Anti-Adhesive Organosilane Coating Comprising Visibility on Demand

Area of Science:

• Materials Science
• Surface Chemistry
• Polymer Engineering

Background:

• Anti-adhesive and hydrophobic coatings have diverse applications, including self-cleaning, anti-graffiti, and release coatings.
• Current organosilane coatings, while effective, lack a simple method for monitoring application and wear.
• There is a need for functional coatings with controllable visibility to ensure proper application and durability.

Purpose of the Study:

• To develop an anti-adhesive organosilane coating with a visibility-on-demand property.
• To incorporate a fluorescent marker molecule, 1,8-naphthalimide-N-propyltriethoxysilane (NIPTES), into existing anti-adhesive coatings.
• To enable straightforward monitoring of coating application and wear.

Main Methods:

• Incorporation of NIPTES into an established anti-adhesive organosilane coating formulation.
• Characterization using contact angle measurements, atomic force microscopy (AFM), FTIR, UV-Vis, fluorescence, and X-ray photoelectron spectroscopy (XPS).
• Evaluation of the on-demand control function during an injection molding process.

Main Results:

• Successful integration of NIPTES into the organosilane coating, providing blue fluorescence under UV light.
• Demonstrated covalent coupling of NIPTES via hydrolysis and condensation reactions.
• Verified the ability to visually assess coating homogeneity and wear through fluorescence.

Conclusions:

• The addition of NIPTES offers a simple method to impart fluorescence to anti-adhesive coatings without altering deposition procedures.
• The fluorescent marker enables on-demand control and monitoring of coating application and performance.
• This innovation enhances the practical utility of anti-adhesive coatings in industrial processes like injection molding.