Study of Underwater Contact Angles for Formulation of Fatliquoring Emulsions Using Green Surfactants

Anik Goswami; Sunil S. Bhagwat

doi:10.3139/113.110372

Article

Study of Underwater Contact Angles for Formulation of Fatliquoring Emulsions Using Green Surfactants

Anik Goswami and Sunil S. Bhagwat

Published/Copyright: May 13, 2015

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From the journal Tenside Surfactants Detergents Volume 52 Issue 3

Abstract

Contact angles of pure water, partially sulphated groundnut oil and different surfactant solutions on glass, Stainless Steel, Teflon and different other polymer surfaces have been measured. The contact angles of oil on various surfaces underwater and under different surfactant solutions were also measured. These two contact angles have been found to be linearly related with a slope close to 1. However, the underwater contact angles have been found to deviate significantly from the prediction based on Young's equations which have been attributed to the possible modifications of the surfaces underwater due to adsorption of surfactants. Based on the observed oil underwater contact angles, comparative efficiencies of fatliquoring have been obtained. Weight gain measurements in various fatliquoring solutions containing surfactants and oil have been carried out with the wet blue leather samples. The results show that the contact angle of oil underwater correlates well with the efficiency of leather wetting.

Kurzfassung

Es wurden die Kontaktwinkel von reinem Wasser, partiell sulfatiertem Erdnussöl und verschiedenen Tensidlösungen auf Glas, rostfreiem Stahl, Teflon und verschiedenen anderen Polymeroberflächen gemessen. Die Kontaktwinkel von Öl an verschieden Unterwasserflächen und unter verschiedenen Tensidlösungen wurde ebenfalls gemessen. Diese beiden Kontaktwinkel sind nahezu linear zueinander; die Steigung liegt in der Nähe von 1. Dennoch weichen die Unterwasserkontaktwinkel signifikant von der Young-Gleichung ab. Dies kann auf die möglichen Veränderungen der Unterwasseroberflächen aufgrund der Tensidadsorption zurückgeführt werden. Basierend auf die Unterwasserkontaktwinkel des Öls wurden relative Effizienzen der Fettung erhalten. Messungen der Gewichtszunahme in verschiedenen tensid-und ölhaltigen Fettungslösungen wurden an nassen blauen Lederproben durchgeführt. Die Ergebnisse zeigen, dass der Unterwasserkontaktwinkel von Öl sehr gut mit der Effizienz der Lederbenetzung korreliert.

Key words: Underwater contact angle; Young's approach; Girifalco's approach; Fatliquoring; fatty alcohol ethoxylates

Stichwörter: Unterwasserkontaktwinkel; Youngs-Ansatz; Girifalcos-Ansatz; Entfettung; Fettalkoholethoxylate

* Correspondence address, Dr. S. S. Bhagwat, Institute of Chemical Technology, Chemical Engineering Department, Mumbai-400019, India, Tel.: +91-22-3361-2001/2101, E-Mail: ss.bhagwat@ictmumbai.edu.in

Professor Dr. Sunil S. Bhagwat was born in October 1963. He completed his graduation in chemical engineering in 1984, master of chemical engineering in 1986 and PhD in 1989. He currently works as Professor and Head of Chemical Engineering Department in the Institute of Chemical Technology, Mumbai, India. His research interest includes Interfacial Science and Engineering, Exergy Engineering.

Dr. Anik Goswami was born in June 1986, in Mumbai. He completed his graduation in Chemistry from Ram Narain Ruia College, Mumbai in 2006. He continued his Master of Chemistry in Ram Narain Ruia College, Mumbai and got the MSc Chemistry in 2008. He then secured admission in the Institute of Chemical Technology for his doctoral research under Professor Dr Sunil S. Bhagwat. He completed his PhD Chemistry in 2014. His area of study mainly centered on surfactants. He currently works as Post-Doctoral research fellow in the cosmetics department of the Himalaya drug company, Bangalore.

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Received: 2014-04-09

Accepted: 2015-01-08

Published Online: 2015-05-13

Published in Print: 2015-05-15

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https://doi.org/10.3139/113.110372

Keywords for this article

Underwater contact angle; Young's approach; Girifalco's approach; Fatliquoring; fatty alcohol ethoxylates