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Adsorption and Desorption of Ionic Surfactants

Adsorption und Desorption von ionischen Tensiden
T. Pušić , A. M. Grancarić , A. Tarbuk , O. Šauperl and I. Soljačić

Abstract

Surfactants as organic compounds are widely used in the processes of textile finishing and care with regard to different variations and specific hydrophilic/hydrophobic character. Specific behaviour of these compounds is partly based on the adsorption process. In this study the adsorption and desorption of ionic surfactants have been studied upon the influence of fibre composition and surfactant ionogenity as well as variation of hydrophobic chain length and hydrophilic group in the molecule. Textile fibres were characterized through electrokinetic potential, sorption characteristics and swelling capacity expressed by moisture regain and water retention value (WRV). Different types of cationic and anionic surfactants were adsorbed on cotton, wool, polyester and polypropylene fibres at 20°C during 60 minutes. The quantity of adsorbed surfactants on textile fibres was determined by potentiometric titration. The textile fibres were centrifuged afterwards and the amount of surfactants was determined in the centrifugate, respectively. Drying followed at 60°C. The desorption of surfactants was performed at 20°C during 30 minutes. The results showed a correlation between amount of adsorbed, desorbed and residual surfactants and swelling capacity expressed through WRV.

Kurzfassung

Ionische Tenside werden als organische Verbindungen in der Textilveredlung und -pflege hinsichtlich ihrer verschiedener Varianten und ihres spezifischen hydrophilen/hydrophoben Charakters weitverbreitet verwendet. Das spezifische Verhalten dieser Verbindungen beruht teilweise auf dem Adsorptionsprozess. In dieser Studie wurden Adsorption und Desorption der ionischen Tenside auf den Einfluss der Faserzusammensetzung und die Ionogenität von Tensiden sowie die Veränderung der hydrophoben Kettenlänge und der hydrophilen Gruppe im Molekül geprüft. Die Textilfasern wurden durch elektrokinetisches Potenzial, Sorptionseigenschaften und Quellfähigkeit ausgedrückt durch Feuchtigkeitszuschlag und Wasserrückhaltewert (WRW) gekennzeichnet. Verschiedene kationische und anionische Tenside wurden bei 20°C auf den Baumwoll-, Wolle-, Polyester- und Polypropylenfasern 60 Minuten lang adsorbiert. Die Quantität der auf den Textilfasern adsorbierten Tenside wurde durch potenziometrische Titration bestimmt. Die Textilfasern wurden danach zentrifugiert, und die Menge der Tenside wurde in dem Zentrifugat bestimmt. Das Trocknen erfolgte bei 60°C. Die Desorption von den Tensiden wurde bei 20°C während 30 Minuten durchgeführt. Anhand der Ergebnisse konnte eine Korrelation zwischen der Menge von adsorbierten, desorbierten und restlichen Tensiden und der durch WRW ausgedrückten Quellfähigkeit ermittelt werden.


Prof. emeritus Ivo Soljačić, PhD, University of Zagreb, Faculty of Textile Technology, Prilaz baruna Filipovića 28a, 10000 Zagreb. E-Mail: , Tel.: ++38514877351, Fax: ++38514877357

Tanja Pušsić, Ph.D., was graduated from the Faculty of Technology, University of Zagreb, in 1986. She earned her MSc in 1990 and PhD in 1997, also from the University of Zagreb. She is employed at the Faculty of Textile Technology, Department of Textile Chemistry and Ecology as a senior researcher on subjects regarding textile finishing and care. Her special interests are topics as follows: bioscouring, electrokinetic phenomena, mercerization, adsorption and desorption of surfactants, detergency, fluorescent brightening agents in detergents, UV absorbers, dry and wet cleaning etc. The results of her work are presented in 35 papers published in scientific journals and books of conference proceedings. She has been a representative in the International Technical Committee for Textile care (ICTC) from 2005.

Ana Marija Grancarić, Ph.D., is Full Professor at Faculty of Textile Technology at University of Zagreb. She published 4 books, and she is Editor of NATO ARW book “Inteligent Textiles for Personal Protection and Safety”, 3 chapetrs in scientific books, 46 papers in refeered journals and 65 papers presented to scientific meetings. She was a leader of two national research projects, Croatian coordinator of 4 bilateral and 1 trilateral projects and Croatian partner of 2 EUREKA projects. Her topics are electrokinetic phenomena, surface free energy, hidrophylicity and hydrophobility of textiles, quenching of fluorescence, cotton mercerization and cationization, bioscouring of cotton, sunprotected and antimicrobal finishing and application of natural zeolite in textiles.

Anita Tarbuk, Ph.D., is working as assistant since 2002. at the University of Zagreb, Faculty of Textile Technology Zagreb, Croatia. She has got title of Diploma Engineer of Textile Technology in the field Textile Chemistry in 2001, and MSc in Technical Science, Textile Engineering in 2005., PhD in Technical Science, Textile Engineering in 2009. She is researcher in 3 national, and 8 international projects, as well. She has published – 3 chapters in the scientific book; 12 scientific papers in CC and SCI journals, 45 scientific papers in international conference proceedings, 4 professional papers and 2 reviews in journals. She attends more than 30 scientific conferences and workshops. In 2008 she won Annual award “Vera Johanides” for the best young scientist, from Croatian Academy of Engineering.

Assist. Prof. Olivera Šauperl, Ph.D., is member of the Institute for Engineering Materials and Design of the Faculty of Mechanical Engineering, University of Maribor which is well known for its research work on interaction of polymer surfaces with different liquid media. Her general activities comprise: fibres, fibre structure, surface chemistry, surface properties characterisation, fibre surface and bulk modification, interactions on fibres surfaces, standardised analysis of textile materials. Since 2004 she is Head of material testing in the laboratory for characterization and processing of polymers. Her profession is also pedagogical work in the Faculty of mechanical engineering University of Maribor.

Prof. emeritus Ivo Soljačić was born in Zagreb. His university level of education was reached at University of Zagreb: BSc in Chemical technology from Faculty of Technology; MSc Chemical Engineering from Faculty of Pharmacy and Biochemistry; PhD Chemical Engineering from Faculty of Technology. The special research and professional interests are finishing of textiles as well as textile care. He published over 200 scientific and professional papers, four books and three scripts. His special scientific and education contribution in the field of textile technology was rewarded by University of Zagreb and Croatian Academy of Textile Sciences.


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Received: 2009-07-17
Published Online: 2013-04-05
Published in Print: 2010-05-01

© 2010, Carl Hanser Publisher, Munich

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