A Mussel-Inspired Bio-Based Dipping System with Superior Interfacial Anti-Fatigue Adhesion

Area of Science:

• Materials Science
• Polymer Chemistry
• Sustainable Engineering

Background:

• Traditional resorcinol-formaldehyde-latex (RFL) dipping enhances fiber-rubber composite reliability but faces toxicity regulations.
• Existing alternatives often rely on unsustainable petroleum-based resins.
• There is a critical need for eco-friendly and high-performance interfacial treatments.

Purpose of the Study:

• To develop a novel, sustainable, bio-based dipping system as a replacement for RFL.
• To engineer a robust interfacial layer with improved mechanical properties and thermal stability.
• To validate the enhanced interfacial reliability and fatigue resistance of the bio-based system.

Main Methods:

• Incorporation of a dopamine-like structure into a bio-based phenolic resin formulation.
• Optimization of resin formulation for a stable dipping layer and robust network formation.
• Covulcanization at the fiber-rubber interface to ensure strong interfacial bonding.

Main Results:

• The bio-based system forms an interfacial layer with strength comparable to RFL, improved toughness, and reduced heat buildup.
• Static adhesion achieved is comparable to RFL.
• Interfacial fatigue resistance was enhanced by up to 49% compared to RFL.

Conclusions:

• The developed bio-based dipping system is a sustainable and effective substitute for RFL in fiber-rubber composites.
• The system offers superior interfacial fatigue resistance and comparable static adhesion to RFL.
• This approach presents a promising solution for environmentally friendly, high-performance industrial applications.