Utilization of partially liquefied bark for production of particleboards

Jiang, Wen (author), Adamopoulos, Stergios (author), Hosseinpourpia, Reza (author), Žigon, Jure (author), Petrič, Marko (author), Šernek, Milan (author), Medved, Sergej (author)

Bark as a sawmilling residue can be used for producing value-added chemicals and materials. This study investigated the use of partially liquefied bark (PLB) for producing particleboard with or without synthetic adhesives. Maritime pine (Pinus pinaster Ait.) bark was partially liquefied in the presence of ethylene glycol and sulfuric acid. Four types of particleboard panels were prepared with a PLB content of 4.7 %, 9.1 %, 20 %, and 33.3 %, respectively. Another five types of particleboard panels were manufactured by using similar amounts of PLB and 10 wt.% of melamine-urea-formaldehyde (MUF) adhesives. Characterization of bark and solid residues of PLB was performed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and automated vapor sorption (AVS). Mechanical and physical properties of the particleboard were tested according to the European standards EN 310 for determining modulus of elasticity and bending strength, EN 317 for determining thickness swelling after immersion in water, and EN 319 for determining internal bond strength. The results showed that the increase in PLB content improved the mechanical strength for the non-MUF boards, and the MUF-bonded boards with up to 20 % of PLB met the requirements for interior uses in dry conditions according to EN 312. The non-MUF boards containing 33.3 % of PLB and the MUF-bonded boards showed comparable thickness swelling and water absorption levels compared to the reference board.

• Language: English
• Keywords: bark, bonding, partial liquefaction, MUF adhesives, water vapor sorption, thickness swelling, wood-based panels
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 14 str.
• Numbering: Vol. 10, iss. 15, art. 5253
• PID: 20.500.12556/RUL-134313
• UDC: 630*8
• ISSN on article: 2076-3417
• DOI: 10.3390/app10155253
• COBISS.SI-ID: 24100355
• Publication date in RUL: 05.01.2022

Record is a part of a journal

• Title: Applied sciences
• Shortened title: Appl. sci.
• Publisher: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.08.2020

Secondary language

• Language: Slovenian
• Keywords: skorja, lepljenje, delno utekočinjen les, MUF lepilo, absorpcija vode, debelinski nabrek, leseni ploščni kompoziti

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: Formas
• Project number: 942-2016-2
• Name: Utilization of renewable biomass and waste materials for production of environmental-friendly, bio-based composites