Publication: Encapsulation of octadecane in poly(divinylbenzene- co -methyl methacrylate) using phase inversion emulsification for droplet generation
2
Issued Date
2016-01-02
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15205738
10601325
10601325
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2-s2.0-84953432437
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry. Vol.53, No.1 (2016), 11-17
Suggested Citation
Siriluk Namwong, Md Zahidul Islam, Sayrung Noppalit, Pramuan Tangboriboonrat, Preeyaporn Chaiyasat, Amorn Chaiyasat Encapsulation of octadecane in poly(divinylbenzene- co -methyl methacrylate) using phase inversion emulsification for droplet generation. Journal of Macromolecular Science, Part A: Pure and Applied Chemistry. Vol.53, No.1 (2016), 11-17. doi:10.1080/10601325.2016.1110452 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/43382
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Title
Encapsulation of octadecane in poly(divinylbenzene- co -methyl methacrylate) using phase inversion emulsification for droplet generation
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Abstract
© 2016 Taylor & Francis. Octadecane (OD), a heat storage material, was encapsulated into poly(divinylbenzene-co-methyl methacrylate) or P(DVB-co-MMA) matrix via the microsuspension polymerization. The oil droplets were first generated by using the phase inversion emulsification, i.e., adding a sodium dodecyl sulphate (SDS) aqueous solution into an oil phase (monomers:OD = 1:1) containing various concentrations of poly(vinyl alcohol) (PVA). Results showed that 0.1 wt% of SDS in aqueous medium with the additional rate of 2 mL/min and 3 wt% of PVA in oil phase were the optimal conditions for the formation of nonspherical microcapsules. The smallest number- (dn) and weight- (dw) average diameters of P(DVB-co-MMA)/OD were, respectively, 3.1 and 3.2 μm with a narrow particle size distribution (dw/dn) of 1.02. The latent heats of the encapsulated OD increased with increasing MMA content of microcapsules. The heat of melting (ΔHm; 223 J/g-OD) and crystallization (ΔHc; 230 J/g-OD) of the OD encapsulated in microcapsules using DVB:MMA of 30:70 were higher than those using only PDVB (189 and 193 J g-OD for ΔHmand ΔHc, respectively) and comparable to those of bulk OD (233 and 234 J/g-OD for ΔHmand ΔHc, respectively). The obtained P(DVB-co-MMA)/OD microcapsules would be useful as high performance heat storage material.