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Polymers 2017, 9(6), 232; doi:10.3390/polym9060232

The Preparation and Characterization of Pyrolysis Bio-Oil-Resorcinol-Aldehyde Resin Cold-Set Adhesives for Wood Construction

1
MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China
2
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650227, China
3
College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
4
Wood Material Science and Engineering Key Laboratory of Jilin Province, Beihua University, Jilin 132013, China
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 28 April 2017 / Revised: 14 June 2017 / Accepted: 15 June 2017 / Published: 18 June 2017
(This article belongs to the Collection Polymeric Adhesives)
View Full-Text   |   Download PDF [3392 KB, uploaded 19 June 2017]   |  

Abstract

Resorcinol-formaldehyde (RF) resin is a kind of excellent exterior-grade wood structural adhesive, which can be conveniently cold-set for various applications. In order to decrease the production cost, pyrolysis bio-oil from renewable bioresources was used to replace resorcinol to synthesize the bio-oil-resorcinol-aldehyde (BRF) resin. The effect of replacing resorcinol with bio-oil on the properties, bonding performance, and characterization of resorcinol-aldehyde resin was comparatively investigated. A higher solid content and viscosity, albeit a lower shear strength, was found when the replacement ratio of bio-oil increased. The bonding performance of BRF with 10 and 20 wt % bio-oil was close to that of the pure RF resin. However, the trends of being less cross-linked, more easily decomposed, but more porous were found when the substitution ratio of bio-oil was higher than 20 wt %. Interestingly, it was found that the wood failure values of the BRF resins with bio-oil of no more than 20 wt % were slightly higher than that of the pure RF resin. On the whole, BRF resins with 20 wt % bio-oil is recommended as a wood structural adhesive, comprehensively considering the bio-oil substitution ratio and resin properties. The results obtained here showed that pyrolysis bio-oil is a promising green raw material for the production of RF resin with lower cost. View Full-Text
Keywords: biomass pyrolysis bio-oil; resorcinol-aldehyde resin; cold-set adhesive; wood construction biomass pyrolysis bio-oil; resorcinol-aldehyde resin; cold-set adhesive; wood construction
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Ren, X.; Cai, H.; Du, H.; Chang, J. The Preparation and Characterization of Pyrolysis Bio-Oil-Resorcinol-Aldehyde Resin Cold-Set Adhesives for Wood Construction. Polymers 2017, 9, 232.

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