PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 5, Number 1, 2019
Solid Wood and Wood Based Composites: The Challenge of Sustainability Looking for a Short and Smart Supply Chain, M. Romagnoli et al, Digital Wood Design , Chapter, pp.783-807. (Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 24).) The paper takes into account the most important wood based products used in architecture, structural engineering and design. The amount of roundwood, sawnwood and wood panel production is analysed and forest certification is reported as possible tool to ensure a sustainable forest management, fighting illegal logging and deforestation. A smart review of the most used wood-based products is performed together with the chance to activate a modern short supply chain. The state of art of the wood species actually used is considered together with most important actual challenges addressed to obtain sustainable wood-based products referring to eco-friendly process of gluing and increasing durability. Preparation, characterization and properties of starch-based adhesive for wood- based panels, YongGu et al, International Journal of Biological Macromolecules , online. A new biodegradable, renewable, and environmentally friendly starch-based adhesive for wood-based panels was synthesised. The synthesis was conducted by grafting polymerisation of vinyl acetate (VAC) monomer onto corn starch and crosslinking polymerisation with N-methylol acrylamide (NMA). Compared with the traditional starch- based wood adhesive, the water resistance of starch-based adhesive with NMA (SWA-N) was greatly improved to more than 1 MPa; this exceeds the Chinese standard by 40%. The complex network structure was found to inhibit excessive expansion of the adhesive during high temperature pressing and water absorption. As a result, the adhesive remained intact when subjected to hot pressing and placed in wet conditions. Latex and rosin films as alternative waterproofing coatings for 3-layer sugarcane- bamboo-based particleboards, Erika Yukari Nakanishi et al, Polymer Testing , Vol.75. This paper studied two alternative polymeric films based on natural latex and rosin as a waterproofing coating for 3-layer sugarcane-bamboo-based particleboards (3LP). To study the roughness as well as evaluate the coating surfaces on the 3LP, scanning confocal electron microscopy (SCEM) was used. The wettability performance of the coatings was evaluated by the surface energy through the contact angle method. The 3LP coated thermal, physical and mechanical properties were evaluated following ASTM-E1530: 2011 and ABNT NBR 14810 standards, respectively. Latex successfully formed a smooth and continuous film which covered the surface pores of the 3LP, whereas rosin did not form a smooth and continuous, forming only a thin film on the 3LP. Dynamic accounting of greenhouse gas emissions from cascading utilisation of wood waste, Giorgia Faraca et al, Science of The Total Environment , Vol.651 (2). Cascading utilisation of post-consumer wood waste has recently gained increasing attention in the European Union, aiming for a society in which the resource's properties are optimised through sequential uses. To date, material utilisation of wood waste has been limited to particleboard production, with additional niche alternatives being restricted by quality requirements for wood waste. In this consequential life cycle assessment focusing on post-consumer wood collected at Danish recycling centres, Global Warming Potential (GWP) impacts from quality-driven choices for cascading management of wood waste were compared with those from handling mixed wood waste qualities. The results demonstrated that valuing quality over quantity in wood waste management can ensure larger GWP savings, especially if recycling applications have a long lifetime and/or substitute energy-intensive products; such results were confirmed under all scenario analyses. More cascade steps of the wood waste resource ensured larger savings.
Technical Abstracts
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