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Latent Heat Enhancement of Paraffin Wax in Poly(divinylbenzene-co-methyl methacrylate) Microcapsule |
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| Authors: | Sililuk Namwong Sayrung Noppalit Masayoshi Okubo Somporn Moonmungmee |
| Affiliation: | 1. Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathumthani, Thailand;2. Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan;3. Thailand Institute of Scientific and Technological Research, Klong Luang, Pathumthani, Thailand |
| Abstract: | The preparation of divinylbenzene (DVB)-methyl methacrylate (MMA) copolymer microcapsule encapsulated Rubitherm27 (RT27) P(DVB-co-MMA)/RT27 used as heat storage material by the microsuspension polymerization was studied to improve the latent heats of the encapsulated RT27 with sufficient polymer shell strength. Percent loading of RT27 and DVB:MMA ratio were optimized. The optimal condition was 30% loading of RT27 and 30:70 (% w/w) of DVB:MMA ratio. The nonspherical microcapsules with a dent having core-shell morphology were obtained. The thermal properties of the encapsulated RT27 in the P(DVB-co-MMA)/RT27 capsules were measured by thermogravimetric analyzer and differential scanning calorimeter. The heats of melting (ΔHm; 153 J/g-RT27) and crystallization (ΔHc; 164 J/g-RT27) of the encapsulated RT27 in the prepared copolymer capsules were higher than those in PDVB and closed to those of bulk RT27 (162 and 168 J/g-RT27 for ΔHm and ΔHc, respectively). |
| Keywords: | Heat storage material Latent heats Microsuspension polymerization Poly(divinylbenzene-methyl methacrylate) microcapsule |