将木材通过高温碳化的方法制备三维生物质碳基材料用于相变材料载体,制备复合相变材料,并对复合相变材料进行结构表征、性能测试及防泄漏实验。结果表明:多孔碳载体材料导热孔道网络完整,保证了有机相变材料的高效稳定负载量;相比于纯相变材料,70% PA@GNS热导系数达到了0.763W/(m·K),提高了3.18倍;含有20%多孔碳复合材料的潜热值达到了182J/g,比理论值潜热值高了约7%;并能有效防止相变材料泄漏。
In this study,a three-dimensional biomass carbon-based material was prepared by carbonization of wood at high temperature and used as phase change material (PCM) carrier to prepare composite PCMs.The structure characterization,performance test and leakage prevention experiment of the composite PCMs were carried out.The results showed that the porous carbon carrier material had a complete network of heat conduction pores,which ensured the high efficient and stable load of the organic phase change material.The thermal conductivity of 70% PA@GNS reached 0.763W/(m·K),which was 3.18 times higher than that of pure phase change material.The latent heat value of the composite PCM with 20wt% porous carbon reached 182J/g,which was about 7% higher than the theoretical latent heat value,and it could effectively prevent the leakage of phase change material.
[1] Nazir H,Batool M,Osorio F J B,et al.Recent developments in phase change materials for energy storage applications:a review[J].International Journal of Heat and Mass Transfer,2019,129:491-523.
[2] Ma G,Liu S,Xie S,et al.Binary eutectic mixtures of stearic acid-n-butyramide/n-octanamide as phase change materials for low temperature solar heat storage[J].Applied Thermal Engineering,2017,111:1052-1059.
[3] Zhao Y,Min X,Huang Z,et al.Honeycomb-like structured biological porous carbon encapsulating PEG:a shape-stable phase change material with enhanced thermal conductivity for thermal energy storage[J].Energy and Buildings,2018,158:1049-1062.
[4] Yang J,Tang L S,Bai L,et al.High-performance composite phase change materials for energy conversion based on macroscopically three-dimensional structural materials[J].Materials Horizons,2019,6(2):250-273.
[5] Chao W,Yang H,Cao G,et al.Carbonized wood flour matrix with functional phase change material composite for magnetocaloric-assisted photothermal conversion and storage[J].Energy,2020,202:117636.
[6] Atinafu D G,Wang C,Dong W,et al.In-situ derived graphene from solid sodium acetate for enhanced photothermal conversion,thermal conductivity,and energy storage capacity of phase change materials[J].Solar Energy Materials and Solar Cells,2020,205:110269.
[7] Mehrali M,Tahan Latibari S,Rosen MA,et al.From rice husk to high performance shape stabilized phase change materials for thermal energy storage[J].RSC Advances,2016,6(51):45595-45604.
[8] Chen X,Gao H,Yang M,et al.Highly graphitized 3D network carbon for shape-stabilized composite PCMs with superior thermal energy harvesting[J].Nano Energy,2018,49:86-94.
[9] Zhu X,Wang Q,Kang S,et al.Coal-based ultrathin-wall graphitic porous carbon for high-performance form-stable phase change materials with enhanced thermal conductivity[J].Chemical Engineering Journal,2020,395:125112.
[10] Pettes M T,Ji H,Ruoff R S,et al.Thermal transport in three-dimensional foam architectures of few-layer graphene and ultrathin graphite[J].Nano Letters,2012,12(6):2959-2964.
[11] Li D,Cheng X,Li Y,et al.Effect of MOF derived hierarchical Co3O4/expanded graphite on thermal performance of stearic acid phase change material[J].Solar Energy,2018,171:142-149.
基金资助
中原科技创新领军人才项目(234200510011);河南省科技攻关项目(232102321089);郑州市协同创新专项(校重大重点项目培育)(2021ZDPY0107)
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