Effect of hygroscopic materials on water vapor permeation and dehumidification performance of poly(vinyl alcohol) membranes

2017 ◽  
Vol 134 (17) ◽  
Author(s):  
T.D. Bui ◽  
Y. Wong ◽  
K. Thu ◽  
S.J. Oh ◽  
M. Kum Ja ◽  
...  
Keyword(s):  
Water Vapor ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Vapor Permeation ◽  
Water Vapor Permeation

Preparation and properties of poly (vinyl alcohol)/sodium caseinate blend films crosslinked with glutaraldehyde and glyoxal

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bedriye Ucpinar Durmaz ◽  
Ayse Aytac
Keyword(s):  
Water Vapor ◽  
Vinyl Alcohol ◽  
Sodium Caseinate ◽  
Barrier Properties ◽  
Poly Vinyl Alcohol ◽  
Infrared Analysis ◽  
Crosslinking Reaction ◽  
Water Contact ◽  
Casting Technique ◽  
Water Vapor Barrier

Abstract Bio-based films containing poly (vinyl alcohol)/casein have poor mechanical and water vapor barrier properties that limit their use in packaging application. Some properties such as water resistance and tensile strength can be increased by the cross-linking process. For this reason, poly(vinyl alcohol)/sodium caseinate (PVA/SC) blends were crosslinked by adding glutaraldehyde (GLA) and glyoxal (GL) at different ratios in this work. The films were prepared by solution casting technique. Fourier transform infrared analysis (FTIR) confirmed the crosslinking reaction between the components. As a result of the crosslinking, the thicknesses, water vapor barrier properties and water contact angle values of the films have increased. The total soluble matters (TSM) of PVA/SC film decreased with increasing amounts of crosslinkers and GLA crosslinked films exhibited lower TSM. The addition of GLA and GL resulted in more strengthened films as verified by the tensile test. On the other hand, GLA crosslinked films were more flexible than un-crosslinked and GL crosslinked PVA/SC films. The hydrophilic PVA/SC film became more hydrophobic with the increasing amounts of crosslinkers. With the crosslinking, the PVA/SC film became more thermally stable. In conclusion, the crosslinked PVA/SC films were obtained with suitable properties for packaging applications.

Selective water vapor permeation from steam/non-condensable gas mixtures via organosilica membranes at moderate-to-high temperatures

2019 ◽  
Vol 589 ◽  
pp. 117254 ◽  
Author(s):  
Norihiro Moriyama ◽  
Hiroki Nagasawa ◽  
Masakoto Kanezashi ◽  
Toshinori Tsuru
Keyword(s):  
Water Vapor ◽  
High Temperatures ◽  
Gas Mixtures ◽  
Vapor Permeation ◽  
Water Vapor Permeation

The Effect of Thermal Reduction on the Water Vapor Permeation in Graphene Oxide Membranes

2014 ◽  
Vol 1 (8) ◽  
pp. 1400250 ◽  
Author(s):  
Konstantinos S. Andrikopoulos ◽  
Giannis Bounos ◽  
Dimitrios Tasis ◽  
Lamprini Sygellou ◽  
Vassilios Drakopoulos ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Vapor ◽  
Thermal Reduction ◽  
Vapor Permeation ◽  
Oxide Membranes ◽  
Water Vapor Permeation ◽  
Graphene Oxide Membranes

Water vapor permeation behavior of interfacially polymerized polyamide thin film on hollow fiber membrane substrate

2016 ◽  
Vol 60 ◽  
pp. 623-635 ◽  
Author(s):  
Muhammad Irshad Baig ◽  
Pravin G. Ingole ◽  
Won Kil Choi ◽  
Seong Ryong Park ◽  
Eun Chul Kang ◽  
...  
Keyword(s):  
Thin Film ◽  
Water Vapor ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Vapor Permeation ◽  
Water Vapor Permeation
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