Abstract
This paper demonstrated a novel magnetron sputtering method used for the improvement in thermal energy storage and retrieval rates of phase change materials (PCMs). The ten types of ternary fatty acid eutectics (i.e., CA–LA–MA, CA–LA–PA, CA–LA–SA, CA–MA–PA, CA–MA–SA, CA–PA–SA, LA–MA–PA, LA–MA–SA, LA–PA–SA and MA–PA–SA) were firstly prepared using five fatty acids such as capric acid (CA), lauric acid (LA), myristic acid (MA), palmitic acid (PA) and stearic acid (SA) and then selected as solid–liquid PCMs. Thereafter, magnetron sputter coating was used to deposit the functional silver (Ag) nanolayers onto the surface of electrospun polyacrylonitrile (PAN) nanofibrous mats serving as supporting skeleton. Finally, a series of composite PCMs were fabricated by adsorbing the prepared ternary eutectics into three-dimensional porous network structures of Ag-coated PAN membranes. The observations by EDX determined the formation of Ag nanolayers on the PAN nanofibers surface after magnetron sputtering. The SEM images illustrated that the Ag-coated PAN nanofibers appeared to have larger fiber diameter and rougher surface. Ag-coated PAN nanofibrous mats could effectively prevent the leakage of molten ternary eutectics and help maintain form-stable structure due to surface tension forces, capillary and nanoconfinement effects. The DSC results suggested that the phase change temperatures of the ternary fatty acid eutectics were obviously lower than those of individual fatty acids and their binary eutectics. The adsorption rates of ternary fatty acid eutectics in the composite PCMs were determined to be about 89–98 %. The thermal performance test indicated that the metallic coating of Ag dramatically improved the thermal energy storage and retrieval rates of the composite PCMs.
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References
Shukla A, Buddhi D, Sawhney RL. Solar water heaters with phase change material thermal energy storage medium: a review. Renew Sustain Energy Rev. 2009;13:2119–25.
Nithyanandam K, Pitchumani R, Mathur A. Analysis of a latent thermocline storage system with encapsulated phase change materials for concentrating solar power. Appl Energy. 2014;113:1446–60.
Zhou D, Zhao CY, Tian Y. Review on thermal energy storage with phase change materials (PCMs) in building applications. Appl Energy. 2012;92:593–605.
Cheng WL, Yuan XD. Numerical analysis of a novel household refrigerator with shape-stabilized PCM (phase change material) heat storage condensers. Energy. 2013;59:265–76.
Jankowski NR, McCluskey FP. A review of phase change materials for vehicle component thermal buffering. Appl Energy. 2014;113:1525–61.
Goli P, Legedza S, Dhar A, Salgado R, Renteria J, Balandin AA. Graphene-enhanced hybrid phase change materials for thermal management of Li-ion batteries. J Power Sources. 2014;248:37–43.
Kandasamy R, Wang XQ, Mujunidar AS. Application of phase change materials in thermal management of electronics. Appl Therm Eng. 2007;27:2822–32.
Ozturk HH. Experimental evaluation of energy and energy efficiency of a seasonal latent heat storage system for greenhouse heating. Energy Convers Manag. 2005;46:1523–42.
Onder E, Sarier N, Cimen E. Encapsulation of phase change materials by complex coacervation to improve thermal performances of woven fabrics. Thermochim Acta. 2008;467:63–72.
Regin AF, Solanki SC, Saini JS. Heat transfer characteristics of thermal energy storage system using PCM capsules: a review. Renew Sustain Energy Rev. 2008;12:2438–58.
Zeng JL, Sun LX, Xu F, Tan ZC, Zhang ZH, Zhang J, Zhang T. Study of a PCM based energy storage system containing Ag nanoparticles. J Therm Anal Calorim. 2007;87:369–73.
Zeng JL, Zhang J, Liu YY, Cao ZX, Zhang ZH, Xu F, Sun LX. Polyaniline/1-tetradecanol composites form-stable PCMS and electrical conductive materials. J Therm Anal Calorim. 2008;91:455–61.
Sari A. Eutectic mixtures of some fatty acids for latent heat storage: thermal properties and thermal reliability with respect to thermal cycling. Energy Convers Manag. 2006;47:1207–21.
Sharma A, Shukla A, Chen CR, Dwivedi S. Development of phase change materials for building applications. Energy Build. 2013;64:403–7.
Yuan YP, Zhang N, Tao WQ, Cao XL, He YL. Fatty acids as phase change materials: a review. Renew Sustain Energy Rev. 2014;29:482–98.
Mngomezulu ME, Luyt AS, Krupa I. Structure and properties of phase-change materials based on high-density polyethylene, hard Fischer–Tropsch paraffin wax, and wood flour. Polym Compos. 2011;32:1155–63.
Cai YB, Song L, He QL, Yang DD, Hu Y. Preparation, thermal and flammability properties of a novel form-stable phase change materials based on high density polyethylene/poly(ethylene-co-vinyl acetate)/organophilic montmorillonite nanocomposites/paraffin compounds. Energy Convers Manag. 2008;49:2055–62.
