Advertisements

Epoxy/modified nanosilica/perfluorooctyl triethoxysilane as anti-corrosive and self-healing hybrid nanocomposite

Self-healing hybrid nanocomposite was successfully prepared from epoxy resin containing self-healing microcapsules and organosilane modified nanosilica to enhance the anticorrosion performance of an epoxy coating. Nanosilica surface was modified with (3-glycidoxypropyl)trimethoxysilane (GPTMS) and (3-aminopropyl)trimethoxysilane (APTES) to accomplish well dispersion in the polymer matrix. Perfluorooctyl triethoxysilane (POT), ethanolamine (ETA), and diethanolamine (DEA) as self-healing agents were encapsulated by polymer shell and incorporated into the epoxy coating along with modified nanosilica to form anticorrosion barrier of organic and inorganic coating on a cold-rolled steel surface (CRS). The results revealed that the self-healing hybrid nanocomposite containing 3 wt% of GPTMS-modified silica (GMS) and 10 wt%POT microcapsules possessed the best corrosion performance with the corrosion rate of 0.09 mm/year (Icorr of 0.01 mA/cm2), corrosion rating number of 9 and oxygen permeability about 0.14 barrer. The addition of modified silica (GMS) and self-healing agent microcapsules (POT) effectively increased the length of the diffusion pathways, as well as decreased the O2 permeability of the nanocomposite film.

Read more

Volume 104, March 2017, Pages 173–179

 

Advertisements

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

SUBSCRIBE TO OUR NEWSLETTER

You have successfully subscribed to the newsletter

There was an error while trying to send your request. Please try again.

Paints and Coatings Expert will use the information you provide on this form to be in touch with you and to provide updates and marketing.
%d bloggers like this: