There is a lot of research about possibilities of use waste agricultural raw materials for boards production. In the face of lack of wood particles on the market as well as overproduction of annual crops straw it is one of the possibilities of straw utilizations.
The aim of this study was to evaluate mould resistance of boards with outer layer made from straw. Three layer particleboards were manufactured from rape straw (Brassica napus L. var. napus), corn straw (Zea mays L.), reed straw (Phragmites vulgaris), triticale straw (Triticosecale Witt b m.) and rye straw (Secale L.) and the core layer was made from industrial wood particle (Pinus sylvestris L.). Straw and wood particles were glued with pMDI with resin level of 4%. Straw-wood particle-adhesives mass was used to form a boards with a nominal thickness (t) 15 mm and a density of 620 kg/m3.
The test was conducted according to BS 3900-G6, during the evaluation the samples shown different resistance to fungal spores suspension as Aspergillus niger. Compering to control samples, made from industrial wood particles, boards with outer layer made from straw had lower resistance to microfungi. The surface of control samples were covered in 95% by spores after 4 weeks of evaluation. The best resistance was noticed for boards made from reed straw. The difference in resistant may result in chemical composition. Straws have less cellulose and more hemicellulose than wood.
Keywords: straw, particleboards, microfungi, BS 3900-G6
Authors
Banaszak A.
Poznan University of Life Sciences, Faculty of Wood Technology, Department of Wood Based Materials
Mirski R.
Poznan University of Life Sciences, Faculty of Wood Technology, Department of Wood Based Materials
Kwaśniewska-Sip P.
Poznan University of Life Sciences, Faculty of Wood Technology, Institute of Chemical Wood Technology
Cofta G.
Poznan University of Life Sciences, Faculty of Wood Technology, Institute of Chemical Wood Technology
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