Use of biochar co-mediated chitosan mesopores to encapsulate alkane and improve thermal properties

Dimberu G. Atinafu, Sungwoong Yang, Beom Yeol Yun, Yujin Kang, Sumin Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Phase-change materials (PCMs) plays a significant role in energy conservation and thermal management systems. However, excessive seepage and insufficient thermal conductivity of pristine PCMs are restricting its real-world applications. Herein, “anisotropic-like” biochar with favorable pore characteristics is designed by combining it with chitosan for dodecane encapsulation. The use of biochar could overcome high manufacturing costs and associated environmental issues of PCM supporting materials. Biochar co-mediated chitosan enrich the mesopore proportion (96.5%) and provide interactive synergistic architecture. The prepared composite PCM exhibited outstanding latent heat retention of 95.9% after repeated cycling, high loading ratio, enhanced thermal conductivity (0.373 W/(m·K)), leakage-free, and repeatable utilization properties above the melting point of pristine dodecane. A figure of merit of 33.94 × 106 W2 S/(m4oC) was achieved, far surpassing that measure among reported biochar-based composite PCMs. This study provides insights into next-generation sustainable energy storage development for a key global sustainability goal.

Original languageEnglish
Article number113539
JournalEnvironmental Research
Volume212
DOIs
Publication statusPublished - 2022 Sep

Bibliographical note

Funding Information:
This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) ( 20202020800030 ). Dr. Dimberu G. Atinafu was supported (in part) by the Yonsei University Research Fund (Yonsei Frontier Lab. Young Researcher Supporting Program) of 2021.

Publisher Copyright:
© 2022 Elsevier Inc.

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Environmental Science(all)

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