Preparation and properties of reed straw biomass based composite phase change materials
JIN Chao
CHEN Shaoyou
LIU Tie
ZHOU Wei
SUN Zhiwei
WEN Xiaodong
LI Chaoen
Abstract：Using reed straw as raw material,porous biochar matrix was prepared via high-temperature carbonization,and vacu-um melt impregnation combined with expanded graphite(EG)modification was employed to fabricate the composite.Experimental results show that the optimal PCM content is 65%by mass,achieving minimal leakage.The composite exhibits an enthalpy of 169.1 J/g and a thermal conductivity of 1.14 W/(m·K),representing a 612.5%improvement compared to pure PCM.No chemical reactions exist between components,indicating excellent compatibility.Thermal cycling tests demonstrate a 28%reduction in super-cooling and enhanced thermal stability.Practical application tests show that the melting and setting time of this material is short-ened by 62%and 61%respectively compared to pure PCM.The prepared composite PCM has low cost and high performance,showing promising potential in building energy efficiency,solar thermal storage,and other fields.
Keywords：phase change materialsbiocharreed strawphase change energy storage
Publication Date：2025-11-25
Online Publishing Date：2025-12-15(First online date of this platform, not the publication date of the document)
Pages：6( 1-6 )