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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. - PowerPoint PPT Presentation
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Bojana VONCINA
• Associate Professor at
• Department of Textile Materials and Design, University of Maribor, Maribor, Slovenia
Topic
CosmetoTextilesCosmetoTextiles
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SLOVENIA
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COSMETOTEXTILES
Bojana VONCINA
1Department of Textile Materials and Design, University of Maribor, Maribor, Slovenia
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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.
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Encapsulation
Molecular encapsulation Microencapsulation
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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.
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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.
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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
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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
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• 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
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• The oil content of the dried microcapsules was 20-30%.
• The average “empty space” in capsule is 40%
Confocal laser fluorescence microscopeICTC 2009
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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.
H2C
HC
COOH
COOH
HC
H2C
COOH
COOH
Cell, EC
Catalyst, H
Cell O C CH2
O
CH
COOH
CH CH2
COOH
C
O
O EC
EC O C CH2
O
CH
COOH
CH CH2
COOH
C
O
O EC
Cell O C CH2
O
CH
COOH
CH CH2
COOH
C
O
O Cell
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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
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-cyclodextrin
-cyclodextrin-cyclodextrin
0.5 nm 0.65 nm 0.85 nm
Structure and dimensions of cyclodextrins
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Modification of PET with -cyclodextrin
0
2
4
6
8
10
12
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100/10 110/10 115/10A 115/10B 120/10 125/10 160/10
Treatement conditions: T [°C] / t [min]
Gai
n of
mas
s [%
]
Treated samples
1x washed
5x washed
10x washed
SHPI
• Gain on mass
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Measurement of fabrics handle
Sample KOSHI* *SHARI FUKURAMI* HARI* T.H.V.**
Untreated 8.08 8.98 3.43 12.23 2.72
115C/10min 5.42 6.86 6.07 8.11 2.79
b-CD/BTCA/CA, 110C/10min 6.93 8.80 4.39 10.93 2.91!
b-CD/BTCA/CA, 115C/10min 7.00 8.94 4.47 10.90 2.89!
b-CD/BTCA/CA, 125C/10min 9.09 7.13 5.81 11.19 1.65
b-CD/BTCA/SHPI, 160C/10min 10.40 7.92 4.32 12.90 1.62
Adsorption of textile using ammonia gas (JIS K0804)
* 10 strong, 1 week** 5 excellent, 1 poor
treated untreated
Initial conc. (ammonia) 125ppm 125ppm
One hour conc. (ammonia) 0ppm 77ppm
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Odor intensity measurements
Odour intensity of fabrics sprayed with parfume
0
0,5
1
1,5
2
2,5
3
3,5
4
1 2 3 4 5 6 7 8 9 10
Weeks
Sm
ell
inte
nsi
ty
CD,spray
BLIND, spray
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Nano-assembly of -CD crosslinked with BTCA
OO
O
O
COOH
COOH
OO
O
O
COOH
COOH
O
O
O O
HOOC
COOH
OO
O
O
COOH
COOH
O
O
O O
HOOC
COOH
OO
O
O
COOH
COOH
O
O
OO
HOOC
COOH
O
O
O
O
COOH
HOOC
OO
O
O
COOH
HOOC
O
O
O O
HOOC
COOH
O
O
O
O
HOOC
COOH
O
O
OO
HOOC
COOH
O
O
O
O
COOH
HOOC
O
O
O
O
COOH
HOOC
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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.
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Thank you for your attention
