What makes sol-gel coatings different from traditional nonstick coatings?

Traditionally, most nonstick coating companies have formulated non-reactive systems. (As formulators, any chemical reaction occurring within the formulations is undesirable, since it could change the quality and performance of the ultimate coating.) The formulators receive pre-polymerized materials from their suppliers and blend them so they are suitable for application as coatings.

With sol-gel, the process is the opposite: the formulators start with the monomers and create the polymer on the pan’s surface once the coating is applied by means of a chemical reaction.

As discussed in the PKN section, “What is a nonstick coating?”, there are five basic elements that make up a liquid coating before it is applied:

  1. The binder (or resin) adheres to the surface of the pan. It acts as the “glue”, providing adhesion and cohesion. It also determines the fundamental properties of the coating.
  2. The pigment provides the color.
  3. The “nonstick” component provides the release.
  4. The reinforcing agents add strength and wear resistance.
  5. The carrier (water or solvent), in which the other materials are suspended, which evaporates when the coating is cured.

With sol-gel technology, the binder is synthesized during the curing stage. It provides a hard surface, similar to porcelain enamel, and is formulated in a way that allows good release without the use of fluoropolymers (e.g, PTFE).

 
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Sol-Gel Ceramic Coatings

What makes sol-gel coatings different from traditional nonstick coatings?

Traditionally, most nonstick coating companies have formulated non-reactive systems. (As formulators, any chemical reaction occurring within the formulations is undesirable, since it could change the quality and performance of the ultimate coating.) The formulators receive pre-polymerized materials from their suppliers and blend them so they are suitable for application as coatings.

With sol-gel, the process is the opposite: the formulators start with the monomers and create the polymer on the pan’s surface once the coating is applied by means of a chemical reaction.

As discussed in the PKN section, “What is a nonstick coating?”, there are five basic elements that make up a liquid coating before it is applied:

  1. The binder (or resin) adheres to the surface of the pan. It acts as the “glue”, providing adhesion and cohesion. It also determines the fundamental properties of the coating.
  2. The pigment provides the color.
  3. The “nonstick” component provides the release.
  4. The reinforcing agents add strength and wear resistance.
  5. The carrier (water or solvent), in which the other materials are suspended, which evaporates when the coating is cured.

With sol-gel technology, the binder is synthesized during the curing stage. It provides a hard surface, similar to porcelain enamel, and is formulated in a way that allows good release without the use of fluoropolymers (e.g, PTFE).

 

 
 
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