Composite microcapsules with enhanced mechanical stability and reduced active ingredient leakage_中国颗粒学会

Composite microcapsules with enhanced mechanical stability and reduced active ingredient leakage_中国颗粒学会

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Partic. vol. 26 pp. 40-46 (June 2016)
doi: 10.1016/j.partic.2015.09.003

Composite microcapsules with enhanced mechanical stability and reduced active ingredient leakage

Yue Long^{a, b, *}, Kai Song^b, David York^c, Zhibing Zhang^d, Jon A. Preece^{a, *}

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longyue@mail.ipc.ac.cn j.a.preece@bham.ac.uk

Highlights

• Composite microcapsules were formed by encapsulating primary microcapsules in calcium shellac matrix. • In primary microcapsules oil was encapsulated in melamine formaldehyde or CaCO3 nanoparticle walls. • The composite microcapsules showed enhanced mechanical strength and reduced oil leakage. • Calcium shellac could be an effective barrier to protect the primary microcapsules from rupture.

Abstract

A calcium shellac (CS) matrix was used to encapsulate polymeric melamine formaldehyde microcapsules (A) or CaCO₃ nanoparticles-stabilized microcapsules (B), both of which encapsulated an oil-based active ingredient, producing A–CS or B–CS composite microcapsules. The mechanical properties and oil release profiles of the composite microcapsules were evaluated. The composite microcapsules showed enhanced mechanical stability and reduced leakage of the active ingredient by one order of magnitude.

Graphical abstract

Keywords

Composite; Microcapsule; Calcium shellac; Mechanical property; Control release; Perfume oil