Created with Sketch.

26. Feb 2019 | Application Areas

Interaction of fumed silica with epoxy resin

Researchers recently investigated the chemical interaction of fumed silica of different sizes with epoxy via ultrasonication for improved coating.

White powder in a glass bowl.

The study reveals that nano-silica shows more participation in chemical bonding to epoxy than micro-silica. Source: Coprid –

Blank epoxy coating (EC) and fumed silica epoxy composite coatings (SECCs) reinforced with different loading levels of nano- (7 nm) and micro (0.2-0.3 μm) silica were successfully prepared using ultrasonic technique. SEM analysis revealed a uniform dispersion of nano- and micro-silica fillers in the epoxy matrix up to 3 wt.% loading. It is found that ultrasonication results in permanent chemical bonding between epoxy resin and silica particles as investigated by FT-IR spectroscopy and DSC. Quantitative FTIR generally reveals that nano-silica shows more participation in chemical bonding to epoxy than micro-silica.

Use of nano-silica leads to improved corrosion resistance

Coated steel panels with either EC or SECCs were evaluated with regard to surface wettability, corrosion resistance, thermal stability and mechanical properties. Micro-silica treated coatings show enhanced hydrophobicity in contrast to nano-silica samples as revealed by contact angle measurements. Results of salt spray test and thermogravimetric analysis indicate that the addition of nano-silica show improved corrosion resistance and thermal stability of the epoxy coating compared to micro-silica. The mechanical properties namely scratch hardness, adhesion, impact strength and abrasion resistance were also improved in the same manner.

The study is published in: Progress in Organic Coatings Volume 129, April 2019, Pages 1-9.

EC Library Sol Gel Technology in Praxis


Sol-Gel-Technology in Praxis

Finally! A book on the topic of sol gels that focuses on practical application - designed to fit the needs of hands-on-beginners who want to develop a basic understanding of sol-gel- and nano-technology as well as to meet the requirements of advanced formulators seeking a practical guide that will lead them straight into implementable solutions. With 61 real-life examples drawn from patent literature and accompanying explanations and interpretations, knowledge can be gained quickly and immediately translated into concrete solutions.


This could also be interesting for you!


You are currently not logged in

To leave a comment, please log in.

For continuously improving and optimizing our websites, we use cookies. By using our website, you agree to the usage of cookies. For more information, please visit our Privacy policy.