How to formulate coatings with barrier properties?

Beyond the physical barrier against water, oxygen, carbon dioxide, and electrolytes, they can contribute (to some extent) towards:

• Resistance to corrosive chemicals, heat and UV light
• Quick drying times
• Dimensional stability
• Abrasion resistance
• Adhesion to variety of substrates

Image credits: Springer Nature^c

It’s good to assure you need some pre-requisites for maximum effectiveness: 

1. Moisture resistance:
   1. The coating must have a low permeability to water vapor. This means it should be difficult for water molecules to pass through the coating film
   2. The coating surface should be hydrophobic (water-repelling). This prevents water from accumulating on the surface and potentially weakening the film
2. Film integrity:
   1. The coating must be compatible with the substrate (the surface it's applied to). This ensures proper adhesion and prevents peeling or cracking
   2. The coating needs to cure properly to achieve optimal strength and adhesion