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Phytic acid–decorated κ-carrageenan/melanin hybrid aerogels supported phase change composites with excellent photothermal conversion efficiency and flame retardancy

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  • Jin, Linzhao
  • Tan, Yunlong
  • Yuan, Shunpan
  • Wang, Shuang
  • Cheng, Xu
  • Wang, Haibo
  • Du, Zongliang
  • Du, Xiaosheng

Abstract

Organic phase change materials (PCMs) have been widely applied to thermal energy storage systems; however, poor solar–thermal conversion performance, high flammability, and liquid leakage issues considerably limit their practical application in efficient solar energy utilization. Herein, phytic acid–decorated melanin/κ-carrageenan aerogels (PMCAs) with excellent solar–thermal effect and satisfactory flame retardancy were developed using the cationic induction method. Then, form-stable PCM composites (PMPCMs) were fabricated by integrating molten n-octacosane into PMCAs through vacuum impregnation. The PMCAs effectively supported n-octacosane and avoided liquid leakage during the solar–thermal storage process owing to their strong surface tension and capillary force. The PMPCMs exhibited considerably high encapsulated efficiency (up to 97.73%), satisfactory thermal storage ability (246.7–257.7 J/g), and excellent thermal reliability. The introduction of natural melanin (natural photothermal conversion compound) and phytic acid (bio-based phosphorus-rich compound) significantly enhanced the solar–thermal conversion efficiency (from 61.7% to 89.4%) and flame retardancy of the PMPCMs. Thus, the synthesized form-stable composites possess tremendous potential for solar energy utilization.

Suggested Citation

  • Jin, Linzhao & Tan, Yunlong & Yuan, Shunpan & Wang, Shuang & Cheng, Xu & Wang, Haibo & Du, Zongliang & Du, Xiaosheng, 2023. "Phytic acid–decorated κ-carrageenan/melanin hybrid aerogels supported phase change composites with excellent photothermal conversion efficiency and flame retardancy," Renewable Energy, Elsevier, vol. 206(C), pages 148-156.
    • Handle: RePEc:eee:renene:v:206:y:2023:i:c:p:148-156
    DOI: 10.1016/j.renene.2023.02.030
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    References listed on IDEAS

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    1. Yuan, Shunpan & Yan, Rui & Ren, Bibo & Du, Zongliang & Cheng, Xu & Du, Xiaosheng & Wang, Haibo, 2021. "Robust, double-layered phase-changing microcapsules with superior solar-thermal conversion capability and extremely high energy storage density for efficient solar energy storage," Renewable Energy, Elsevier, vol. 180(C), pages 725-733.
    2. Li, Dacheng & Wang, Jihong & Ding, Yulong & Yao, Hua & Huang, Yun, 2019. "Dynamic thermal management for industrial waste heat recovery based on phase change material thermal storage," Applied Energy, Elsevier, vol. 236(C), pages 1168-1182.
    3. Wang, Linqiang & Liang, Weidong & Wang, Chengjun & Fan, Yukang & Liu, Yi & Xiao, Chaohu & Sun, Hanxue & Zhu, Zhaoqi & Li, An, 2021. "Dodecylamine/Ti3C2-pectin form-stable phase change composites with enhanced light-to-thermal conversion and mechanical properties," Renewable Energy, Elsevier, vol. 176(C), pages 663-674.
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