生物炭/聚乙二醇复合相变材料的制备及其性能研究  

Study on preparation and properties of biochar-polyethylene glycol-based composite phase change materials

作　　者：张永文 杨郁 杨倩倩 李艳安 禹兴海[1,2,3] ZHANG Yong-wen;YANG Yu;YANG Qian-qian;LI Yan-an;YU Xing-hai(Institute of Flexible Composite Materials,Hexi University,Zhangye 734000,China;College of Chemistry and Chemical Engineering,Hexi University,Zhangye 734000,China;Key Laboratory of Hexi Corridor Resources and Utilization of Gansu,Hexi University,Zhangye 734000,China)

机构地区：[1]河西学院柔性复合材料应用基础研究所,甘肃张掖734000 [2]河西学院化学化工学院,甘肃张掖734000 [3]河西学院甘肃省河西走廊特色资源利用省级重点实验室,甘肃张掖734000

出　　处：《化学工程师》2024年第6期6-11,共6页Chemical Engineer

基　　金：河西学院第十三批大学生科技创新项目(126);甘肃省高等学校教师创新基金(2023B-164);大学生创新创业训练计划项目(202210740058);大学生创新创业训练计划项目(202310740016);甘肃省自然科学基金(23JRRG0010);甘肃省河西走廊特色资源利用省级重点实验室面上项目(XZ2309)。

摘　　要：利用农业废弃物玉米秸秆作为前驱体,经过高温煅烧、KOH刻蚀后获得比表面积较大的多孔生物炭(K-BC),再将一定比例的生物炭与聚乙二醇(PEG)于60℃真空浸渍,得到复合相变材料(C-PCMs)。利用比表面积及孔径分析仪(BET)、粉末X射线衍射仪(XRD)、扫描电子显微镜(SEM)、红外光谱仪(FTIR)和热重-差示扫描量热仪(TG-DSC)等对复合相变材料结构、储热性能、导电性及其稳定性进行测试表征。同时利用红外热成像技术对复合相变材料的光热、电热转换性能进行了研究。结果表明,当K-BC与PEG的质量比为1∶5时,复合相变材料的光热电热转换性能最佳。Herein,corn stalk,a typical agricultural solid waste,was employed as the precursors to prepared porous biochar with larger specific surface area via a high temperature calcination and KOH etching.Thereafter,polyethylene glycol was vacuum-impregnated into K-BC skeletons with a certain proportion in an oven at 60℃to fabricated composite phase change materials(c-PCMs).Various testing methods,including specific surface area and pore size analyzer(BET),powder X-ray diffraction(XRD),scanning electron microscope(SEM),infrared spectrometer(FTIR)and thermogravimetric-differential scanning calorimeter(TG-DSC)were carried out to characterize the structure of the c-PCMs.In addition,the heat storage performance,electrical conductivity and stability of the composite phase change material have been investigated too.Especially,infrared thermal camera was used to monitor the photo-thermal and electric-thermal conversion performance of the c-PCMs.The results show that the c-PCMs with the mass ratio of K-BC to PEG is 1∶5,possess extraordinary ability of photo-thermal and electric-thermal conversion.

关 键 词：生物炭 聚乙二醇 复合相变材料 能量转换 储热性能 

分 类 号：TK02[动力工程及工程热物理]