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Polymers 2017, 9(6), 232;

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

MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650227, China
College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
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)
PDF [3392 KB, uploaded 19 June 2017]


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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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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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