Abstract
Supplementation of Natural Tannins as an Alternative to Formaldehyde in Urea and Melamine Formaldehyde Resins used in MDF Production
Highlights
IntroductionOver the past few decades, as a result of environmental awareness, the problem of air pollution in residential buildings increased more and more concerns on indoor air pollutants such as formaldehyde and acetaldehyde to be released from building materials and products
The highest modulus of rupture (MOR) (27.12 N/mm2) and modulus of elasticity (MOE) (2685 N/mm2) values were measured for fiberboard produced employing neat melamine formaldehyde (MF) resin
The average MOE values of the panels with tannin content decreased from 10.4 % to 14.9 % as compared to values of the panels made with unmodified MF resin
Summary
Over the past few decades, as a result of environmental awareness, the problem of air pollution in residential buildings increased more and more concerns on indoor air pollutants such as formaldehyde and acetaldehyde to be released from building materials and products. The release of formaldehyde from the panels used for internal applications is one of the main factors that cause sick building syndrome known indoor. The demand for wood composites such as medium density fiberboard, oriented strand board (OSB), plywood, hardboard and veneer products has recently increased significantly all over the world (Pirayesh and Saadatnia, 2015). Solving old and new challenges and movement towards green chemistry will require human unity and creativity. A new approach will be needed to make better and greater use of renewable resources, and increase the resilience and diversity of production systems (Salari et al, 2013).
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