Preparation and Performance Investigation of Bamboo Sheath-Based Composite Phase Change Materials
Phase change materials,as a class of functional materials with high energy density and long-term heat storage characteristics,are gradually becoming a research focus in addressing key issues in energy storage and utilization.The problem of leakage in their liquid phase state is of significant importance for the industrial development of phase change materials.Considering the abundance of resources,sustainabili-ty,and potential cost advantages,this study selected bamboo culm sheath(bamboo sheath),a byproduct from bamboo shoot processing,as the carrier for encapsulating phase change materials.Utilizing the vacuum impregnation method,a bamboo sheath-based composite phase change material was constructed.Through in-depth analysis of its performance,the study revealed its heat storage characteristics and poten-tial application value.The results indicated that the continuous natural porous network structure of bamboo sheath was conducive to the encapsulation of polyethylene glycol(PEG),achieving an encapsula-tion efficiency of 42.1%.The physical interactions between bamboo sheath and PEG did not compromise the phase change properties of PEG.The composite material exhibited not only a melting latent heat of 54.3 J/g,but also a solidification latent heat of 54.5 J/g.The porous structure of bamboo sheath also im-proved the supercooling phenomenon of PEG.Furthermore,the prepared bamboo sheath-based composite phase change material demonstrated outstanding temperature regulation,leak prevention,thermal stability,and repeatability,showcasing its potential applications in advanced energy-related devices and building energy conservation.
bamboo sheathphase change materialheat storagecomposite material
万方数据
维普
