Performance Evaluation of Modified Canola Flour Adhesive in Plywood Production

Document Type : Research Paper

Authors

1 Ph.D. student, Department of wood and paper science and technology, Faculty of natural resources and marine sciences, Tarbiat Modares university, Noor, Iran

2 Associate prof., Department of wood and paper science and technology, Faculty of natural resources and marine sciences, Tarbiat Modares university, Noor, Iran

3 Associate Prof., Department of wood and paper science and technology, University of Zabol, Zabol, Iran

4 Professor, Department of wood and paper science and technology, Faculty of natural resources and marine sciences, Tarbiat Modares university, Noor, Iran

Abstract

The purpose of this study was to evaluate the performance of canola flour adhesive in plywood manufacturing. For this reason, first canola flour was modified with sodium hydroxide and urea/sodium hydroxide, separately. Then to create cross linking between protein molecules, different levels of pMDI (5, 15, and 30%) was added to slurry as based on dry weight of canola flour. The results of this study indicated that the dry shear strength of specimens was significantly increased compared to unmodified adhesive as the alkali and urea was added to canola flour adhesive. Also, more pMDI content in adhesives resulted more improvement this property. In this study, the dry shear strength of all modified canola adhesives was more than the En-314-2 standard. Also, chemical modification of canola adhesives caused improvement the water resistance so that in soaking/drying cycles, the behavior of some adhesives was close or similar to Urea formaldehyde.

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Main Subjects

References

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Iranian Journal of Wood and Paper Industries
Volume 8, Issue 4
March 2018
Pages 631-643

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