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Bojana VONCINA

Bojana VONCINA. Associate Professor at Department of Textile Materials and Design, University of Maribor, Maribor, Slovenia Topic. CosmetoTextiles. SLOVENIA. MARIBOR. COSMETOTEXTILES. Bojana VONCINA 1 Department of Textile Materials and Design, University of Maribor, Maribor, Slovenia.

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Bojana VONCINA

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  1. Bojana VONCINA • Associate Professor at • Department of Textile Materials and Design, University of Maribor, Maribor, Slovenia Topic CosmetoTextiles

  2. SLOVENIA

  3. MARIBOR

  4. COSMETOTEXTILES Bojana VONCINA 1Department of Textile Materials and Design, University of Maribor, Maribor, Slovenia

  5. Cosmetotextile is a textile article containing a substance or a preparation that is released over time on different superficial parts of the human body, notably on skin, and claiming special properties such as cleaning, perfuming, changing appearance, protecting, keeping in good condition or correcting of body odors. ICTC 2009

  6. Molecular encapsulation Microencapsulation Encapsulation ICTC 2009

  7. Microencapsulation Microencapsulation is described as aprocess of enclosing micron- size particles ofsolids or droplets of liquids or gasses in aninert shell, which in turns isolates and protects then from the external environment. ICTC 2009

  8. The properties of microcapsuleshad to be adapted to the requirements of textile processing methods and uses of final products: • sizes, • shapes, • wall materials (urea-formaldehyde or melamine-aldehyde resins, cellulose derivatives), • way of application (coating, covalent bonding), • active substance release mechanisms. ICTC 2009

  9. Mechanisms by which the core material is released: Rupture of the capsule wall, • Mechanical rupture of the wall • Dissolution of the wall • Melting of the wall (thermal or UV/Vis radiation) • Biodegradation • Enzymatic degradation Diffusion through the wall • Slow release • Controlled release ICTC 2009

  10. Grafting of Ethylcellulose Microcapsules onto Cotton Fibres[1,2] Rosemary oil was encapsulated in ethylcellulose (EC) microcapsules using phase separation method [3]. Prepared capsules were analysed by SEM and Confocal Laser Fluorescence Microscopy. [1] Babtsov V, Shapiro Y., Kvitnitsky E., US Patent 6,932,984, 2005 [2] Voncina B, et al, Carbohydrate Polymers, in press ICTC 2009

  11. Regular spherical shape • The yield of the process was about 75%. • Microcapsules in the 10-90 μm size range were obtained (depends on stirring speed) ICTC 2009 [3] Badulescu R, et al, MEDTEX07, Bolton, UK

  12. The oil content of the dried microcapsules was 20-30%. • The average “empty space” in capsule is 40% Confocal laser fluorescence microscope ICTC 2009

  13. During the thermofixation at 120°C, simultaneously three reactions of esterification can occur: anchoring or binding ethylcellulose to hydroxyl groups of cellulose, crosslinking of cellulose and crosslinking of ethyl cellulose. ICTC 2009

  14. Molecular encapsulation Involves all intermolecular interactions where covalent bonds are not established betweenthe interacting species - SUPRAMOLECULAR CHEMISTRY [7] The majority of these interactions are of the host-guesttype. Among all potential hosts, the cyclodextrins (CD)are to be the most important ones ICTC 2009 [4] Szejtli J., Chem Rev 1998, 98, 1743-1753

  15. Structure and dimensions of cyclodextrins -cyclodextrin -cyclodextrin -cyclodextrin 0.65nm 0.85 nm 0.5 nm ICTC 2009

  16. Complexation of odour molecules β-CD. ICTC 2009

  17. Modification of PET with -cyclodextrin • Gain on mass ICTC 2009

  18. Measurement of fabrics handle *10 strong, 1 week **5 excellent, 1 poor Adsorption of textile using ammonia gas (JIS K0804) ICTC 2009

  19. Odor intensity measurements ICTC 2009

  20. Nano-assembly of -CD crosslinked with BTCA ICTC 2009

  21. Acknowledgement This research work has been supported financially by: • The Taiwan Textile Research Institute, Taipei; • The Marie Curie Transfer of Knowledge Project of the EC 6FP under the contract number MTKD-CT 2005-029540. I would like to thank Dr. Oliver Kreft from the Max Planck Institute of Colloids and Interfaces Potsdam, for measurements and his advices regarding the Confocal Laser Fluorescence Microscopy. ICTC 2009

  22. Thank you for your attention

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