Skip to main content
U.S. flag

An official website of the United States government

Decay resistance of wood-plastic composites reinforced with extracted or delignified wood flour

Author(s):

Yao Chen
Yongming Fan
Jianmin Gao

Year:

2014

Publication type:

Full Proceedings

Primary Station(s):

Forest Products Laboratory

Source:

IRG/WP 14-40655, THE INTERNATIONAL RESEARCH GROUP ON WOOD PROTECTION Section 4, Processes and properties, Paper prepared for the 45th IRG Annual Meeting St George, Utah, USA, 11-15 May, 2014 pp. 2-9.

Description

The moisture and decay resistance of wood-plastic composites (WPCs) reinforced with extracted or delignified wood flour (WF) was investigated. Three different extractions were preformed: toluene/ethanol (TE), acetone/water (AW), and hot water (HW). Delignification (DL) was performed using a sodium chlorite/acetic acid solution. All WPCs specimens were made with 50% by weight HDPE and WF, first compounded using extrusion followed by injection molding. After preconditioning in water at 70 °C for 5 days, the specimens were exposed for 12 weeks to the brown-rot fungus, Gloeophyllum trabeum in the AWPA D1413 standard soil block test. The WPC made with untreated wood flour had the highest overall weight loss (24.9 ±3.6%), followed by the HW (22.3 ±4.6%) and DL (16.4 ±3%). The TE (7.8 ±0.8%) and AW (7.7 ±2.3%) had the lowest weight losses. WPC moisture content was monitored before and after decay. Cracking was observed in some blends after the preconditioning, which may explain the differences in weight loss.

Citation

Ibach, Rebecca E.; Chen, Yao; Stark, Nicole M.; Tshabalala, Mandla A.; Fan, Yongming; Gao, Jianmin. 2014. Decay resistance of wood-plastic composites reinforced with extracted or delignified wood flour. IRG/WP 14-40655, THE INTERNATIONAL RESEARCH GROUP ON WOOD PROTECTION Section 4, Processes and properties, Paper prepared for the 45th IRG Annual Meeting St George, Utah, USA, 11-15 May, 2014 pp. 2-9.

Publication Notes

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/46173