Effects of Wollastonite on Selected Properties of Medium-Density Fiberboards Made from Wood and Palm Leaf Residues

Hamid R. Taghiyari; Mahdi Arabi; Petar Antov; Elham Nadali; Dorina C. Ilies; Ehsan Salimifard; Ismaeil Shishegar; Viktor Savov; Viktoria Dudeva; Jakub Kawalerczyk; Mariana Ratiu

Authors

Hamid R. Taghiyari Wood Science & Technology Department, Shahid Rajaee Teacher Training University, Tehran 16788-15811, Iran https://orcid.org/0000-0002-6952-0923
Mahdi Arabi Department of Surveying and GIS Engineering, Shahid Rajaee Teacher Training University (SRTTU), Tehran 16788-15811, Iran
Petar Antov Department of Mechanical Wood Technology, Faculty of Forestry Industry, University of Forestry, 1797 Sofia, Bulgaria https://orcid.org/0000-0002-3837-5380
Elham Nadali Department of Wood & Paper Science and Technology, University of Tehran, Karaj 77871-31587, Iran https://orcid.org/0009-0003-3808-1862
Dorina C. Ilies Department of Geography, Tourism and Territorial Planning, University of Oradea, 1 Universitatii Street, 410087 Oradea, Romania https://orcid.org/0000-0002-1381-7146
Ehsan Salimifard Wood Science & Technology Department, Shahid Rajaee Teacher Training University, Tehran 16788-15811, Iran
Ismaeil Shishegar Intellectual Property Law, Allameh Tabatabaei University, Tehran, Iran https://orcid.org/0009-0003-1725-5480
Viktor Savov Department of Mechanical Wood Technology, Faculty of Forestry Industry, University of Forestry, 1797 Sofia, Bulgaria https://orcid.org/0000-0001-5111-8760
Viktoria Dudeva Department of Mechanical Wood Technology, Faculty of Forestry Industry, University of Forestry, 1797 Sofia, Bulgaria https://orcid.org/0009-0003-0387-8716
Jakub Kawalerczyk Department of Mechanical Wood Technology, Poznań University of Life Sciences, Poznań, Poland https://orcid.org/0000-0002-5539-1841
Mariana Ratiu Department of Mechanical Engineering and Automotive, University of Oradea, 410087 Oradea, Romania https://orcid.org/0000-0002-7629-4995

Keywords:

Wood-based composite, Urea-formaldehyde resin, Isocyanate resin, Minerals, Palm leaf residue, Reinforcing effects, Wollastonite

Abstract

Effects of adding wollastonite (W, at 5% and 10%) and palm leaf residues(at 10%), based on the dry weight of wood fibers, were evaluated relative to selected properties of medium-density fiberboards (MDF), bonded with two adhesive systems, i.e., urea-formaldehyde (UF, at 10%) and isocyanate (IC, at 5%) resins. The results indicated a general improvement in screw withdrawal resistance in the UF-bonded panels due to the addition of wollastonite. This enhancement is attributed to the reinforcing effect of wollastonite. In the IC-bonded panels, the addition of wollastonite had an improving effect when W-content was 5%. The addition of defibrated palm leaves generally decreased the screw withdrawal resistance of the MDF panels due to the soft nature of the palm fibers. The fire properties of the IC-bonded panels tended to be more favorable or at least comparable to those of the UF-bonded panels, which was attributed to the formation of bubbles in the cured resin. The addition of wollastonite generally improved fire properties in both resins. It was concluded that wollastonite and defibrated palm leaves can be recommended for MDF production when the contents of wollastonite and palm leaves do not exceed 5% and 10%, respectively.

Effects of Wollastonite on Selected Properties of Medium-Density Fiberboards Made from Wood and Palm Leaf Residues

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