Journal
SOLAR ENERGY
Volume 86, Issue 5, Pages 1149-1154Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2012.01.003
Keywords
n-octadecane; PEMA; Nanocapsules; Miniemulsion; Thermal physical property
Categories
Funding
- UK Engineering and Physical Science Research Council (EPSRC) [EP/F061439/1]
- National Natural Science Foundation of China [51176110]
- Birmingham Science City: Energy Efficiency and Demand Project [SY/SP8008]
- Engineering and Physical Sciences Research Council [EP/F061439/1] Funding Source: researchfish
- EPSRC [EP/F061439/1] Funding Source: UKRI
Ask authors/readers for more resources
In this paper, nanocapsules containing n-octadecane with an average 50 nm thick shell of poly(ethyl methacrylate) (PEMA) and poly (methyl methacrylate) (PMMA), and a core/shell weight ratio of 80/20 were synthesized by the direct miniemulsion method, respectively. The average size of the capsules is 140 nm and 119 nm, respectively. The chemical structure of the sample was analyzed using Fourier Transformed Infrared Spectroscopy (FTIR). Crystallography of nanocapsules was investigated by X-ray diffractometer. The surface morphology was studied by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The thermal properties and thermal stability of the sample were obtained from Differential Scanning Calorimeter (DSC) and Thermal Gravimetric Analysis (TGA). The temperatures and latent heats of melting and crystallizing of PEMA nanocapsule were determined as 32.7 and 29.8 degrees C, 198.5 and -197.1 kJ/kg, respectively. TGA analysis indicated that PEMA/octadecane nanocapsule had good thermal stability. The nanocapsules prepared in this work had a much higher encapsulation ratio (89.5%) and encapsulation efficiency (89.5%). Therefore, the findings of the work lead to the conclusion that the present work provides a novel method for fabricating nanoencapsulated phase change material, and it has a better potential for thermal energy storage. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available