TY - JOUR
T1 - The effect of surfactant chain length on the morphology of poly(methyl methacrylate) microcapsules for fragrance oil encapsulation
AU - Tasker, Alison Louise
AU - Hitchcock, James Paul
AU - He, Ling
AU - Baxter, Elaine Alice
AU - Biggs, Simon
AU - Cayre, Olivier Jean
PY - 2016/12/15
Y1 - 2016/12/15
N2 - The solvent evaporation method for producing microcapsules relies upon the correct wetting conditions between the three phases involved in the synthesis to allow core-shell morphologies to form. By measuring the interfacial tensions between the oil, polymer and aqueous phases, spreading coefficients can be calculated, allowing the capsule morphology to be predicted. In this work we explore the effect of surfactant chain length on capsule morphology using poly(methyl methacrylate) as the polymer and hexadecane as the core. We compared the predicted morphologies obtained using the polymer as a solid, and the polymer dissolved in dichloromethane to represent the point at which capsule formation begins. We found that using the polymer in its final, solid form gave predictions which were more consistent with our observations. The method was applied to successfully predict the capsule morphologies obtained when commercial fragrance oils were encapsulated.
AB - The solvent evaporation method for producing microcapsules relies upon the correct wetting conditions between the three phases involved in the synthesis to allow core-shell morphologies to form. By measuring the interfacial tensions between the oil, polymer and aqueous phases, spreading coefficients can be calculated, allowing the capsule morphology to be predicted. In this work we explore the effect of surfactant chain length on capsule morphology using poly(methyl methacrylate) as the polymer and hexadecane as the core. We compared the predicted morphologies obtained using the polymer as a solid, and the polymer dissolved in dichloromethane to represent the point at which capsule formation begins. We found that using the polymer in its final, solid form gave predictions which were more consistent with our observations. The method was applied to successfully predict the capsule morphologies obtained when commercial fragrance oils were encapsulated.
KW - Encapsulation
KW - Morphology
KW - Polymeric microcapsules
KW - Wetting
UR - http://www.scopus.com/inward/record.url?scp=84983543676&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2016.08.058
DO - 10.1016/j.jcis.2016.08.058
M3 - Article
C2 - 27572610
AN - SCOPUS:84983543676
VL - 484
SP - 10
EP - 16
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
ER -