Bhagyalaxmi Gullola

Improve bonding between ceramic fillers and bio epoxy resin is carried out by hardeners with good mixing before curing. Sometimes it is an art. The most universal and popular hardeners that work equally well with most resins are PEPA (polyethylene polyamine), TETA (triethylenetetramine) and Etal-45M. Please note that for decorative products, special resins and hardeners are used (for example, Etal-Optic), which have high fluidity (this is important for removing bubbles after casting) and high optical transparency.

Treat the ceramic fillers with triethoxy amino silane. ethoxy silane will anchor on ceramic powder and the free amino group will react with epoxy resin. The interface will be excellent.

Reduce the ceramic filler moisture to the nearest minimal and treated with acetone. These will help to remove water molecules that may serve as barrier between the filler and epoxy and also prepare the surface for proper adhesion respectfully.

Wasiu Oyeyemi Salami , Yuri Mirgorod , Asit Baran Samui thank you for your response. I will take notes of it.

Check out the website of BYK, a company offering modifiers for the paint and varnish industry. They should have substances that improve the wettability of pigments and fillers.

stefan krakowiak

with the help of chemical treatment we can improve the bonding behavior (wettability) for ceramic fillers.

The bonding between filler and epoxy plays a vital role in determining the strength and performance of composite materials. This bond can occur through mechanical interlocking, chemical bonding, hydrogen bonding, or van der Waals forces. Stronger bonds, especially chemical ones, ensure effective stress transfer and durability. Surface treatments or coupling agents, such as silanes, are often used to enhance compatibility and adhesion between the filler and the epoxy matrix. Proper dispersion of the filler also helps maximize bonding efficiency and overall composite quality.