Zhu FR, Zhang L, Zeng JL, Zhu L, Zhu Z, Zhu XY, Li RH, Xiao ZL, Cao Z. Preparation and thermal properties of palmitic acid/polyaniline/copper nanowires form-stable phase change materials. J Therm Anal Calorim. 2014;115:1133–41.
Cai YB, Gao CT, Zhang T, Zhang Z, Wei QF, Du JM, Hu Y, Song L. Influences of expanded graphite on structural morphology and thermal performance of composite phase change materials consisting of fatty acid eutectics and electrospun PA6 nanofibrous mats. Renew Energy. 2013;57:163–70.
Chen CZ, Wang L, Huang Y. Morphology and thermal properties of electrospun fatty acids/polyethylene terephthalate composite fibers as novel form-stable phase change materials. Sol Energy Mater Sol Cells. 2008;92:1382–7.
Harikrishnan S, Magesh S, Kalaiselvam S. Preparation and thermal energy storage behaviour of stearic acid-TiO2 nanofluids as a phase change material for solar heating systems. Thermochim Acta. 2013;565:137–45.
Chen Z, Shan F, Cao L, Fang GY. Synthesis and thermal properties of shape-stabilized lauric acid/activated carbon composites as phase change materials for thermal energy storage. Sol Energy Mater Sol Cells. 2012;102:131–6.
Fang XM, Zhang ZG, Chen ZH. Study on preparation of montmorillonite-based composite phase change materials and their applications in thermal storage building materials. Energy Convers Manag. 2008;49:718–23.
Li M, Kao HT, Wu ZS, Tan JM. Study on preparation and thermal property of binary fatty acid and the binary fatty acids/diatomite composite phase change materials. Appl Energy. 2011;88:1606–12.
Tang BT, Agi JS, Wang YM, Jia C, Zhang SF. Facile synthesis and performances of PEG/SiO2 composite form-stable phase change materials. Sol Energy. 2013;97:484–92.
Wei T, Zheng BC, Liu J, Gao YF, Guo WH. Structures and thermal properties of fatty acid/expanded perlite composites as form-stable phase change materials. Energy Build. 2014;68:587–92.
Mehrali M, Latibari ST, Mehrali M, Mahlia TMI, Metselaar HSC, Naghavi MS, Sadeghinezhad E, Akhiani AR. Preparation and characterization of palmitic acid/graphene nanoplatelets composite with remarkable thermal conductivity as a novel shape-stabilized phase change material. Appl Therm Eng. 2013;61:633–40.
Zhang ZG, Zhang N, Peng J, Fang XM, Gao XN, Fang YT. Preparation and thermal energy storage properties of paraffin/expanded graphite composite phase change material. Appl Energy. 2012;91:426–31.
Wei QF, Wang XQ, Gao WD. AFM and ESEM characterisation of functionally nanostructured fibres. Appl Surf Sci. 2004;236:456–60.
Wei QF, Wang YY, Wang XQ, Huang FL, Yang SW. Surface nanostructure evolution of functionalized polypropylene fibers. J Appl Polym Sci. 2007;106:1243–7.
Wang XF, Ding B, Sun G, Wang M, Yu J. Electro-spinning/netting: a strategy for the fabrication of three-dimensional polymer nano-fiber/nets. Prog Mater Sci. 2013;58:1173–243.
Yarin AL, Kataphinan W, Reneker DH. Branching in electrospinning of nanofibers. J Appl Phys. 2005;98:064501.
Ke HZ, Pang ZY, Xu YF, Chen XD, Fu JP, Cai YB, Huang FL, Wei QF. Graphene oxide improved thermal and mechanical properties of electrospun methyl stearate/polyacrylonitrile form-stable phase change composite nanofibers. J Therm Anal Calorim. 2014;117:109–22.
Ma GP, Yang DZ, Nie J. Preparation of porous ultrafine polyacrylonitrile (PAN) fibers by electrospinning. Polym Adv Technol. 2009;20:147–50.
Acknowledgements
This research was financially supported by the National High-tech R&D Program of China (No. 2012AA030313), Changjiang Scholars and Innovative Research Team in University (No. IRT1135), the Priority Academic Program Development of Jiangsu Higher Education Institutions, Industry-Academia-Research Joint Innovation Fund of Jiangsu Province (BY2012068), Science and Technology Support Program of Jiangsu Province (SBE201201094), National Natural Science Foundation of China (Nos. 51006046 and 51163014).
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Ke, H., Pang, Z., Peng, B. et al. Thermal energy storage and retrieval properties of form-stable phase change nanofibrous mats based on ternary fatty acid eutectics/polyacrylonitrile composite by magnetron sputtering of silver. J Therm Anal Calorim 123, 1293–1307 (2016). https://doi.org/10.1007/s10973-015-5025-y
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DOI: https://doi.org/10.1007/s10973-015-5025-y