Naslov
The Influence of Solvent on Properties of Self- assembled Monolayers of Stearic Acid

Autori
Kristan Mioč, Ekatarina ; Hajdari, Zana ; Otmačić Ćurković, Helena ; Hosseinpour, Saman

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
67th Annual Meeting of the International Society of Electrochemistry, Book of Abstracts / - : International Society of Electrochemistry, 2016, 3-3

Skup
67th Annual Meeting of the International Society of Electrochemistry, Electrochemistry: from Sense to Sustainability

Mjesto i datum
Den Haag, Nizozemska, 21.08.2016. - 26.08.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
self-assembled monolayers ; long-chain organic acids ; seawater corrosion ; effect of solvents

Sažetak
Seawater is a corrosive medium that can cause a deterioration of metallic structures. They can be protected with corrosion inhibitors, however, they are often harmful chemical compounds. For this reason, there is a need to develop new, environmentally acceptable protection methods. The increase of corrosion resistance can be achieved by modification of metal surface with thin, well-ordered films of long-chain carboxylic acids, so-called self- assembled monolayers, which are environmentally and economically acceptable. In order to achieve efficient corrosion protection, self- assembled monolayer should be dense, well ordered and defect free to act as an efficient barrier against aggressive ion diffusion towards metal surface. Furthermore, they should be strongly bound to surface in order to prevent metal dissolution when exposed to aggressive medium. The structure, stability and number of defects in the final monolayer formed on metal surface strongly depend on the nature of the solvent used. The solvent parameters, such as dielectric constant and interaction ability, are important factors that affect the quality of monolayer. According to literature1 the higher the dielectric constant of solvent from which the monolayer is assembled, the lower surface density of molecules, the greater number of defects, and the less robust SAMs will be formed. But on the other hand, it is important that solvent must not complex with a surface.1 The purpose of this study was to examine how solvents with different dielectric constants affect the adsorption and the quality of monolayer assembled on metal surface. The adsorption of stearic acid on copper and stainless steel from different solvents was monitored by Quartz crystal microbalance (QCM) technique. The protective properties of monolayers formed from different solvents were examined in artificial seawater by electrochemical polarization methods and electrochemical impedance spectroscopy, while the structure of the film was determined by contact angle measurements and Sum Frequency Generation (SFG). Acknowledgments: The research leading to these results has received funding from Croatian Science Foundation under grant agreement 9.01/253. The financial support of German Academic Exchange Service and Croatian ministry of science, education and sports is gratefully acknowledged. Literature: 1. X. Chen, E. Luais, N. Darwish, S. Ciampi, P. Thoardson and J. J. Gooding, Langmuir, 2012, 28, 9487-9495

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA