Encapsulation of methyl anthranilate in polymethyl methacrylate microcapsules using suspension polymerization
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Abstract
In this research, the preparation of polymethyl methacrylate (PMMA) microcapsule encapsulated essential oil as methyl anthranilate (MA) by suspension polymerization was studied. Iodine transfer radical suspension polymerization (suspension ITP) comparing with the conventional suspension polymerization (suspension CRP) was carried out to decrease the free PMMA particles in aqueous medium normally formed with the hydrophilic monomer. It was found that the prepared microcapsules from both techniques were spherical with smooth surface. Using suspension ITP, the particle formation in aqueous medium was decreased approximately 50% of suspension CRP where the encapsulation efficiency was similar to that of the suspension CRP.
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