Composite microcapsules with enhanced mechanical stability and reduced active ingredient leakage--颗粒学报PARTICUOLOGY

Long, Y., Song, K., York, D., Zhang, Z., & Preece, J. A. (2016). Composite microcapsules with enhanced mechanical stability and reduced active ingredient leakage. Particuology, 26, 40-46. https://doi.org/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 *

a School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
b Laboratory of Bio-Inspired Smart Interface Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
c Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9 J, UK
d School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

10.1016/j.partic.2015.09.003

Volume 26, June 2016, Pages 40-46

Received 13 March 2015, Revised 15 September 2015, Accepted 18 September 2015, Available online 3 December 2015, Version of Record 18 April 2016.

E-mail: 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

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