蛋白質－酚醛膠合劑之合成及其在木質複合板製造上之應用（I）三種類型蛋白質－酚醛膠合劑之合成與其膠合性能

Abstract

Wood adhesives in the past decades have largely depended upon petroleum-based chemicals. Uncertainty of the world crude oil supplies has prompt the wood industry to develop adhesives from renewable resources in order to reduce the dependency on petrochemicals. In the present study, various protein-based resins were formulated and evaluated as wood adhesives. These adhesives were formulated by cross-linking hydrolyzates of soybean flour, feather meal, or animal red blood cell with different amounts of phenol-formaldehyde (PF) resin, pine bark tannin, or industrial lignin. These protein-based adhesives were evaluated by a compression shear block method to determine their adhesive bond quality, and some the resins also were evaluated as plywood adhesives. Results indicated that the adhesive bond quality increased with increasing amount of PF (15 w% to 50 w%) in the resin and that addition of tannin (5 w% to 25 w%) and lignin (5 w% to 8 w%) in the resin drastically reduced adhesive bond quality. Resins formulated with red blood cell hydrolyzate were far better than those containing soy flour and feather meal hydrolyzates, and resins formulated with soy flour and feather proteins provided about the same adhesive bond quality. Results of plywood tests indicated that soybean-based resins containing 30 w% to 50 w% PF and 25 w% PF plus 12.5 w% tannin and 12.5 w% lignin met the CNS 1349 standard. Results of present study clearly indicate potential of renewable proteinacious materials, especially animal red blood cell, soybean flour, feather meal, for production of wood adhesives.