Chemical-free laser-processed superhydrophobic coatings for food packaging

Overview

This technology applies a chemical-free, cost-effective laser surface processing method to create superhydrophobic coatings on food packaging containers. When applied to surfaces that contact aqueous food products, the coating traps a thin film of air that acts as a barrier between the liquid and the container wall. This barrier reduces liquid-solid interaction and adhesion, decreasing food retention and waste while enabling self-cleaning, anti-corrosion, and anti-bacterial properties. The result is packaging that supports greater reusability without compromising food quality.

The approach is particularly relevant for manufacturers and brand owners seeking sustainable packaging alternatives that reduce product loss, extend container lifecycle, and eliminate the need for chemical coatings or additives that could migrate into food.

Technical specifications

How it works:

• A direct laser surface processing technique modifies the topography of the container material at micro- and nano-scale, creating a surface structure that repels water and aqueous solutions
• The engineered surface traps a stable layer of air, forming a physical barrier between the food product and the container
• No chemical coatings, surfactants, or additives are required, preserving food quality and safety

Key features and benefits:

• Chemical-free process eliminates concerns about coating migration into food
• Self-cleaning behavior reduces residue buildup and cleaning effort
• Anti-corrosion protection extends container service life
• Anti-bacterial functionality supports hygiene during reuse
• Reduced liquid retention minimizes food waste and product loss
• Cost-effective laser processing suitable for scalable manufacturing

Applications:

• Reusable aqueous food containers and bottles
• Food packaging surfaces requiring reduced liquid adhesion
• Containers for liquid dairy, sauces, beverages, and other water-based products

Technology readiness level

The underlying wetting engineering surface technology has been extensively validated through more than 100 peer-reviewed scientific publications. The work has received significant international media coverage, including four features in the New York Times and coverage in documentaries by PBS and Fox Channels, indicating broad technical recognition. Future validation will focus on optimizing the superhydrophobic surface parameters for specific aqueous food products and container geometries to achieve minimum interaction and liquid retention while preserving food quality. The technology is positioned for partnership-driven application development and pilot trials with food packaging manufacturers.