Preparation of Natural Composite Microcapsules Containing Orchid Black Currant Fragrance and its Sustained-Release Properties on Hair Bundle

摘要

Abstract In this paper, we developed an environmentally friendly microcapsules with natural materials to replace plastic microbeads used in personal care products and studied its functionality. The microcapsules with sustained release properties of orchid black currant fragrance were prepared by microemulsion method and using maltodextrin and resistant starch as wall materials. Fourier transform infrared spectroscopy (FTIR) spectra and thermogravimetric analysis (TG) indicated the fragrance was encapsulated into microcapsules successfully, and the encapsulation?ratio of microcapsule particles was 38. Scanning electron microscopy (SEM) and dynamic light scattering laser particle size analyzer (DLS) results showed the microcapsule particles were spherical, and the particle size ranged from 1.2 to 2.2?μm with the average particle size of 1.7?μm, which can stably attach to the hair and have good slow-release properties. Adding the microcapsules to the hair conditioner and treating the real hair bundle through electrostatic adsorption, the application efficacy, sustained-release and irritating effects of the microcapsules have been evaluated. The aroma retention rate of microencapsulated fragrance treated hair is much higher at 5, 7 and 21?days than that of unencapsulated fragrance treated one, and the sensory evaluation of the aroma intensity of the hair bundles treated with encapsulated fragrances vs. fragrances showed similar results to those obtained by electronic nose test. Meanwhile, the microcapsules’ irritation on corneal have been assessed by the hen's egg chorioallantoic membrane (HET-CAM) test. The test results indicated that the prepared fragrance microcapsules have no irritating effect to human cornea, and the microcapsules are safe, green and of environmental?friendliness.Graphic Abstract