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Coatings 2015, 5(4), 887-930;

Bio-Based Coatings for Paper Applications

Freiburg Institute for Advanced Studies (FRIAS), Chair for Bio-based Materials Engineering, Faculty for Environment and Natural Resources, University of Freiburg, Werthmannstrasse 6, Freiburg 79085, Germany
Hermann Staudinger Graduate School, University of Freiburg, Hebelstrasse 27, Freiburg 79104, Germany
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Rafael L. Quirino
Received: 4 September 2015 / Accepted: 18 November 2015 / Published: 20 November 2015
(This article belongs to the Special Issue Coatings and Sustainability)
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The barrier resistance and wettability of papers are commonly controlled by the application of petroleum-based derivatives such as polyethylene, waxes and/or fluor- derivatives as coating. While surface hydrophobicity is improved by employing these polymers, they have become disfavored due to limitations in fossil-oil resources, poor recyclability, and environmental concerns on generated waste with lack of biodegradation. Alternatively, biopolymers including polysaccharides, proteins, lipids and polyesters can be used to formulate new pathways for fully bio-based paper coatings. However, difficulties in processing of most biopolymers may arise due to hydrophilicity, crystallization behavior, brittleness or melt instabilities that hinder a full exploitation at industrial scale. Therefore, blending with other biopolymers, plasticizers and compatibilizers is advantageous to improve the coating performance. In this paper, an overview of barrier properties and processing of bio-based polymers and their composites as paper coating will be discussed. In particular, recent technical advances in nanotechnological routes for bio-based nano- composite coatings will be summarized, including the use of biopolymer nanoparticles, or nanofillers such as nanoclay and nanocellulose. The combination of biopolymers along with surface modification of nanofillers can be used to create hierarchical structures that enhance hydrophobicity, complete barrier protection and functionalities of coated papers. View Full-Text
Keywords: paper coating; biopolymers; barrier properties; bionanocomposites paper coating; biopolymers; barrier properties; bionanocomposites

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Rastogi, V.K.; Samyn, P. Bio-Based Coatings for Paper Applications. Coatings 2015, 5, 887-930.

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