Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

In Search of the Optimal Measurement Parameters for Determining the Degree of Modification of Thermally Modified Wood by Thermogravimetry

Romana Cerc Korošec
* ORCID logo ,
Boštjan Žener
,
Nataša Čelan Korošin
ORCID logo ,
Miha Humar
ORCID logo ,
Davor Kržišnik
ORCID logo ,
Gregor Rep
,
Urška Lavrenčič Štangar
ORCID logo
Version 1 : Received: 31 October 2023 / Approved: 1 November 2023 / Online: 1 November 2023 (11:07:19 CET)

A peer-reviewed article of this Preprint also exists.

Cerc Korošec, R.; Žener, B.; Čelan Korošin, N.; Humar, M.; Kržišnik, D.; Rep, G.; Lavrenčič Štangar, U. Searching for Optimal Measurement Parameters by Thermogravimetry for Determining the Degree of Modification of Thermally Modified Wood. Forests 2024, 15, 8. Cerc Korošec, R.; Žener, B.; Čelan Korošin, N.; Humar, M.; Kržišnik, D.; Rep, G.; Lavrenčič Štangar, U. Searching for Optimal Measurement Parameters by Thermogravimetry for Determining the Degree of Modification of Thermally Modified Wood. Forests 2024, 15, 8.

Abstract

When wood is thermally modified, several chemical reactions take place that change the chemical and physical properties of the wood. These changes correlate with the degree of modification, which is mostly a function of temperature and duration of modification, and consequently with a mass loss during this process. There is a lack of standardized quality control to verify the degree of heat treatment of wood and thus its quality. One of the possible methods to check the degree of thermal modification of a particular type of wood is thermogravimetry (TG). It is based on the assumption that processes that did not take place during thermal modification continue when the TG experiment is carried out. In this method, calibration curves have to be established based on TG measurements of standard samples that have been thermally modified at different temperatures and whose mass loss during modification is known. The calibration curves show the mass loss during the TG measurement as a function of the mass loss during the previous thermal modification. The course of thermal decomposition during the TG measurements is influenced by many parameters, such as the mass of the sample, the heating rate, the atmosphere in which the measurement takes place, and the shape of the crucible in which the sample is placed. In this paper, the influence of these parameters on the calibration curves was investigated. We have focused on oak wood. The best parameters result in a calibration curve with the largest correlation coefficient R2 and the highest slope of the line k. On this basis, we can determine the mass loss during thermal modification of unknown samples of the same wood species under the same measurement conditions.

Keywords

thermal treatment; wood modification; thermogravimetry; calibration curve; quality control

Subject

Chemistry and Materials Science, Paper, Wood and Textiles

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Download PDF

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Metrics 0
Get PDF Cite Share 0
Bookmark BibSonomy Mendeley Reddit Delicious
×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.