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

2. 2 SLOVENIA

3. 3 MARIBOR

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

5. 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. 6 Encapsulation Molecular encapsulation Microencapsulation ICTC 2009

7. 7 Microencapsulation Microencapsulation is described as a process of enclosing micron- size particles of solids or droplets of liquids or gasses in an inert shell, which in turns isolates and protects then from the external environment. ICTC 2009

8. 8 The properties of microcapsules had 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. 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. 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. 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) [ 3] Badulescu R, et al, MEDTEX07, Bolton, UK ICTC 2009

12. 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. 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. 14 Molecular encapsulation [4] Szejtli J., Chem Rev 1998, 98, 1743-1753 Involves all intermolecular interactions where covalent bonds are not established between the interacting species - SUPRAMOLECULAR CHEMISTRY [7] The majority of these interactions are of the host-guest type. Among all potential hosts, the cyclodextrins (CD) are to be the most important ones ICTC 2009

15. 15  - cyclodextrin  -cyclodextrin  -cyclodextrin 0.5 nm 0.65 nm0.85 nm Structure and dimensions of cyclodextrins ICTC 2009

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

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

18. 18 Measurement of fabrics handle SampleKOSHI**SHARIFUKURAMI*HARI*T.H.V.** Untreated8.088.983.4312.232.72 115  C/10min 5.426.866.078.112.79 b-CD/BTCA/CA, 110  C/10min 6.938.804.3910.932.91! b-CD/BTCA/CA, 115  C/10min 7.008.944.4710.902.89! b-CD/BTCA/CA, 125  C/10min 9.097.135.8111.191.65 b-CD/BTCA/SHPI, 160  C/10min 10.407.924.3212.901.62 Adsorption of textile using ammonia gas (JIS K0804) * 10 strong, 1 week ** 5 excellent, 1 poor treateduntreated Initial conc. (ammonia)125ppm One hour conc. (ammonia)0ppm77ppm ICTC 2009

19. 19 Odor intensity measurements ICTC 2009

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

21. 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. 22 Thank you for your attention