Improvement of Thermal Stability and Flame Retardancy of Beech Wood Fibers Using Steam Explosion and Phosphorylation Reaction

An environmentally friendly approach was studied for improving the fire retardancy of beech wood using a steam explosion process coupled with a phosphorylation reaction. Raw beech, steam-exploded, or bleached wood was subjected to phosphorylation employing etidronic acid (HEDP) and urea, and the res...

Full description

Saved in:
Bibliographic Details
Published inBioresources Vol. 18; no. 4; pp. 7309 - 7319
Main Authors Liangsong Cheng, Tianyi Zhan, Henri Vahabi, Isabelle Ziegler-Devin, Karina Antoun, Zehui Ju, Laurent Chrusciel, Xiaoning Lu, Nicolas Brosse
Format Journal Article
LanguageEnglish
Published North Carolina State University 01.09.2023
Subjects
beech wood
flame-retardancy
phosphorylation
steam explosion
thermal stability
Online AccessGet full text

Cover

More Information
Summary:An environmentally friendly approach was studied for improving the fire retardancy of beech wood using a steam explosion process coupled with a phosphorylation reaction. Raw beech, steam-exploded, or bleached wood was subjected to phosphorylation employing etidronic acid (HEDP) and urea, and the resulting chemical composition and thermal behavior were analyzed using techniques such as elemental analysis, Fourier transform infrared spectroscopy, ionic chromatography, and pyrolysis combustion flow calorimetry. The thermal performance of beech wood underwent significant enhancements after the steam explosion treatment combined with soda impregnation. It resulted in a striking reduction in heat release rates (HRR), especially its peak (pHRR) and time-to-pHRR (TpHRR) values (from 139.5 W/g and 365 °C to 40 W/g and 247 °C) and an increase in residue from 10.5% to 41.3%. The results demonstrate that the process created a self-extinguishing and non-flammable material that exhibited noteworthy flame retardancy improvement.
ISSN:1930-2126