Record Details

Development of water-repellent organic-inorganic hybrid sol-gel coatings on aluminum using short chain perfluoro polymer emulsion

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Development of water-repellent organic-inorganic hybrid sol-gel coatings on aluminum using short chain perfluoro polymer emulsion
 
Creator WANKHEDE, RG
MOREY, S
KHANNA, AS
BIRBILIS, N
 
Subject Sol-gel
Fluoro
Hydrophobicity
Organic-inorganic
Corrosion resistance
FLUORINATED SILICA NANOPARTICLES
SOLUTION-IMMERSION PROCESS
SUPER-HYDROPHOBIC SURFACE
SUPERHYDROPHOBIC SURFACES
CORROSION PROTECTION
NANOCOMPOSITE COATINGS
FILMS
FABRICATION
ALLOY
INHIBITION
 
Description The development of an organic-inorganic sol-gel coating system (thickness similar to 2 mu m) on aluminum is reported. The coating uses glycidoxytrimethoxysilane (GPTMS) and methyltrimethoxysilane (MTMS) as silane precursors, crosslinked with hexamethylmethoxymelamine (HMMM) and followed by hydrophobic modification using a water base short chain per-fluoro emulsion (FE). Such coating resulted in enhanced hydrophobicity with a contact angle of about 120 degrees and sliding angle of 25 degrees for a 20 mu L water droplet. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements showed reduced corrosion upon coated substrates than the bare; correlated with both a higher degree of water repellency and formation of low permeable crosslinked sol-gel network. The structure of the coatings deposited was analyzed using Fourier transform infrared (FTIR) and X-ray photoelectron (XPS) spectroscopy, revealing replacement of hydrophillic surface hydroxyls groups with low energy per-fluoro groups. (C) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-14T12:45:07Z
2014-10-14T12:45:07Z
2013
 
Type Article
 
Identifier APPLIED SURFACE SCIENCE, 2831051-1059
http://dx.doi.org/10.1016/j.apsusc.2013.07.066
http://dspace.library.iitb.ac.in/jspui/handle/100/14438
 
Language en