Created with Sketch.

17. Sep 2018 | Coatings Technologies

Multifunctional coatings based on silicone matrix and propolis extract

In a new work, the multifunctional effect of propolis within a silicone matrix coating was evaluated.

The researchers were able to show that the presence of propolis increased the anticorrosive properties of the paint. Source: mel_gama / Pixabay.

The development of new green alternatives for anticorrosive and antifouling coatings is essential for the conservation of the environment. A coating with more than one functionality, for example both anticorrosion and antifouling is of great interest for cost reduction and for improved coating efficiency.

Increase of thermal stability

Fourier transform infrared (FTIR) and 13C nuclear magnetic resonance (13C NMR) analyses confirmed the presence of several compounds with active properties (e.g. polyphenols, cinnamic acid, ferulic acid, and diterpenes). The addition of propolis and TiO2 increased the thermal stability of the final coating while keeping the water contact angle of the silicone, near to 98°.

Antifouling efficiency over a longer period of time

Electrochemical impedance spectroscopy (EIS) experiments showed that the presence of propolis increased the anticorrosive properties, and bacterial experiments showed decreased adhesion of the gram-positive bacteria Staphylococcus aureus (ATCC 6538). Marine experiments also showed the excellent antifouling efficiency of the paint containing propolis over eleven months. The use of a natural pigment allied to a solvent free resin contributes to the formulation of more environmentally friendly paints.

The study is published in: Progress in Organic Coatings Volume 123, October 2018, Pages 223-231.

Image source: Pixabay

EC Library Sol Gel Technology in Praxis

Books

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.

Tags

This could also be interesting for you!

0 Comments

You are currently not logged in

To leave a comment, please log in.

Login
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.
Accept