joseph Maria ◽  
Padinharu Madathil Gopalakrishnan Nambissan ◽  
...  
Keyword(s):  
Free Volume ◽  
Vinyl Alcohol ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Gas Permeation ◽  
Poly Vinyl Alcohol ◽  
Nanocomposite Membranes ◽  
Oligomeric Silsesquioxane ◽  
Permeation Properties

scholarly journals Single and binary protein electroultrafiltration using poly(vinyl-alcohol)-carbon nanotube (PVA-CNT) composite membranes

PLoS ONE ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. e0228973
Author(s):  
Raymond Yeung ◽  
Xiaobo Zhu ◽  
Terence Gee ◽  
Ben Gheen ◽  
David Jassby ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Vinyl Alcohol ◽  
Composite Membranes ◽  
Poly Vinyl Alcohol

Preparation of electrospun silver/poly(vinyl alcohol) fibrous membranes and characterization of the effect of sterilization processes on the antibacterial activity

2020 ◽  
pp. 152808372091334 ◽  
Author(s):  
Wen-Cheng Chen ◽  
Chia-Ying Ko ◽  
Kai-Chi Chang ◽  
Chih-Hua Chen ◽  
Dan-Jae Lin
Keyword(s):  
Vinyl Alcohol ◽  
Antimicrobial Agents ◽  
Uv Light ◽  
Silver Ions ◽  
Composite Membranes ◽  
Antibacterial Activities ◽  
Poly Vinyl Alcohol ◽  
Preheat Treatment ◽  
Fibrous Membranes

Silver ions (Ag+) and silver nanoparticles (AgNPs) are effective antimicrobial agents that act against a broad spectrum of bacteria. The releasing quantitation of free Ag+ is exclusively responsible for the biological toxicity, while limiting the free Ag+ in AgNPs or in polymers would largely ease the conditions. In this study, the different concentrations of silver nitrate (AgNO3) in poly(vinyl alcohol) (PVA) and an optional preheat treatment on the spinning solution before electrospinning to form the Ag+/AgNPs/PVA fibrous membranes through electrospinning technology were investigated. The morphologies, AgNPs dispersity within the PVA matrix, and the sterilizations (UV irradiation and autoclave) for Ag+/AgNPs/PVA fibrous membranes were characterized. The antibacterial activities of Ag/PVA composite membranes combined with the in-house prepared light-cured resin were also investigated. Results showed that the AgNPs/PVA fibrous membranes with antibacterial capability can be produced with the addition of at least 5 wt.% of AgNO3 to PVA. The antibacterial activities of Ag content in the PVA matrix were increased in the high presence of Ag. Noteworthy, the antibacterial enhancing effect was observed for the spinning solution groups after preheating treatment at 100°C for 1 h. The result suggests that Ag/PVA fibrous membranes sterilized by autoclave hindered antibacterial effectiveness due to the significant particle size changes in the generation of large-sized AgNPs. Nevertheless, the direct application of UV light irradiation to Ag/PVA fibrous membranes preserves their active antibacterial profile against Staphylococcus aureus and Escherichia coli. We also demonstrated that these designed AgNPs/PVA composite membranes can equip the resin with an active antibacterial capability, could benefit from the prevented bacteria breeding in microleakages and thus further reduce the possibility for secondary caries.

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