Effects of dilution and age on perfume release from two mixed-surfactant
systems containing hydrotropes
Abstract
The study explores perfume encapsulation and release from micellar
solutions, emphasizing the impact of perfume-surfactant interactions and
micelle geometry. Examining two mixed-micelle systems with branched-tail
(ST2S/CAPB) and linear-tail (SLE1S/CAPB) surfactants, the research
systematically investigates the effects of time, perfume concentration,
and dilution on micelle geometry and headspace release. Utilizing SANS,
GC-MS, and statistical analyses, the study reveals stable systems over
time, with increased perfume content causing micelle growth and dilution
leading to micelle shrinkage. Both systems exhibit consistent trends in
micelle geometry, except the branched-tail system forming a lamellar
phase with added perfume. GC-MS headspace concentration correlates with
micelle geometry, influenced by tail group structure. The findings
contribute insights into the intricate dynamics of perfume-micelle
interactions, crucial for formulations in material science and actives
delivery.