Study on Adsorption of Essential Oils on Polylactic Acid Microparticles

Polylactic acid (PLA) is a biodegradable polymer that widely used in medical devices, drug delivery systems, fibers for packaging containers and textiles. However, given interactions between the materials contact with it affect its applications, important to study adsorption diffusion properties. The capacity of different polylactic particles regarding additives, e.g. essential oils (Thymus vulgaris, Melissa officinalis Foeniculum vulgare), was investigated. PLA microparticles various sizes were prepared by solvent emulsification evaporation method. In this study, specific on also investigated, which related solubility parameters oils. experiments performed using three solutions ethanol as solvent. Two sets solvents particle sizes. exhibited properties depending their production. Samples dichloromethane had higher oil uptake than those chloroform. solution did not change significantly (∼60%) varying either type preparation or size. affects microparticles. Among components Hansen (HSPs), polarity strongly adsorption.