NDLI: The Application of Oak Bark Powder as a Filler for Melamine-Urea-Formaldehyde Adhesive in Plywood Manufacturing

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The Application of Oak Bark Powder as a Filler for Melamine-Urea-Formaldehyde Adhesive in Plywood Manufacturing

Content Provider	MDPI
Author	Mirski, Radosław Kawalerczyk, Jakub Dziurka, Dorota Siuda, Joanna Wieruszewski, Marek
Copyright Year	2020
Description	The woodworking industry generates a great amount of bark which has not yet found a wider industrial application. None of the previously conducted research has considered oak bark application (which is one of the most often processed wood species in Poland) as a filler for wood adhesives. Moreover, no studies have determined the properties of bark containing melamine-urea-formaldehyde resin (MUF), which increasingly replaces pure urea-formaldehyde adhesives. Thus, the aim of the study was to determine the possibility of grinded oak bark application as a filler for MUF adhesive in plywood manufacturing. The chemical composition of oak bark was evaluated. Properties of liquid resins, such as viscosity, gel time, pH, and solid content, were determined. Chemical interaction between the filler and resin was assessed with using Fourier-transform infrared (FTIR) spectroscopy. Plywood panels manufactured using MUF adhesive filled with different bark concentrations (10%, 15%, 20%, 25%) were tested in terms of such properties as formaldehyde release and bonding quality. Studies have shown an improvement in liquid resin properties. The course of FTIR spectra did not explain the chemical interaction between the polymer and the filler. The addition of oak bark at a concentration of 15% made it possible to produce plywood panels characterized by reduced formaldehyde release and improved bonding quality.
Starting Page	1249
e-ISSN	19994907
DOI	10.3390/f11121249
Journal	Forests
Issue Number	12
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2020-11-25
Access Restriction	Open
Subject Keyword	Forests Paper and Wood Oak Bark Filler Plywood Melamine-urea-formaldehyde Adhesive
Content Type	Text
Resource Type	Article

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