Multilayer poly(vinyl alcohol)–zeolite 4A composite membranes for ethanol dehydration by means of pervaporation

2006 ◽  
Vol 51 (2) ◽  
pp. 126-136 ◽  
Author(s):  
Z HUANG ◽  
Y SHI ◽  
R WEN ◽  
Y GUO ◽  
J SU ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Composite Membranes ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration ◽  
Zeolite 4A

High Performance Poly (Vinyl Alcohol)-Zeolite LTA Composite Membranes for Ethanol Dehydration Pervaporation

2011 ◽  
Vol 287-290 ◽  
pp. 2053-2056
Author(s):  
Zhen Huang ◽  
Wei Juan Jiang ◽  
Xiao Han Shi ◽  
Li Jun Teng
Keyword(s):  
Separation Factor ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Composite Membranes ◽  
Ethanol Solution ◽  
Poly Vinyl Alcohol ◽  
Processing Temperature ◽  
Ethanol Dehydration ◽  
Zeolite Lta ◽  
Separation Performances

Three-layered zeolite LTA-filled poly (vinyl alcohol) (PVA) composite membranes have been fabricated for water removal from highly concentrated ethanol solution by means of pervaporation. Higher separation factor and higher fluxes are both achieved after adding zeolite 3A, 4A and 5A. Through evaluating separation factor and permeation flux, separation performances of the composite membranes are elucidated in terms of the zeolite pore size and processing temperature.

Effect of silver-nanoparticles generated in poly (vinyl alcohol) membranes on ethanol dehydration via pervaporation

2019 ◽  
Vol 27 (7) ◽  
pp. 1595-1607 ◽  
Author(s):  
Asmaa Selim ◽  
Andras Jozsef Toth ◽  
Daniel Fozer ◽  
Eniko Haaz ◽  
Nóra Valentínyi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration

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

scholarly journals Poly(vinyl alcohol)-Modified Membranes by Ti3C2Tx for Ethanol Dehydration via Pervaporation

ACS Omega ◽  
2020 ◽  
Vol 5 (12) ◽  
pp. 6277-6287
Author(s):  
Weibin Cai ◽  
Xue Cheng ◽  
Xiaohan Chen ◽  
Jiding Li ◽  
Junqi Pei
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration

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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