Effects of sawdust and adhesive type on the properties of rice husk particleboards
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
Results in Engineering
Abstract
This study set out to investigate the effects of adhesive type, rice husk and sawdust proportions on the properties
of composite particleboards. Specimens of 200 × 200 × 24 mm were made by blending 500 g of rice husks with
each adhesive type at a mass ratio of 1:1. The rest of the specimens of similar dimensions were prepared with
addition of sawdust in the range of 10–40 wt%, while maintaining the ratio of biomass particles to adhesive at
1:1. Three commercial synthetic adhesives Fevicol (FV), Ponal (PA) and woodfix (WF) were used. The particleadhesive
mixtures were molded into a mat which was subsequently cold pressed at 10 MPa and left to dry in air.
Density, water absorption (WA), linear expansion (LE), thickness swelling (TS), modulus of elasticity (MOE),
modulus of rupture (MOR) and screw holding capacity of the specimens were evaluated. Adhesives were found to
have over 42% solid content, with similar liquid constituents but in varying proportions. FTIR library search for
the spectra of FV, PA and WF revealed correlations of 82.5%, 78.6% and 50.2%, respectively with polyvinylacetate.
The developed boards had density 510–610 kg/m3, MOE 13–26 MPa, TS 9–31%, LE 3–7%. These
properties suit them for furniture boards and sound proofing. The properties improved with increasing proportion
of sawdust. FV and PA-bonded particleboards exhibited higher stability and strengths than WF-bonded
particleboards due to higher concentrations of polyvinyl-acetate in the latter. Blending 40 wt% sawdust, 10 wt%
rice husk with 50 wt% of either FV or PA showed better prospects.
Description
Keywords
Adhesives, Particleboards, Properties, Rice husks, Sawdust
Citation
Olupot, P. W., Menya, E., Lubwama, F., Ssekaluvu, L., Nabuuma, B., & Wakatuntu, J. (2022). Effects of sawdust and adhesive type on the properties of rice husk particleboards. Results in Engineering, 16, 100775. https://doi.org/10.1016/j.rineng.2022.100775