Montanari Céline, Chen Hui, Lidfeldt Matilda, Gunnarsson Josefin, Olsén Peter, Berglund Lars A
Department of Fibre and Polymer Technology, Wallenberg Wood Science Center, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 100 44, Sweden.
IVL Swedish Environmental Research Institute, Gothenburg, 400 14, Sweden.
Small. 2023 Jul;19(28):e2301262. doi: 10.1002/smll.202301262. Epub 2023 Mar 27.
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 ) 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.
功能节能建筑材料的可持续发展对于降低热能消耗和促进室内自然采光至关重要。嵌入木质材料中的相变材料是热能存储的候选材料。然而，其可再生资源含量通常不足，储能和机械性能较差，且可持续性方面尚未得到探索。在此，介绍了一种新型的全生物基透明木材（TW）生物复合材料，用于热能存储，它兼具优异的蓄热性能、可调的光学透过率和机械性能。一种基于合成柠檬烯丙烯酸酯单体和可再生1-十二醇的生物基基质被浸渍并在中孔木材基材中原位聚合。TW表现出高潜热（89焦耳/克），超过了商用石膏板，同时具有热响应光学透过率（高达86%）和高达86兆帕的机械强度。生命周期评估表明，生物基TW的环境影响比透明聚碳酸酯板低39%。这种生物基TW作为可扩展的可持续透明蓄热解决方案具有巨大潜力。
