M. A. Tarek Sayed Mohamed Salem

Plasma-based surface modifications of polyester fabrics and their interaction with cationic polyelectrolytes and anionic dyes

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http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-83580

Kurzfassung in Englisch

Plasma-based surface modifications offer many interesting possibilities for the production of high value-added polymeric materials. In this work, different plasma-based synthetic concepts were employed to endow poly(ethylene terephthalate) (PET) fabrics with accessible amine functionalities. These concepts were compared to find out the appropriate engineering methods, which can be further accepted by textile industries to overcome the limited reactivity of PET fabric surfaces, while the bulk characteristics are kept unaffected. Amine functionalities were introduced onto the surface of PET fabrics using either low-pressure ammonia plasma treatment or coating oxygen plasma-treated PET fabric with cationic polyelectrolytes. Two different cationic polyelectrolytes were used in this study namely poly(diallyldimethylammonium chloride) as an example of strong polyelectrolytes and poly(vinyl amine-co-vinyl amide) as an example of weak polyelectrolytes. The modified surfaces were characterized by a combination of various surface-sensitive techniques such as X-ray photoelectron spectroscopy (XPS), electrokinetic measurements and time-dependent contact angle measurements. Furthermore, the amine functionalities introduced by different surface modifications were used for the subsequent immobilization of various classes of anionic dyes to evaluate the efficiency of different surface modifications. Color strength (K/S) and fastness measurements of colored fabrics were also explored. Their results can be taken as a measure of the extent of the interaction between different modified surfaces and anionic dyes. Finally, it was demonstrated that anchoring poly(vinyl amine-co-vinyl amide) layer onto PET fabric surfaces modified with low-pressure oxygen plasma is an efficient approach to improve coloration behavior and to overcome different problems related to PET fabrics coloration, such as coloration of PET/wool blend fabric with a single class of dyes. This is a crucial step towards the substrate independent surface coloration, which becomes dependent on the properties of the top layer rather than chemical structure of the fibers.

weitere Metadaten

Schlagwörter
(Deutsch)
poly(ethylene terephthalate) (PET), poly(vinyl amine-co-vinyl amide) (PVAm), XPS, zeta-potential, metachromacy, Plasma-Behandlung
Schlagwörter
(Englisch)
Plasma treatment, poly(ethylene terephthalate) (PET), adhesion, polyelectrolytes, poly(vinyl amine-co-vinyl amide) (PVAm), XPS, zeta-potential, metachromacy and anionic dyes
SWD SchlagworteAmine, Plasma, Polyelektrolyt, Polyester
DDC Klassifikation540
Institution(en) 
HochschuleTU Chemnitz
FakultätFakultät für Naturwissenschaften
ProfessurProfessur Polymerchemie
BetreuerDr. rer. nat. Frank Simon
GutachterProf. Dr. Stefan Spange
Prof. Dr. Brigitte Voit
DokumententypDissertation
SpracheEnglisch
Tag d. Einreichung (bei der Fakultät)01.11.2011
Tag d. Verteidigung / Kolloquiums / Prüfung04.01.2012
Veröffentlichungsdatum (online)08.02.2012
persistente URNurn:nbn:de:bsz:ch1-qucosa-83580

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