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Fabrication of nano-cupric oxide in phenol–formaldehyde resin adhesive: effect of cupric chloride concentration on resin performance

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Abstract

The potential for simultaneously incorporating nano-copper oxide (CuO) while synthesizing phenol–formaldehyde (PF) resin using different concentrations of cupric chloride (CuCl2) was studied. Curing kinetics, resin morphology, as well as physical and mechanical properties of oriented strand boards produced using the modified PF resin were evaluated. Nano-CuO showed a positive effect on the PF resin curing reactions that was characterized by a significant decrease in the activation energy within conversion degree of 65%. X-ray photoelectron spectrometric analysis showed that bivalent CuO was present in the modified PF resin. Laser scattering particle analysis showed that more than 40% of CuO was in the nanoparticle range. Four types of nano-CuO crystal structures were observed. Incorporation of nano-CuO derived from a 40% concentration of CuCl2 into the PF resin gave a 74% increase in perpendicular MOR. 2-h thickness swelling of PCu-0.5 was improved significantly. The findings of this work have potential application to the engineered wood composites manufacturing.

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Acknowledgments

The authors express their gratitude to the National Natural Science Foundation of China (Granted 31660175), for their financial support to this research work, and also appreciate support from the Project of Yunnan Reserve Talents of Young Academic and Technical Leaders (2018HB025), as well as Yunnan Top Young Talents of Ten Thousand Talents Plan.

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Authors and Affiliations

  1. Yunnan Key Laboratory of Wood Adhesives and Glue Products, Southwest Forestry University, Kunming, 650224, Yunnan Province, People’s Republic of China

    Sisi Zhao, Ke Zhan, Quanxiong Lu, Sengwei Xia, Congnan Guo, Wei Gao & Hong Lei

  2. College of Material Science and Engineering, Southwest Forestry University, Kunming, 650224, Yunnan Province, People’s Republic of China

    Sisi Zhao, Ke Zhan, Quanxiong Lu, Sengwei Xia, Congnan Guo, Wei Gao & Hong Lei

  3. National Centre for Timber Durability and Design Life, University of the Sunshine Coast, Brisbane, QLD, Australia

    Tengfei Yi & Jeffrey J. Morrell

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  1. Sisi Zhao
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  2. Ke Zhan
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  3. Quanxiong Lu
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  4. Sengwei Xia
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  5. Congnan Guo
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  7. Jeffrey J. Morrell
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  8. Wei Gao
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  9. Hong Lei
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Correspondence to Wei Gao.

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Zhao, S., Zhan, K., Lu, Q. et al. Fabrication of nano-cupric oxide in phenol–formaldehyde resin adhesive: effect of cupric chloride concentration on resin performance. Wood Sci Technol 54, 1551–1567 (2020). https://doi.org/10.1007/s00226-020-01219-9

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  • DOI: https://doi.org/10.1007/s00226-020-01219-9

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