Preparation and properties of waterborne polyurethane-urea/poly(vinyl alcohol) blends for high water vapor permeable coating materials

2007 ◽  
Vol 15 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Jong-Kook Yun ◽  
Hye-Jin Yoo ◽  
Han-Do Kim
Keyword(s):  
Water Vapor ◽  
Vinyl Alcohol ◽  
Waterborne Polyurethane ◽  
High Water ◽  
Poly Vinyl Alcohol ◽  
Coating Materials

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.

Designing kaolin-reinforced bionanocomposites of poly(vinyl alcohol)/gelatin and study of their mechanical and water vapor transmission behavior

2019 ◽  
Vol 76 (11) ◽  
pp. 5791-5811 ◽  
Author(s):  
Manjulata Shrungi ◽  
Anjana Goswami ◽  
Jaya Bajpai ◽  
A. K. Bajpai
Keyword(s):  
Water Vapor ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Water Vapor Transmission

Strong adhesion of poly(vinyl alcohol)–glycerol hydrogels onto metal substrates for marine antifouling applications

Soft Matter ◽  
2020 ◽  
Vol 16 (3) ◽  
pp. 709-717 ◽  
Author(s):  
Heng-Wei Zhu ◽  
Jia-Nan Zhang ◽  
Pei Su ◽  
Tianqi Liu ◽  
Changcheng He ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Coating Materials ◽  
Metal Substrates ◽  
Antifouling Coating ◽  
Strong Adhesion ◽  
Adhesion Stability ◽  
Hydrogel Coating ◽  
Marine Antifouling

PVA–glycerol gels, which were adhered onto metal substrates by using adhesives, were employed as robust antifouling coating materials. The adhesion stability and antifouling performances of the hydrogel coating against barnacles were investigated.

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