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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Analysis of soy flour/phenol-formaldehyde adhesives for bonding wood

Source: Wood adhesives 2005 : November 2-4, 2005 ... San Diego, California, USA. Madison, WI : Forest Products Society, 2005: ISBN: 1892529459: pages 501-505.

Author(s)Lorenz, Linda; Frihart, Charles R.; Wescott, James M.

Publication Year: 2005  View PDF »

Category: Journal Articles

Abstract: The desire to make more environmentally friendly and lower-cost bonded wood products has led to an interest in replacing some phenol and formaldehyde in wood adhe- sives with soybean flour. It is important to develop tests that relate resin production variables to resin properties before and after wood bonding. The protein needs to be denatured, with minimal hydrolysis, to maximize its incorporation into the final polymerized structure. In this study, the best conditions for denaturing were found to be maintaining the temperature below 100C and reacting the soy flour with sodium hydroxide for about 1 hour. Gel permeation chromatography was optimized to determine conditions for selectively breaking down the high molecular weight protein fragments that contribute to high adhesive viscosity. This method and extraction data were used to evaluate the reaction of the denatured soy flour protein with formaldehyde and phenol. Results were used to develop more environmentally friendly face adhesives for oriented strandboard.

Keywords: Particle board, gel permeation charomatography, sodium hydroxide, viscosity, adhesives, soybean glue, formaldehyde, phenolic resins, soy flour, OSB, oriented strandboard, phenolic resin glue, phenolic adhesives, bonding

File size: 389 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 23701
Current FPL Scientist associated with this product
Frihart, Charles R.
Research Chemist

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