Water-Vapor-Barrier Coatings for Polyurethane Foams

1976 ◽  
Author(s):  
J. M. Boyd ◽  
David Van Daalen
Keyword(s):  
Water Vapor ◽  
Polyurethane Foams ◽  
Barrier Coatings ◽  
Water Vapor Barrier

Correction to Creating Water Vapor Barrier Coatings from Hydrophilic Components

2014 ◽  
Vol 6 (2) ◽  
pp. 1337-1337
Author(s):  
Gerald Findenig ◽  
Simon Leimgruber ◽  
Rupert Kargl ◽  
Stefan Spirk ◽  
Karin Stana-Kleinschek ◽  
...  
Keyword(s):  
Water Vapor ◽  
Barrier Coatings ◽  
Water Vapor Barrier

scholarly journals Reactive Water Vapor Barrier Coatings Derived from Cellulose Undecenoyl Esters for Paper Packaging

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1032
Author(s):  
Chengrong Qin ◽  
Wei Wang ◽  
Wei Li ◽  
Song Zhang
Keyword(s):  
Water Vapor ◽  
Mechanical Performance ◽  
Condensation Reaction ◽  
Guanidine Hydrochloride ◽  
Packaging Materials ◽  
Coated Paper ◽  
Cellulose Esters ◽  
Barrier Coatings ◽  
Water Vapor Barrier ◽  
Antibacterial Performance

Paper packaging materials have been widely applied in our daily life. To maintain the quality of packed goods as well as the mechanical property, there is a need to enhance the paper water vapor barrier function. Although long-chain cellulose esters with saturated aliphatic chains have been employed as barrier coatings due to their excellent hydrophobicity as well as film-forming properties, the coated unsaturated cellulose esters would be beneficial to design reactive materials to further enrich their functionalities, e.g., antibacterial performance. Herein, solutions of cellulose undecenoyl esters (CUEs) were bar-coated to base papers. Obvious coating films were formed on the paper surfaces from the coating grammage of 6.25 g m−2. The resulting CUE-coated papers displayed good mechanical performance, hydrophobicity, and water vapor barrier property (the barrier ratio up to 66.35%), and the best coating grammage was 11.62 g m−2. Additionally, the reactivity of the coated paper was evaluated by further immobilization of the antibacterial agent (polyhexamethylene guanidine hydrochloride (PHGH)) using photo-click thiol-ene and condensation reaction. The generated paper exhibited good antibacterial and water vapor barrier performance. The obvious reactivity of our CUE-coated paper indicated the great possibility to design multi-functional paper packaging materials.

Creating Water Vapor Barrier Coatings from Hydrophilic Components

2012 ◽  
Vol 4 (6) ◽  
pp. 3199-3206 ◽  
Author(s):  
Gerald Findenig ◽  
Simon Leimgruber ◽  
Rupert Kargl ◽  
Stefan Spirk ◽  
Karin Stana-Kleinschek ◽  
...  
Keyword(s):  
Water Vapor ◽  
Barrier Coatings ◽  
Water Vapor Barrier

scholarly journals Organic-Inorganic Hybrid Planarization and Water Vapor Barrier Coatings on Cellulose Nanofibrils Substrates

2018 ◽  
Vol 6 ◽  
Author(s):  
Feyza Karasu ◽  
Luca Müller ◽  
Hassan Ridaoui ◽  
Mohammed Ibn ElHaj ◽  
Göran Flodberg ◽  
...  
Keyword(s):  
Water Vapor ◽  
Cellulose Nanofibrils ◽  
Barrier Coatings ◽  
Inorganic Hybrid ◽  
Water Vapor Barrier

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.

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