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Polymers 2017, 9(2), 70; doi:10.3390/polym9020070

Bio-Based Adhesives and Evaluation for Wood Composites Application

Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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Academic Editor: Antonio Pizzi
Received: 31 December 2016 / Revised: 7 February 2017 / Accepted: 10 February 2017 / Published: 17 February 2017
(This article belongs to the Special Issue Renewable Polymeric Adhesives)
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Abstract

There has been a rapid growth in research and innovation of bio-based adhesives in the engineered wood product industry. This article reviews the recent research published over the last few decades on the synthesis of bio-adhesives derived from such renewable resources as lignin, starch, and plant proteins. The chemical structure of these biopolymers is described and discussed to highlight the active functional groups that are used in the synthesis of bio-adhesives. The potentials and drawbacks of each biomass are then discussed in detail; some methods have been suggested to modify their chemical structures and to improve their properties including water resistance and bonding strength for their ultimate application as wood adhesives. Moreover, this article includes discussion of techniques commonly used for evaluating the petroleum-based wood adhesives in terms of mechanical properties and penetration behavior, which are expected to be more widely applied to bio-based wood adhesives to better evaluate their prospect for wood composites application. View Full-Text
Keywords: bio-based adhesives; lignin; starch; protein plants; adhesive evaluation; wood composites bio-based adhesives; lignin; starch; protein plants; adhesive evaluation; wood composites
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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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Ferdosian, F.; Pan, Z.; Gao, G.; Zhao, B. Bio-Based Adhesives and Evaluation for Wood Composites Application. Polymers 2017, 9, 70.

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