MICROENCAPSULATED NEROLINE WITH NEW EPOXY RESIN SHELL BASED ON ISOSORBIDE: PREPARATION, CHARACTERIZATION AND APPLICATION TO COSMETOTEXTILE

New core shell microparticles made of a bio-based epoxy resin wall and having the neroline fragrance as a core material have been investigated for their preparation and properties, and their suitability for cosmetotextile applications has been evaluated. The wall material was made of a polycondensate of a bio-based epoxy-isosorbide prepolymer and methylene bisphenyl-isocyanate produced by interfacial polymerization. The prepolymer was diglycidyl ether of 1,4:3,6-dianhydro-D-sorbitol (DGEDAS) synthesized from isosorbide and epichlorohydrin in the presence of concentrated aqueous NaOH. It was characterized in details by means of chemical analyses by 1H NMR and IR spectroscopy, measurement of the molar mass distribution by size exclusion chromatography and mass spectrometry. Its interfacial polycondensation with methylene bisphenyl-isocyanate led to the formation of the isosorbide-based epoxy-urethane shell monitored by IR and TGA. The core-shell morphology of the microparticles was confirmed using optical microscopy and scanning electron microscopy. The microparticles were deposited onto textile fabrics by an impregnation process using a binding agent. The durability and the perfume release behaviour of the impregnated textile were evaluated through microscopic observations and Thin Layer Chromatography (TLC).