2023-03-30 スウェーデン王立工科大学（KTH)
この材料は、太陽光以外の熱源でもバッテリーを充電でき、温度変化が24℃の周りで起こることで熱や冷気を蓄えることができます。このコンポジットは、内外の建築材料に使用でき、将来的には温室用材料にも使用される可能性があります。しかし、外部使用にはさらなる研究が必要です。
＜関連情報＞
- https://www.kth.se/en/om/nyheter/centrala-nyheter/coconuts-and-lemons-enable-a-thermal-wood-for-indoor-heating-and-cooling-1.1243788
- https://onlinelibrary.wiley.com/doi/full/10.1002/smll.202301262
完全バイオマス原料の透明木材を用いた持続可能な熱エネルギー電池 Sustainable Thermal Energy Batteries from Fully Bio-Based Transparent Wood
Céline Montanari, Hui Chen, Matilda Lidfeldt, Josefin Gunnarsson, Peter Olsén, Lars A. Berglund
Small Published: 27 March 2023
DOI:https://doi.org/10.1002/smll.202301262
Abstract
The sustainable development of functional energy-saving building materials is important for reducing thermal energy consumption and promoting natural indoor lighting. Phase-change materials embedded in wood-based materials are candidates for thermal energy storage. However, the renewable resource content is usually insufficient, the energy storage and mechanical properties are poor, and the sustainability aspect is unexplored. Here a novel fully bio-based transparent wood (TW) biocomposite for thermal energy storage, combining excellent heat storage properties, tunable optical transmittance, and mechanical performance is introduced. A bio-based matrix based on a synthesized limonene acrylate monomer and renewable 1-dodecanol is impregnated and in situ polymerized within mesoporous wood substrates. The TW demonstrates high latent heat (89 J g−1) exceeding commercial gypsum panels, combined with thermo-responsive optical transmittance (up to 86%) and mechanical strength up to 86 MPa. The life cycle assessment shows that the bio-based TW has a 39% lower environmental impact than transparent polycarbonate panels. The bio-based TW holds great potential as scalable and sustainable transparent heat storage solution.
