以野生雏菊茎秆为原料,通过高温碳化和化学改性得到层次化多孔骨架材料,在多孔骨架材料中真空浸渍石蜡制备了形状稳定的生物基复合相变材料。利用乙醇进行化学改性后,孔隙结构更丰富,复合相变材料的焓值增加。制备的生物基多孔炭复合相变材料相变焓为213.6J/g,相变温度为40.1℃,具有良好的热稳定性、化学稳定性和循环稳定性。将生物基多孔炭复合相变材料集成到模拟建筑中,研究了其热管理性能。结果表明,在模拟光照下,相变房屋具有明显的热缓冲作用,该复合相变材料在热管理方面具有巨大的应用潜力。
Hierarchical porous skeletal materials were obtained by high-temperature carbonization and chemical modification using wild daisy stalks as raw materials,and shape-stabilized bio-based composite phase change materials were prepared by vacuum impregnation of paraffin wax in the porous skeletal materials.The chemical modification using ethanol resulted in a richer pore structure and an increase in the enthalpy of the composite phase change material.The enthalpy of phase transition of the prepared bio-based porous carbon composite phase change material was 213.6J/g,and the phase change temperature was 40.1℃,with good thermal,chemical,and cyclic stability.The bio-based composite phase change material was integrated into a simulated building,and its thermal management performance was investigated.The results showed that the phase change houses had obvious thermal buffering effects under simulated light,and the composite phase change materials had great potential for thermal management applications.
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基金资助
河南省研究生教育创新培养基地项目(YJS2021JD05);河南省科技攻关项目(242102240090);郑州轻工业大学博士科研基金(2020BSJJ082)
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