期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 555, 期 -, 页码 501-506出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2018.07.030
关键词
Paraffin wax emulsion; Coaxial electrospinning; Thermal energy storage; Phase change materials; Nanofibers mats
资金
- National Key R&D Program of China [2018YFD0700200]
- Project of Science and Technology Service Network initiative [KFJ-STS-QYZD-010]
- Major Science and Technology Project of Tibet Autonomous Region [ZD20170017]
- National Natural Science Foundation of China [51506205]
- Youth Innovation Promotion Association CAS [2017400]
- Special Plan of Guangdong Province [2015TQ01N714]
Inspired by the phase change materials (PCMs) based microcapsules, green phase change nanofibers mats with cores-heath structure based on paraffin wax emulsion (PWE) and polyvinyl alcohol (PVA) for thermal energy storage (TES) is obtained by coaxial electrospinning approach. The PWE could be encapsulated by PVA, simultaneously addressing the leakage issue effectively. In addition, the melting enthalpy (Delta H-m) increased from 3.16 J/g to 48.35 J/g as the core speed rate (R-core) increased from 0.1 to 2.0 it/min, indicating higher R-core can induce higher PWE encapsulation efficiency. Finally, the core-sheath structure PWE@PVA nanofibers mats have high Delta H-m of 48.25 J/g and freezing enthalpy (Delta H-c) of -47.75 J/g. Furthermore, only slightly decreasing tendency on the enthalpy can be observed after 500 heating-cooling cycles, demonstrating good TES stability and practicability of the as-prepared PWE@PVA nanofibers mats. Hence, this study offers new idea for the fabrication method of green PCMs.
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