生物质碳化衍生物强化相变材料各向热导率的研究进展

Review on biomass carbonized derivatives for enhancing anisotropic thermal conductivity of phase change materials

相变材料由于具有较高的潜热值和良好的温度控制性能,已经被广泛应用于建筑节能、余热废热回收、电池热管理、太阳能热能储存等领域。然而,相变材料在固-液相变过程中的泄漏和导热性能差等缺点限制了它们的进一步发展。生物质碳化衍生物具有的多孔微观结构和良好的导热性克服了相变材料相变时的液漏和自身导热能力差等问题,成为相变材料良好的载体选择。由于生物质碳化衍生物多孔碳材料具有各向同性和各向异性的结构,因此,生物质碳化衍生物多孔碳材料强化相变材料的热导率分为各向同性热导率强化和各向异性热导率强化。

Phase change materials are widely used in energy saving buildings,waste heat recovery,battery thermal management,solar thermal energy storage and other fields due to their high latent heat values and good temperature control performance.However,their developments are limited by shortcomings such as leakage and inferior thermal conductivity during solid-liquid phase transformation.The porous microstructure and good thermal conductivity of biomass carbide derivatives can overcome these issues,which are good choices for phase change materials.Because of the isotropic and anisotropic structures of porous carbon materials derived from biomass carbonization,the thermal conductivity enhancement of porous carbon materials derived from biomass carbonization can be divided into isotropic thermal conductivity enhancement and anisotropic thermal conductivity enhancement.