A Formaldehyde-Free Soy-Based Adhesive for Making Oriented Strandboard |
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Authors: | Matthew Schwarzkopf Jian Huang |
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Affiliation: | Department of Wood Science and Engineering , Oregon State University , Corvallis, Oregon, USA |
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Abstract: | A formaldehyde-free adhesive consisting of soy flour, polyethylenimine, maleic anhydride, and sodium hydroxide was investigated for making randomly oriented strandboard (R-OSB) and oriented strandboard (OSB). The hot-press conditions and the adhesive usage rate were optimized in terms of enhancing internal bond strength (IB), modulus of rupture (MOR), and modulus of elasticity (MOE) of the resulting R-OSB and OSB. The IB, MOR, and MOE were the highest at a hot-press temperature of 170°C, a hot-press time of 4–5 min, and an adhesive usage rate of 7%. The strengths of the OSB panels made with this formaldehyde-free adhesive were compared with those of commercial OSB panels purchased at a local Home Depot store. |
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Keywords: | Internal bond Oriented strandboard Soy flour Wood adhesive |
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