Evaluation of hygrothermal performance of wood-derived biocomposite with biochar in response to climate change

Jisoo Jeon, Ji Hun Park, Hyeonseong Yuk, Young Uk Kim, Beom Yeol Yun, Seunghwan Wi, Sumin Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Wood is a sustainable resource and building material. It provides an excellent response to climate change and has excellent insulation performance. However, structural defects may occur due to decay from moisture, resulting in poor dimensional stability. The rich organic substances contained in wood can lead to mold when the moisture content is consistently high, adversely affecting the health of occupants. Therefore, we attempted to compensate for the disadvantages of wood in regard to water stability while maintaining the high thermal insulation performance and carbon dioxide storage capacity, using biochar from thermally decomposed spruce under oxygen limiting conditions. A wood-derived biocomposite was prepared by mixing biochar and soft wood-based chips using the hot-press method, and the thermal conductivity, specific heat, water vapor resistance factor, moisture adsorption, and moisture desorption performances were analyzed. The thermal conductivity of WB10 with 10 wt% biochar content was 0.09301 W/mK. This is a 7.98% decrease from 0.10108 W/mK, the thermal conductivity of WB0 without biochar. The water vapor resistance factor tended to increase when the biochar ratio increased. As the proportion of biochar increased, the equilibrium moisture content in high relative humidity tended to decrease, and it was found that the moisture adsorption and desorption performances were affected by the ratio of the biochar. Therefore, wood-derived biocomposites using biochar can be used in environmentally friendly materials, with improved thermal insulation performance and water stability.

Original languageEnglish
Article number110359
JournalEnvironmental Research
Volume193
DOIs
Publication statusPublished - 2021 Feb

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea( NRF ) grant funded by the Korea government( MSIT ) (No. 2019R1A2C4100284 ).

Publisher Copyright:
© 2020 Elsevier Inc.

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Environmental Science(all)

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