Critical links governing performance of self-binding and natural binders for hot-pressed reconstituted lignocellulosic board without added formaldehyde: a review

• Main Authors: Hubbe, Martin A., Pizzi, Anthony, Haiyang, Zhang, Halis, Rasmina
• Format: Article
• Language: English
• Published: North Carolina State University 2017
• Online Access: http://psasir.upm.edu.my/id/eprint/61250/1/Critical%20links%20governing%20performance%20of%20self-binding%20and%20natural%20binders%20for%20hot-pressed%20reconstituted%20lignocellulosic%20board%20without%20added%20formaldehyde%20a%20review.pdf; http://psasir.upm.edu.my/id/eprint/61250/; http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_13_1_Hubbe_Review_Binders_Reconstituted_Lignocellulosic_Board
• Institution: Universiti Putra Malaysia

The production of fiberboard, particleboard, and related hot-pressed biomass products can convert small, relatively low-valued pieces of wood into valuable products. There is strong interest in being able to manufacture such products without the addition of formaldehyde, which is a health hazard during both production and use. This article reviews literature describing various challenges that need to be faced in order to achieve satisfactory bonding properties in hot-pressed bio-based board products without the addition of formaldehyde. Bonding mechanisms are examined in the form of a hypothesis, in which the strength development is represented by a chain with four links. Failure of a board is expected to occur at the weakest of these mechanistic links, which include mechanical contact, molecular-scale wetting and contact, various chemical-based linkages, and structural integrity. The most promising technologies for environmentally friendly production of hot-pressed board with use of lignocellulosic materials tend to be those that favor success in the development of at least three of the mechanistic links in the hypothetical chain.