By a News Reporter-Staff News Editor at Energy Weekly News -- Investigators discuss new findings in Minerals. According to news reporting from Chengdu, People's Republic of China, by VerticalNews journalists, research stated, "Based on the theoretically calculated mass ratio and the melting temperature of ternary eutectic mixtures, the ternary eutectic mixture of lauric acid (LA), myristic acid (MA) and palmitic acid (PA) was prepared firstly. The differential scanning calorimetry (DSC) results indicated that the eutectic mixture was composed by LA, MA and PA in the ratio of 55.24:29.74:15.02 (by mass)."
The news correspondents obtained a quote from the research from Southwest Jiaotong University, "Then the LA-MA-PA was absorbed in expanded graphite (EG), which acts as a supporting material, to prepare six kinds of composite phase change material (PCM). The optimal mass ratio of LA-MA-PA to EG is found. The SEM, FT-IR and DSC comprehensive characterization results show that EG interacted with the capillary tubes and surface tension of LA-MA-PA via its porous structure, instead of any chemical action. At the maximum mass ratio of LA-MA-PA to EG of 18:1 (by mass), the phase change temperature and latent heat of LA-MA-PA ternary eutectic mixture were 31.41 degrees C and 145.8 J/g respectively; and the LA-MA-PA/EG composite PCM had a phase change temperature of 30.94 degrees C and a latent heat of 135.9 J/g, and the thermal conductivity of the LA-MA-PA/EG was measured as 1.67 W/m K, a sharp increase than that of LA-MA-PA. Thermal cycling test showed that the LA-MA-PA/EG composite had a good thermal reliability."
According to the news reporters, the research concluded: "Based on all results, it was concluded the prepared LA-MA-PA/EG composite PCM has a proper melting temperature and latent heat for low temperature thermal storage."
For more information on this research see: Preparation and characterization of lauric-myristic-palmitic acid ternary eutectic mixtures/expanded graphite composite phase change material for thermal energy storage. Chemical Engineering Journal, 2013;231():214-219. Chemical Engineering Journal can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Chemical Engineering Journal - www.elsevier.com/wps/product/cws_home/601273)
Our news journalists report that additional information may be obtained by contacting N. Zhang, Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, People's Republic of China. Additional authors for this research include Y.P. Yuan, X. Wang, X.L. Cao, X.J. Yang and S.C. Hu.
Keywords for this news article include: Asia, Carbon, Chengdu, Graphite, Minerals, Nanotechnology, Emerging Technologies, Phase Change Material, Thermal Energy Storage, People's Republic of China
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