Fabrication and characterization of electrospun porous cellulose acetate nanofibrous mats incorporated with capric acid as form-stable phase change materials for storing/retrieving thermal energy
- 17 July 2017
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Green Energy
- Vol. 14 (12), 1011-1019
- https://doi.org/10.1080/15435075.2017.1354298
Abstract
Electrospun cellulose acetate (CA) nanofibrous mats incorporated with capric acid was studied to fabricate form-stable phase change materials (PCMs) for storing/retrieving thermal energy. Electrospun CA nanofibrous mats with different porous structures and specific surface areas were firstly prepared through regulating the volume ratio of mixture solvent of acetone/dichloromethane (DCM). Effects of different volume ratio of mixture solvent and mat thickness on the morphological structure, specific surface area, and absorption capacity of CA nanofibrous mats were systematically investigated. The results indicated that CA nanofibrous mats were highly porous on the surface; hence, they were capable of absorbing a large amount of capric acid. The maximum absorption capacity of CA mats via electrospinning with volume ratio of acetone/DCM being 5/5 was ~95.8 wt%, due to its higher specific surface area of ~17.1 m2/g. The specific surface area and capric acid absorption capacity of CA nanofibrous mats increased with the increases of mat thickness. As the thickness of nanofibrous mats increased from 10 to 85 μm, the corresponding specific surface area and capric acid absorption capacity of mats increased respectively from 7.2 to 29.0 m2/g and 92.1 to 98.5%. Morphological structures, as well as the properties of thermal energy storage and thermal insulation of the fabricated form-stable PCMs, were studied by scanning electron microscopy, differential scanning calorimetry, and measurement of freezing times, respectively. The results indicated that the resulting form-stable PCMs could well maintain their phase transition characteristics and demonstrated great thermal energy storage capability and temperature regulation ability.Keywords
Funding Information
- Fundamental Research Funds for the Central Universities (JUSRP51621A)
- Jiangsu Universities "Qing Lan" Project (2016 [15])
- the Innovation Program of Jiangsu Graduate Education (KYCX17_1438)
- the Undergraduate Innovation and Training Program of Jiangnan University (2017235Y)
- High-level Innovative and Entrepreneurial Talents in Jiangsu Province (2015 [26])
This publication has 39 references indexed in Scilit:
- Electrospun porous cellulose acetate fibers from volatile solvent mixtureMaterials Letters, 2011
- A review of materials, heat transfer and phase change problem formulation for latent heat thermal energy storage systems (LHTESS)Renewable and Sustainable Energy Reviews, 2010
- Review on thermal energy storage with phase change materials and applicationsRenewable and Sustainable Energy Reviews, 2009
- Solar energy storage using phase change materialsRenewable and Sustainable Energy Reviews, 2007
- Preparation of porous ultrafine PGA fibers via selective dissolution of electrospun PGA/PLA blend fibersMaterials Letters, 2006
- Fatty Acids as Phase Change Materials (PCMs) for Thermal Energy Storage: A ReviewInternational Journal of Green Energy, 2005
- A review on phase change energy storage: materials and applicationsEnergy Conversion and Management, 2004
- A review on energy conservation in building applications with thermal storage by latent heat using phase change materialsEnergy Conversion and Management, 2004
- Poly(p-xylylene) Nanotubes by Coating and Removal of Ultrathin Polymer Template FibersMacromolecules, 2002
- Measurements of temperature and melting heat of some pure fatty acids and their binary and ternary mixtures by differential scanning calorimetryThermochimica Acta, 2001