Open AccessCoatings and Aerogels Based on Sol-Gel Processes
Author(s) -
K. Siegmann,
Martina Hirayama
Publication year - 2008
Publication title -
chimia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.387
H-Index - 55
eISSN - 2673-2424
pISSN - 0009-4293
DOI - 10.2533/chimia.2008.815
Subject(s) - silanes , materials science , azobenzene , wetting , adhesive , sol gel , coating , polymer , ethylene glycol , aerogel , surface modification , chemical engineering , nanotechnology , silane , composite material , layer (electronics) , engineering
This article summarizes applications of sol-gel coatings to modify surface properties, and the process is illustrated with several examples. The use of azobenzene-modified silanes leads to a photoswitchable coating displaying light-controlled wettability. Silane coupling reactions are used to coat surfaces with polymers, in order to hinder the ice crystal growth on surfaces. Liquid-like coatings based on poly(ethylene glycol) show anti-adhesive properties to lime. The preparation of aerogels could be improved by selecting proper silanes as coupling agents to the inner surface of the pores. These examples illustrate that sol-gel processes based on silianation reactons are most promising for industrial applications.