Microencapsulação de salicilato de metila via polimerização in situ para aplicação em tecido de poliéster

Abstract

Over the last decades, the textile industry has concentrated its efforts on the development of techniques that add value to the final product, increasing better market competitiveness. Among these, we can mention the production of functionalized textile substrates with new properties, without compromising their main characteristics, such as touch, malleability and visual aspect. This functionalization can be achieved through the application of microcapsules that contain a specific active ingredient, in the form of a textile finish. However, some substances cannot be applied only with direct deposition on substrates because they have disadvantages, such as high volatility and the need for controlled release, such as methy] salicylate, which is widely used to treat muscle pain. However, the microencapsulation of these substances solves this problem, as it protects the substance and promotes a controlled release. Therefore, the present research developed a textile finishing for 100% polyester fabrics, using methyl salicylate microcapsules obtained via in situ polymerization technique, using a melamine-formaldehyde resin as wall material. For the evaluation of the microcapsules, they were used encapsulation efficiency technique by UV-VIS which obtained 98.77%, diameter estimation by dynamic light scattering (DLS) which found an average diameter of 733.99 nm and thermogravimetric analysis (TGA). After, the microcapsules were applied in a textile matrix by the pad-dry-cure technique. Therefore, they were evaluated by grafiting, which was found 5% o.w.f., and finally, scanning electron microscopy (SEM), in order to analyze the morphology and dispersion of the microcapsules. 100% polyester can be functionalized from microcapsules via in situ polymerization, still, it can be considered a promising possibility for the development of functional sports textile articles.