Isosorbide-based microcapsules for cosmeto-textiles

• Microcapsules based on renewable materials were designed for textile application.
• Isosorbide-based microcapsules were produced by interfacial polymerization.
• The microcapsules were characterized for their chemical composition and morphology.
• The microcapsules were characterized for their chemical composition and morphology. Finally, the behavior of such microcapsules for polyamide textile finishing was investigated so as to assess them with regards to their application for cosmeto-textiles.
• We report the amount of neroline present in textile after washing cycles.

New microcapsules based on renewable materials and containing perfume were designed for cosmeto-textile application. Such microcapsules contained the neroline fragrance as core material and a bio-based polyurethane as wall material. The polymer wall was synthesized by interfacial polycondensation of isosorbide and methylene bis(phenyl isocyanate). The chemical structure of the microcapsules was confirmed by IR and 1H NMR spectroscopies. The encapsulation efficiency of perfume was determined using 1H NMR analysis technique accounts for 30%. Microcapsules of spherical shape and 27 μm diameter consisted of a liquid core and a polymer wall, as revealed by means of small-angle light scattering measurements and scanning electron microscopy (SEM) observations. Neroline-loaded microcapsules were impregnated on polyamide textile substrate. The impregnation yield was about 80%. The presence of microencapsulated perfume and the durability of the impregnation effect were tested by SEM, UV–visible spectroscopy and gas chromatography. The polyamide knitting finished with microcapsules slowly released its microcapsule content and the neroline remained until twentieth washing cycles.