Water vapor permeability in heterogeneous porous membranes: Analytical modeling and experimental characterization

Li, Guopei; Meng, Lulu; Wang, Junru; Chen, Gang; Wu, Xuehong; Su, Qianwen

doi:10.1016/j.icheatmasstransfer.2023.106950

Cited by 3 publications

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PVA film absorbed the most until the 18th day, then very little after that, while the PE film absorbed evenly over the 34 days. This fact is due to the hydrophilic character of PVA which, in the first phase, absorbs more water vapor, having a higher affinity with water and in the second phase, approaching the saturation state absorbs less, having fewer hydroxyl fractions available [34,35]. The difference between the WVTR values of PVA and PE films is statistically significant at 99% (p < 0.01) according to One-Way Anova, the Tukey model.…”

Section: Pva Filmmentioning

confidence: 93%

Attempts to Obtain Material Based on Polyvinyl Alcohol with Barrier Properties against Water Vapor

Pop,

Mihaly Cozmuta,

Nicula

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The purpose of this study was to obtain a biodegradable film based on polyvinyl alcohol with reduced water vapor permeability. The hydrophobic character of the films was achieved by incorporating beeswax, vegetable bio-surfactant, citric acid as a cross-linking agent, and glycerol to provide elasticity, along with the application of thermal treatment. Water vapor permeability was determined gravimetrically. The results indicated that all films produced had lower water vapor permeability compared to unmodified or untreated polyvinyl alcohol films. The barrier to water vapor varied directly with the mass of beeswax used, and the homogeneous dispersion of beeswax in the polyvinyl alcohol matrix was essential for achieving an efficient hydrophobic film. The best performing-material exhibited a water vapor permeability 5.15 times lower than that of the neat polyvinyl alcohol and 15 times higher than that of polyethylene. Considering the fact that the water vapor barrier property of neat polyvinyl alcohol was 78 times lower than that of polyethylene, the combination of beeswax, citric acid, and vegetable bio-surfactant—along with thermal treatment—can be a viable solution to reduce the hygroscopicity of polyvinyl alcohol-based films.

show abstract

Section: Pva Filmmentioning

confidence: 93%