iForest - Biogeosciences and Forestry


Dielectric properties of paraffin wax emulsion/copper azole compound system treated wood

Yuqing Liao (1), Erni Ma (1), Ru Liu (2)   

iForest - Biogeosciences and Forestry, Volume 12, Issue 2, Pages 199-206 (2019)
doi: https://doi.org/10.3832/ifor2879-012
Published: Apr 10, 2019 - Copyright © 2019 SISEF

Research Articles

In order to investigate the interactions among the waterproof agent, preservative and wood, the dielectric relaxation was measured for untreated wood and wood samples treated with different paraffin wax emulsion/copper azole (CA) compound systems at oven-dried and air-dried state, respectively. The Cole-Cole plot analysis was then conducted and the results were as follow. At oven-dried state (-60 °C), the dielectric characteristics of paraffin wax emulsion treated wood were basically the same as those of untreated wood; CA treatment increased the dielectric constant but decreased the dielectric loss factor and the trends of these two characteristic parameters were more remarkable at higher CA concentration; the dielectric properties of compound system treated wood under C4A grade were similar to those of CA treated wood but an increase in impregnation of paraffin wax emulsion gave rise to decreased dielectric constant and increased loss factor. At air-dried state (20 °C, 65% RH), compared with untreated samples, both the dielectric constant and loss factor were lower in waterproofing agent treated wood and these parameters reduced with increasing waterproofing agent concentration; for CA treated samples, the values of dielectric parameters increased and the trend was similar to those treated with the compound system under C4A grade.


Wood, Paraffin Wax Emulsion, Copper Azole, Dielectric Properties

Authors’ address

Yuqing Liao
Erni Ma 0000-0001-9774-9779
MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Qinghua East Road 35, Haidian 100083, Beijing (China)
Ru Liu
Research Institute of Wood Industry, Chinese Academy of Forestry, Haidian 100091, Beijing (China)

Corresponding author



Liao Y, Ma E, Liu R (2019). Dielectric properties of paraffin wax emulsion/copper azole compound system treated wood. iForest 12: 199-206. - doi: 10.3832/ifor2879-012

Academic Editor

Giacomo Goli

Paper history

Received: Jun 03, 2018
Accepted: Jan 23, 2019

First online: Apr 10, 2019
Publication Date: Apr 30, 2019
Publication Time: 2.57 months

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