IMPROVEMENT OF MICROCAPSULES ADHESION TO FABRICS ABSTRACTThe presence of microcapsules has increased in textile field. They have been applied as a possibility to introduce new products to textiles such as fragrances, antibiotic, skin hydrant, etc. This work studies the resin influence on the adhesion of microcapsules to cotton fabrics. To paste microcapsules to fabrics, they should be in contact with a bath which contains microcapsules resin and water. Different resin concentrations were applied to fragrances microcapsules bath by impregnation. The research was focused to determine the influence of resin quantity in the microcapsules resistance to go out from the fabrics while washing treatments. Two experimental techniques, Scanning Electron Microscopy (SEM) and Counter apparatus, are used in order to determinate this influence.We can conclude that with higher quantity of resin, more microcapsules remain on the fabric surface. It is shown than longer microcapsules go out from the fabric faster than the little ones. KEY WORDS Adhesion Resin Microcapsules FabricCotton

An essential oil is the volatile lipophilic component extracted from plants. Microencapsulation systems protect the essential oil from degradation and evaporation, and at the same time allow a sustained release. This work analyzed and characterized the rosemary essential oil microcapsules prepared by co-extrusion technique using alginate as wall material and calcium chloride as cross linker. Several instrumental techniques were used: optical microscopy, coulter counter, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), termogravimetric analysis (TGA), spectrophotometry, antimicrobial test and chromatography. Results show that rosemary oil has pesticidal properties, and its microencapsulation allows knowing that these properties remain inside the microcapsules.

Microcapsules are widely used, being one of the fields which has increased their consumption the textile one. They can be applied to textiles using different methods such as, padding, bath exhaustion, spraying and foaming. Although the most extended industrial application is by padding commercial brands also suggest bath exhaustion as a possible procedure. In the research reported herein, bath exhaustion treatments are compared to padding. XPS (Photoelectronic spectroscopy of X-Rays) technique showed it was a suitable method to detect microcapsules presence on fabric surface. Results reported that high concentrations were required to obtain similar behaviours to those of padding. Moreover, we suggested reusing bath exhaustion baths, in order to minimise the loss of so much product in wastewater. We concluded it was not possible because microcapsules deflate when get in touch with water for a period of time, and what is more interesting, microcapsules preparation must be done just immediately before they are going to be used, so as to avoid microcapsules deflation due to contact with water.

Bonet Aracil, MA.; Monllorpérez, P.; Capablanca Francés, L.; Gisbert Paya, J.; Díaz-García, P.; Montava Seguí, IJ. (2015). A comparison between padding and bath exhaustion to apply microcapsules onto cotton. Cellulose. 22(3)

An essential oil is the volatile lipophilic component extracted from plants. Microencapsulation systems protect the essential oil from degradation and evaporation, and, at the same time, allow a sustained release. This work analyses and characterizes the oregano and sage essential oil microcapsules prepared by interfacial polymerization technique, using polyurea as wall material. Several instrumental techniques are used: optical microscopy, size particle, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), Termo gravimetric analysis (TGA), spectrophotometry, antimicrobial test and chromatography. Results show that oregano and sage oil have antimicrobial properties, and their microencapsulation allows knowing that these properties remain inside the microcapsules.