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Wood Science and Technology

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17-06-2019 | Original

Fabrication of nano-cupric oxide in phenol–formaldehyde resin adhesive: synthesis, curing characteristics, and morphology

Authors: Sisi Zhao, Wei Gao, Tengfei Yi, Congnan Guo, Ke Zhan, Guanben Du

Published in: Wood Science and Technology | Issue 4/2019

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Abstract

To explore the possibilities of reducing the costs of nano-copper oxide (CuO)-modified phenol–formaldehyde (PF) resin, PF resin synthesis and nano-CuO preparation utilizing different copper salts were carried out simultaneously in one system. The curing kinetics, morphology, as well as physical and mechanical properties of modified PF resins-bonded oriented strand boards (OSB) were evaluated. Nano-CuO showed a positive effect on the curing reaction of the PF resin, characterized by a significant decrease in the activation energy of the reaction. X-ray diffraction and transmission electron microscopy tests showed that the derived nano-CuO was in nano- and microscale. Four different types of crystal structure of the nano-CuO, varied according to their copper salts, were observed in scanning electron microscopy images. The water resistance and bonding strength of glued OSB prepared with these resin samples indicated that the influence of nano-CuO on the mechanical properties of the boards was positive. This system has the potential to be applied to the engineered wood-based composites manufacturing.

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Title: Fabrication of nano-cupric oxide in phenol–formaldehyde resin adhesive: synthesis, curing characteristics, and morphology
Authors: Sisi Zhao
Wei Gao
Tengfei Yi
Congnan Guo
Ke Zhan
Guanben Du
Publication date: 17-06-2019
Publisher: Springer Berlin Heidelberg
Published in: Wood Science and Technology / Issue 4/2019
Print ISSN: 0043-7719
Electronic ISSN: 1432-5225
DOI: https://doi.org/10.1007/s00226-019-01106-y

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