Duan Qinchen, Zhang Xin, Lang Shuang, Liu Guowei, Wang Hui, Zhou Xiaojian, Du Guanben
Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Yunnan Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China.
Polymers (Basel). 2023 Mar 30;15(7):1727. doi: 10.3390/polym15071727.
Energy storage materials to modulate indoor microclimates are needed to improve energy efficiency and for human comfort. Of these, phase-change material (PCM) is considered a very useful material because of its excellent latent heat energy storage. For application, some synthetic porous materials for supporting PCM are usually not friendly enough for people and housing environments due to their non-degradation characteristics. Hence, to develop an eco-friendly porous material is needed in order to encapsulate PCM composites that are always expected in indoor applications. In this work, heat-treated bamboo bricks were delignified to provide a delignified bamboo (DB) matrix. A phase-change composite was then fabricated by impregnating DB with polyethylene glycol (PEG) polymer. Impregnation was carried out under wet conditions to ensure the regular arrangement of the DB structure so as to achieve dimensional stability. The final DB/PEG composite was investigated for dimensional stability, load rate, latent heat, and phase-change temperature. Results showed that the DB matrix could be easily impregnated with PEG polymer under wet conditions, and the DB/PEG composite was found to have high enthalpy and a large phase-change temperature interval. Moreover, the composite was found to be a good regulator of indoor temperature and a stable dimension with a snow-white appearance. In summary, this DB/PEG composite is an energy storage material with the potential to modulate ambient indoor temperature and reduce building energy consumption.
为了提高能源效率并提升人类舒适度，需要能调节室内微气候的储能材料。其中，相变材料（PCM）因其出色的潜热储能能力而被认为是一种非常有用的材料。在实际应用中，一些用于支撑PCM的合成多孔材料由于其不可降解的特性，对人和居住环境往往不够友好。因此，为了封装室内应用中一直备受期待的PCM复合材料，需要开发一种环保型多孔材料。在这项工作中，对经过热处理的竹砖进行脱木质素处理，以提供脱木质素竹（DB）基体。然后通过用聚乙二醇（PEG）聚合物浸渍DB来制备相变复合材料。浸渍在潮湿条件下进行，以确保DB结构的规则排列，从而实现尺寸稳定性。对最终的DB/PEG复合材料进行了尺寸稳定性、负载率、潜热和相变温度等方面的研究。结果表明，在潮湿条件下，DB基体能够很容易地被PEG聚合物浸渍，并且发现DB/PEG复合材料具有高焓和较大的相变温度区间。此外，该复合材料被发现是一种良好的室内温度调节剂，尺寸稳定，外观呈雪白状。总之，这种DB/PEG复合材料是一种具有调节室内环境温度和降低建筑能耗潜力的储能材料。
