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European Journal of Wood and Wood Products

, Volume 76, Issue 6, pp 1697–1705 | Cite as

Enhanced bonding strength of heat-treated wood using a cold atmospheric-pressure nitrogen plasma jet

  • Thi Hai Van Nguyen
  • Tat Thang Nguyen
  • Xiaodi Ji
  • Van Dinh Nguyen
  • Minghui Guo
Original
  • 82 Downloads

Abstract

In this work, the bonding strength enhancement of heat-treated wood using a cold atmospheric-pressure nitrogen plasma jet for several lengths of treatment time was investigated. The enhancement of bonding strength was assessed by measurement of the contact angle of aqueous adhesive and water borne finish along with determination of compressive shear strength of wood samples bonded with an aqueous adhesive and pull-off strength of a water borne finish coating on wood samples. Additionally, the elemental composition and crystallinity index of the heat-treated wood surface were characterized using X-ray photoelectron spectroscopy and X-ray diffraction. As expected, the measurements demonstrated that contact angle decreased after atmospheric-pressure nitrogen plasma jet treatment, and the optimal treatment time was 100 s. X-ray photoelectron spectroscopy shows that hydrophilic groups such as C=O, OH, and COOH appeared on the surface of the HW. The atmospheric-pressure nitrogen plasma jet treatment had a positive effect on the crystallinity of heat-treated wood because of a slight degradation of hemicelluloses. Increasing the bonding strength of heat-treated wood is beneficial for broadening the fields of its applications.

Notes

Acknowledgements

This work is financially supported by National Project Upgrading Project of Applied Technology Research and Development Program of Heilongjiang Province (GX16A002).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Bio-based Material Science and Technology of Ministry of EducationNortheast Forestry UniversityHarbinPeople’s Republic of China
  2. 2.Vietnam National University of ForestryHanoiVietnam
  3. 3.Vietnam Academy of Forest SciencesHa NoiVietnam

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