Desarrollo de microcápsulas rígidas de fragancia y de técnicas que permitan la cuantificación de la eficiencia de encapsulación
- Autores: Carlos Garcia Carmona
- Directores de la Tesis: Manuel José Lis Arias (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2019
- Idioma: español
- Tribunal Calificador de la Tesis: Albert María Manich Bou (presid.), Diana Cayuela Marín (secret.), María Ángeles Bonet Aracil (voc.)
- Programa de doctorado: Programa de Doctorado en Ingeniería Textil y Papelera por la Universidad Politécnica de Catalunya
- Materias:
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- Resumen
From a long time, finishes have been developed with fragances; despite this fact, whatever the technology used to obtain the fragrance formulation, the final effect on the odor is very low. The smell usually disappears quickly because the volatile compounds responsible for this sensation evaporate uncontrollably, depending on their volatility or properties related to their molecular weight.
On the other hand, the technology of the microencapsulation of fragrances has also been known for years and, since then, it has not stopped being investigated, since it allows to: • Stabilize and protect the fragrance during storage.
• Reduce the losses of the first fragrance notes in a short time with the opening and dosing process.
• Reduce the evaporation rate of the fragrance and control it.
• Reduce the reactivity of the fragrance with the external environment.
• Allow a better dispersion of the aromatic active ingredient.
• Extend the life of use of the fragrance.
• Allow a controlled and gradual release at the time and place chosen.
In the same way that microencapsulation research technology has advanced in recent years, so have analytical techniques that allow the characterization of the product obtained through it. In this sense, as well as the size, morphology, or release of active principle have been controlled and determined with existing techniques and analytics, it has not been so with the efficiency of encapsulation, for which, although techniques have been developed that provide an approximation or a qualitative value of this parameter, these are not sufficiently precise yet.
Taking into account the aforementioned premises, the main objective of this thesis is the development of rigid fragrance microcapsules for indirect application in textile substrates and techniques that allow the quantification of the encapsulation efficiency carried out.
Therefore, it is sought that the obtained fragrance microparticles are fixed in the garments and textile substrates, and break by friction or mechanical stress, thus releasing the fragrance they contain. However, the application of the microcapsules in tissue will not be carried out directly -incorporating the microcapsules in the fiber during the spinning process or added in the finishing process-, but it will be carried out indirectly, making it the final consumer who makes the application by means of a fabric softener, through a washing cycle.
