摘要
随着碳中和理念的逐步推进,调整能源供应政策,倡导低碳生活,可推动全社会的绿色发展,采用相变材料(PCMs)储存和释放热量,能够有效地利用可再生能源,可减少化石燃料带来的CO释放问题。本文利用石墨烯气凝胶作为相变材料的载体,分别采用不同比例的癸酸/石蜡进行有机相耦合,制备了一系列高封装率、低渗漏率的石墨烯定形相变材料。研究发现当石墨烯气凝胶定形相变材料中癸酸/石蜡为7∶3时,相变焓达到202.91J/g。经过200次循环后复合材料的相变潜热变化量在4.25%以内,渗漏率仅为3.20%。采用DSC、TG、XRD、SEM对材料进行微观结构分析说明,石墨烯气凝胶改善了相变介质的形状稳定性,有效地阻止了相变过程中耦合的有机相泄漏,使材料储放热稳定,增强了导热作用,具有良好的应用前景。
With the gradual advancement of the concept of carbon neutrality,adjusting energy supply policies and advocating low-carbon life can promote the green development of the whole society.The use of phase change materials(PCMs)to store and release heat can effectively use renewable energy and reduce the issue of COemissions caused by fossil fuels.In this paper,graphene aerogel is used as the carrier of phase change materials,and a series of graphene phase change materials with high coating rate and low leakage rate are prepared by using different ratios of decanoic acid/paraffin for organic phase coupling.The study finds that when the decanoic acid/paraffin wax ratio of the graphene aerogel shaped phase change material is 7∶3,the phase change enthalpy reaches 202.91J/g.After 200 cycles,the phase change latent heat change of the composite material is within 4.25%,and the leakage rate is only 3.20%.The use of DSC,TG,XRD,SEM to analyze the microstructure of the material shows that graphene aerogel improves the shape stability of the phase change medium,effectively prevents the coupled organic phase during the phase change process from leaking,and enables the material to store and release heat stably,enhances the thermal conductivity,and has good application prospects.
作者
白金刚
苑正己
刘雨
张义师
吕喜风
BAI Jingang;YUAN Zhengji;LIU Yu;ZHANG Yishi;LYU Xifeng(College of Chemistry and Chemical Engineering,Tarim University,Alar 843300,Xinjiang,China;Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps,Alar 843300,Xinjiang,China;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2022年第8期4441-4448,共8页
Chemical Industry and Engineering Progress
基金
有机无机复合材料国家重点实验室开放课题(oic-202001011)
国家自然科学基金(21968031)
塔里木大学物理化学一流本科课程建设(TDYLKC202121)
“课程思政”教学研究中心专项(TDGJSZ2109)
物理化学课程思政示范团队项目(TDKCSZ12101)。
关键词
石墨烯气凝胶
有机相耦合
低渗漏
定形相变材料
graphene aerogel
organic phase coupling
low leakage
form-stable phase change materials
