利用低热固相化学反应法,一步制备出表面包覆SiO2的十六酸相变储能微纳米粒子.表面包覆SiO2的十六酸微粒由红外光谱,X射线衍射和差示扫描量热法进行了表征.结果表明:十六酸表面成功包覆了SiO2层,包覆后的颗粒呈球状,粒径大约为200nm,相转变温度为51.9℃,相变过程中的焓值为131.03J/g,具有良好的蓄热能力,可用于太阳能利用等方面的储能蓄热.
The synthesis of SiO2 coated palmitic acid (PA) nanoparticles via one-step,low heating temperature solid-state chemical reaction is reported. Analytical results of Infrared spectroscopy and X-ray diffraction prove that the palmitic acid (PA) was coated with a layer of SiO2.Morphology of scanning electron microscopy suggests that the sample is comprised of sphere-like nanoparticals with average diameter about 200nm.The as-prepared sample has been studied with differential scanning calorimetry (DSC).The transformation temperatures is 51.9℃and the fusion enthalpy are 3.36×104J/mol.The result shows that the sample possesses reasonable thermal property as a phase change material for latent heat energy storage application.
参考文献
| [1] | Cedeno FO.;Espina A.;Garcia JR.;Prieto MM. .Measurements of temperature and melting heat of some pure fatty acids and their binary and ternary mixtures by differential scanning calorimetry[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2001(1/2):39-50. |
| [2] | Baran G;Sar A .Phase change and heat transfer characteristics of a eutectic mixture of palmitic and stearic acids as PCM in a latent heat storage system[J].Energy Conversion and Management,2003,44(20):3227-3246. |
| [3] | Belen Zalba;Jose M Marin;Luisa F. Cabeza;Harald Mehling .Review on thermal energy storage with phase change: materials, heat transfer analysis and applications[J].Applied thermal engineering: Design, processes, equipment, economics,2003(3):251-283. |
| [4] | Peippo K;Kauranen K;Lund P D .A multicomponent PCM wall optimized for passive solar heating[J].Energy Build,1991,17(03):259-270. |
| [5] | Kaugusuz K .The viability of thermal energy storage[J].ENERGY SOURCES,1999,21:745-756. |
| [6] | A. Sari;K. Kaygusuz .Some fatty acids used for latent heat storage: thermal stability and corrosion of metals with respect to thermal cycling[J].Renewable energy,2003(6):939-948. |
| [7] | Cui H T;Hong G Y;Wu X Y et al.Silicon dioxide coating of CeO2 nanoparticles by solid state reaction at room temperature[J].Materials Research Bulletin,2002,37(13):2155-2163. |
| [8] | 贾殿赠;俞建群;夏熙 .一步室温固相化学反应法合成CuO纳米粉体[J].科学通报,1998,43(02):172-174. |
| [9] | Ye XR.;Yu JQ.;Xin XQ.;Xue ZL.;Jia DZ. .One-step solid-state reactions at ambient temperatures - A novel approach to nanocrystal synthesis[J].Advanced Materials,1999(11):941-942. |
| [10] | Rui-Ying Wang;Dian-Zeng Jia;Li Zhang;Lang Liu;Zai-Ping Guo;Bai-Qin Li;Jin-Xi Wang .Rapid Synthesis of Amino Acid Polyoxometalate Nanotubes by One-Step Solid-State Chemical Reaction at Room Temperature[J].Advanced functional materials,2006(5):687-692. |
| [11] | Craig S R;Hastie G P .Chain length dependent polymorphism in even number n-alkanes:line profile analysis of synchrotron powder X-ray diffraction data[J].Journal of Materials Science Letters,1996,15:1193-1196. |
| [12] | Zhang JJ.;He SM.;Wu KZ.;Liu XD.;Zhang JL. .Thermal studies on the solid-liquid phase transition in binary systems of fatty acids[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2001(1/2):157-160. |
| [13] | Ahmet Sari .Eutectic mixtures of some fatty acids for latent heat storage: Thermal properties and thermal reliability with respect to thermal cycling[J].Energy Conversion & Management,2006(9/10):1207-1221. |
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