采用十八醇(OA)、硬脂酸(SA)、纳米氧化锌(纳米ZnO)、微米铜(Cu)、膨胀石墨(EG)按63.85∶36.15∶1.00∶1.00∶8.00质量配合比混合制得OA/SA/纳米ZnO/Cu/EG复合材料。采用扫描电子显微镜(SEM)、红外光谱(FT-IR)、差示扫描量热仪(DSC)、热重分析仪(TGA)及导热系数仪,表征其形貌、化学结构、热学性能和导热性能。结果表明,OA/SA/纳米ZnO/Cu/EG复合材料相变温度为55.38℃,相变潜热为195.4J/g,失重范围为213.27～359.05℃,失重率为91.8%,具有较好的热性能,经300次冷热循环后性能稳定。OA/SA/纳米ZnO/Cu/EG相变材料具有合适的相变温度,较高的潜热以及较低的成本,在储能系统尤其是保温容器中具有较大的应用潜力。
The composites of octadecylAlcohol (OA),stearic acid (SA),nanometer zinc oxide(nano ZnO),micron copper and expanded graphite(EG) were prepared at the mass ratio of 63.85∶36.15∶ 1.00∶1.00∶8.00.The morphology,chemical structure,thermal properties and thermal conductivity of the composite phase change material were Characterized by scanning electron microscope(SEM),fourier transform infrared spectroscopy(FT-IR),differential scanning calorimeter (DSC),thermogravimetry analysis (TGA) and thermal conductivity meter.The results shown that phase change temperature and latent heat of composites were 55.38℃and 195.4J/g,respectively,the thermal decomposition temperature was 213.27～359.05℃,the thermal conductivity and heat storing and releasing efficiency were increased.After repeated 300 thermal cycles,the composite still shown good thermal stability.Hereby,the composite phase materials show large potential in thermal storage,especially in insulated container,because of suitable phase change temperature,high latent heat,good thermal stability and low cost.
[1] 张仁元.相变材料与相变储能技术[M].北京:科学出版社,2009.
[2] Sharma A,Tyagi V V,Chen C R,et al.Review on thermal energy storage with phase change materials and applications[J].Renewable & Sustainable Energy Reviews,2009,13(2):318-345.
[3] 张寅平,孔祥冬,葛新石,等.一种速冷后能保温的新颖容器──传热分析[J].中国科学技术大学学报,1994,24(3):384-389.
[4] 叶东,栾建凤,朱培元,等.相变保温材料在血液长途运输中的应用[J].中国输血杂志,2008,21(8):581-582.
[5] 李毅,高海兴,付森.一种基于复合相变材料的保温杯套:中国,CN204743561U[P].2015-11-11.
[6] Zhong Y,Guo Q,Li S,et al.Heat transfer enhancement of paraffin wax using graphite foam for thermal energy storage[J].Solar Energy Materials & Solar Cells,2010,94(6):1011-1014.
[7] Hasnain S M.Review on sustainable thermal energy storage technologies,Part Ⅰ:heat storage materials and techniques[J].Energy Conversion & Management,1998,39(11):1127-1138.
[8] Sar₁A,Karaipekli A.Preparation,thermal properties and thermal reliability of palmitic acid/expanded graphite composite as form-stable PCM for thermal energy storage[J].Solar Energy Materials & Solar Cells,2009,93(5):571-576.
[9] Sang W C,Yoon K H,Jeong S S.Morphology and thermal conductivity of polyacrylate composites containing aluminum/multi-walled carbon nanotubes[J].Composites Part A Applied Science & Manufacturing,2013,45(2):1-5.
[10] 田云峰,李珍,王洋,等.石蜡/不同粒径膨胀石墨复合相变储热材料的制备和性能[J].材料研究学报,2015,29(4):262-268.
[11] 陆威,吴永卫.纳米铝粉/石蜡/膨胀石墨复合相变材料的制备及性能研究[J].热能动力工程,2017,32(2):101-105.
[12] 徐杰成,王家俊.氧化铝填充LLDPE复合材料的导热性能研究[J].浙江理工大学学报,2008,25(5):512-515.
[13] Vinod V S,Varghese S,Kuriakose B.Aluminum powder filled nitrile rubber composites[J].Journal of Applied Polymer Science,2010,91(5):3156-3161.
[14] 周文英,丁小卫.导热高分子材料[M].北京:国防工业出版社,2014.
[15] Tian Y,Zhen L I,Yang W,et al.Preparation and performance of a phase change heat storage composite of paraffin/different pparticle sized expanded draphite[J].Chinese Journal of Materials Research,2015,29(4):262-268.
[16] Ahmet Sari K.Thermal energy storage system using some fatty acids as latent heat energy storage materials[J].Energy Sources,2001,23(3):275-285.
[17] Karaipekli A,Sar₁ A.Preparation,thermal properties and thermal reliability of eutectic mixtures of fatty acids/expanded vermiculite as novel form-stable composites for energy storage[J].Journal of Industrial & Engineering Chemistry,2010,16(5):767-773.
[18] 王继芬.含无机纳米颗粒复合相变储能材料的制备及热性能研究[D].上海:华东理工大学,2011.
[19] 胡芃,于晶晶,王向往.棕榈酸/膨胀石墨复合相变材料的制备及性能研究[J].工程热物理学报,2017,38(3):464-469.
[20] 郑文娟.石蜡/铜纳米粒子复合相变材料储热性能的研究[D].青岛:青岛科技大学,2012.
基金资助
国家一流学科建设轻工技术与工程(LITE2018-29);国家自然科学基金(51205167);江苏省自然科学基金(BK20151128);江苏省333工程(BRA20131360)
PDF
(2291KB)
