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Title: Chromatographic Analysis of the Reaction of Soy Flour with Formaldehyde adn Phenol for Wood Adhesives

Source: J Amer Oil Chem Soc (2007) 84:769-776; 2007

Author(s)Lorenz, Frihart, Wescott

Publication Year: 2007  View PDF »

Category: Journal Articles

Abstract: The desire to make more biobased and lower-cost bonded wood products has led to an interest in replacing some phenol and formaldehyde in wood adhesives with soybean flour. Improved knowledge of the soy protein properties is needed to relate resin chemistry to resin performance before and after wood bonding. To expose the soy protein's functional groups, it needs to be disrupted, with minimal hydrolysis, to maximize its incorporation into the final polymerized adhesive lattice. The best conditions for alkali soy protein disruption were to maintain the temperature below 100 C and react the soy flour with sodium hydroxide at pH 9-12 for about 1 hour. A gel permeation chromatography procedure was optimized to determine conditions for selectively breaking down the high molecular weight soy protein fragments that contribute to high adhesive viscosity. This method and extraction data were used to evaluate the reaction of the disrupted soy flour protein with formaldehyde and phenol to provide a stable adhesive. The results were used to develop more economical adhesives that are ideally suited for the face section of oriented strandboard.

Keywords: GPC, HPLC, phenol-formaldehyde, soy flour, wood adhesive, particleboard, viscosity, gel permeation chromatography, sodium hydroxide, hydrolysis, adhesives, soybean glue, formaldehyde, phenolic resins, high performance liquid chromatography, GPC, HPLC, oriented strandboard, OSB, phenolic resin glue, bonding

File size: 232 kb(s)

Date posted: 04/27/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 27937
Current FPL Scientist associated with this product
Frihart, Charles R.
Research Chemist
  

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