Nano-encapsulated n-nonadecane using vinyl copolymer shell for thermal energy storage medium

Abstract

This study is focused on the preparation and characterisation of n-nonadecane-vinyl copolymer shell nanocapsules for thermal energy storage medium. The n-nonadecane nanocapsules were prepared by a one-step miniemulsion in situ polymerisation method. n-Nonadecane was used as a core while styrene (St) and methylmethacrylate (MMA) was used as a vinyl copolymer shell. The Fourier transform infrared results confirmed that n-nonadecane nanocapsules were successfully synthesised. Morphological characteristic analysis indicates that these nnonadecane nanocapsules that were prepared using St/MMA (4:1) have a spherical shape and a narrow particle size distribution, with an average diameter of 160±11 nm. The maximum encapsulation ratio for n-nonadecane nanocapsules is 45.8 wt%. The DSC result of pure n-nonadecane and n-nonadecane nanocapsules exhibits two different peaks, which are related to their carbon numbers. The temperature and latent heat of melting and freezing of the n-nonadecane nanocapsules were determined to be 33.1 o C, 76.9 J/g and 30.2 o C, 82.0 J/g, respectively. Moreover, n-nonadecane nanocapsules exhibit good thermal and chemical stability, even after 1000 cycles of a thermal cycling test. Based on all of the results, it can be concluded that the n-nonadecane nanocapsules exhibit better energy storage and have good potential for buildings, textiles or other applications.

Encapsulation methods for phase change materials – A critical review

“…According to the research from Khadiran et al [139] , an n-Nonadecane encapsulated copolymer of styrene (St) and methylmethacrylate (MMA) was successfully achieved by one-step miniemulsion in-situ polymerization. The ratio of the two copolymer components is crucial to prepare well-performed capsules.…”

Bioactive compounds from fresh water green macro algae of Ganga water

“…1-Heneicosanol Activity against Staphylococcus aureus (ATCC 29213) and Pseudomonas aeruginosa (ATCC 27853) as well as against [38] Candida albicans (NIM 982879) and C. krusei(ATCC 6258) 17. Borane, diethyl(decyloxy)-antifungal, antibacterial, and anticancer activity [39] 18. NONADECANE Good energy storage potential for building applications.…”

Methods for the Synthesis of Phase Change Material Microcapsules with Enhanced Thermophysical Properties—A State-of-the-Art Review

“…The most common polymers used for microencapsulation of PCMs via emulsion polymerization are PMMA [114,115], polystyrene [116]. poly(styrene-co-ethylacrylate) [117], nnonadecane-vinyl copolymer [118], and poly(methyl methacrylate-co-methacrylic acid) [119]. Sari et al (2010) [114] synthesized a novel n-heptadecane/polymethylmethacrylate mPCM by means of the emulsion polymerization method.…”