Preparation and Properties of Fatty Acid/SiO2 Composite Phase Change Materials

doi:10.11901/1005.3093.2016.730

Chinese Journal of Materials Research

2017, Vol. 31

Issue (8): 591-596 DOI: 10.11901/1005.3093.2016.730

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Preparation and Properties of Fatty Acid/SiO₂ Composite Phase Change Materials

Lin LI¹, Dongxu LI^1,²(

), Shupeng ZHANG¹, Liguo WANG¹

1 College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
2 Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 211189, China

Cite this article:

Lin LI, Dongxu LI, Shupeng ZHANG, Liguo WANG. Preparation and Properties of Fatty Acid/SiO₂ Composite Phase Change Materials. Chinese Journal of Materials Research, 2017, 31(8): 591-596.

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Abstract

With capric acid (CA), lauric acid (LA), palmitic acid (PA), and myristic acid (MA) as raw materials, four kinds of ternary eutectic mixtures were prepared in consideration of the theoretical thermal property of the formed mixtures with the mass ratio of the three selected raw materials. Then LA-MA-PA/SiO₂ composite phase change materials were prepared by sol-gel method and their structure and performance were characterized. The results show that LA-MA-PA was uniformly filled into the three-dimensional network of SiO₂ and there was no chemical reaction between LA-MA-PA and SiO₂. LA-MA-PA/SiO₂ presented as smooth spherical particles with 3 μm in diameter, which exhibit smooth surface and good dispersibility. While the LA-MA-PA/SiO₂ exhibited high-performance in energy storage with little leakage even after 100 thermal cycling. The phase change temperature and latent heat of the LA-MA-PA/SiO₂ were determined to be 29.6℃ and 91.1 J/g.

Key words: inorganic non-metallic materials eutectic fatty acid sol-gel method silicon dioxide composite phase change material

Received: 14 December 2016

ZTFLH:

TU522

Fund: Supported by the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (No.2014BAL03B04)

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	Lin LI
	Dongxu LI
	Shupeng ZHANG
	Liguo WANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2016.730 OR https://www.cjmr.org/EN/Y2017/V31/I8/591

Fig.1 DSC curves of CA, LA, MA and PA

Table 1 Calculated values and tested results of eutectic fatty acid

Fig.2 Macrograph of LA-MA-PA/SiO₂

Fig.3 Microgram (a and b) of LA-MA-PA/SiO₂

Fig.4 FT-IR spectrum of samples

Fig.5 DSC curves of LA-MA-PA and composite phase change energy storage materials (a) LA-MA-PA, (b) LA-MA-PA/SiO₂

Table 2 Thermal properties comparison of LA-MA-PA/SiO₂ and composite phase change materials in the literature

Fig.6 TG curves of LA-MA-PA and composite phase change materials

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