摘要
工业固废兰炭灰(SCA)大量堆积会造成局部生态环境破坏,为促进工业固废兰炭灰的规模化消纳及复合相变储热材料(SSPCCs)的低成本制备,创新提出兰炭灰作为骨架材料制备复合相变储热材料。为研究兰炭灰骨架复合相变储热材料的可行性,制备了8种不同比例的NaNO_(3)/兰炭灰复合相变储热材料,采用差示扫描量热法、激光导热分析法、微观形貌分析法、定速加压法和X射线衍射法对NaNO_(3)/兰炭灰复合相变储热材料的关键性能进行表征。结果表明,未发生明显泄露和形变的样品NaNO_(3)/SCA-50具有最佳兰炭灰与NaNO_(3)质量比(5∶5),其抗压强度达到96.98 MPa,100~380℃范围内储热密度达到338.24 J/g;经4027次加热/冷却循环后,样品NaNO_(3)/SCA-50保持良好的热稳定性和化学相容性。兰炭灰作为骨架材料制备复合相变储热材料具有较好的可行性,为工业固废兰炭灰的资源化利用提供了新的途径。
The massive accumulation of industrial solid waste semi-coke ash(SCA)will cause damage to local ecological environment.To promote the large-scale consumption of industrial solid waste semi-coke ash and fabricate low-cost shape-stable phase change composites(SSPCCs),semi-coke ash was innovatively proposed as a skeleton material to fabricate the SSPCCs.To evaluate the feasibility of the semi-coke ash as the skeleton material of the SSPCCs,eight NaNO_(3)/semi-coke ash SSPCC samples with different mass ratio of the semi-coke ash to NaNO_(3) were fabricated.The key performance of the NaNO_(3)/semi-coke ash SSPCCs were investigated by the differential scanning calorimetry,laser flash analysis,scanning electron microscopy,constant speed pressurization method and X-ray diffraction.Results show that the sample NaNO_(3)/SCA-50 without visual leakage and deformation holds the optimal mass ratio 5:5 of the semi-coke ash to NaNO_(3) with the thermal energy storage capacity of 338.24 J/g ranging from 100 to 380℃and the mechanical strength of 96.98 MPa.After 4027 heating/cooling cycles,the sample NaNO_(3)/SCA-50 keeps good thermal stability and chemical compatibility,which indicates that the semi-coke ash is feasible for the SSPCCs fabrication,and provides a new way for recycling the resource of the solid waste semi-coke ash.
作者
药晨华
熊亚选
任静
宋超宇
王辉祥
丁玉龙
YAO Chenhua;XIONG Yaxuan;REN Jing;SONG Chaoyu;WANG Huixiang;DING Yulong(Beijing Key Lab of Heating,Gas Supply,Ventilating and Air Conditioning Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Building Research Institute CO.,LTD.of CSCEC,Beijing 100076,China;Birmingham Center for Energy Storage,University of Birmingham,Birmingham B152TT,UK)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2023年第1期300-309,共10页
Acta Materiae Compositae Sinica
基金
北京市教委科研项目(KM201910016011)。
关键词
固废
骨架材料
复合材料
储热性能
力学性能
热稳定性
solid waste
skeleton material
composite material
thermal energy storage property
mechanical property
thermal stability