Skip to main navigation Skip to search Skip to main content

Tannin-caprolactam and Tannin-PEG formulations as outdoor wood preservatives: biological properties

  • J. Hu
  • , M.-F. Thevenon
  • , S. Palanti
  • , G. Tondi
  • College of Material Science and Engineering, Central South University of Forestry and Technology
  • Research Unit BioWooEB, CIRAD
  • CNR-IVALSA - Tree and Timber Institute

Research output: Contribution to journalArticlepeer-review

Abstract

Key Message
This article presents the enhancement in boron fixation as well as the improved biological resistance against fungi and termites for wood samples treated with tannin-caprolactam and tannin-PEG formulations.

Context
Although the recently developed tannin-boron wood preservatives have shown high biological protection, they presented also average resistance against weathering. The tannin-caprolactam formulations have shown improved weathering resistances and dimensional stability.

Aims
For this reason, more detailed biological tests were performed to evaluate the influence of the caprolactam and PEG on the biological resistance.

Methods
In this paper, the boron leaching of the tannin-caprolactam and tannin-PEG impregnated Scots pine specimens was observed and the biocidal effect against fungi (Antrodia spp. and Coniophora puteana) and insects (Reticulitermes flavipes and Hylotrupes bajulus) were determined according to the guidelines of EN 113, EN 117, and EN 47.

Results
The advanced formulations containing PEG have shown interesting resistance against fungal decay, but very low penetration and weak resistance against larvae while the tannin-caprolactam preservatives have shown overall improved biological performances and higher boron fixations.

Conclusion
The biocidal activity of the caprolactam-added formulations was overall enhanced and therefore these formulations are confirmed to be an interesting alternative for the wood preservation in outdoor environment. © 2017, The Author(s).
Original languageEnglish
Article number18
JournalAnnals of Forest Science
Volume74
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Boron leaching
  • Caprolactam
  • Condensed tannins
  • Fungal decay
  • Insect resistance
  • bioassay
  • biological weathering
  • boron
  • coniferous tree
  • fungus
  • leaching
  • organic compound
  • pesticide
  • preservative
  • tannin
  • termite
  • testing method
  • wood
  • Antrodia
  • Coniophora puteana
  • Fungi
  • Hexapoda
  • Isoptera
  • Pinus sylvestris
  • Reticulitermes flavipes

Fingerprint

Dive into the research topics of 'Tannin-caprolactam and Tannin-PEG formulations as outdoor wood preservatives: biological properties'. Together they form a unique fingerprint.

Cite this