Lipoic Acid-Derived Bioadhesive Prepared from Rapid Molecular Aggregation

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomaterials

Background:

• Alpha-Lipoic acid (LA) based adhesives show promise but face challenges with conditional dependency and long polymerization times.
• Existing methods require heating and extended cycles, limiting practical applications.

Purpose of the Study:

• To develop a rapid, room-temperature method for preparing high-performance adhesives using supramolecular interactions of alpha-Lipoic acid (LA) and its derivatives.
• To investigate the influence of molecular structure and metal ion chelation on adhesive properties.
• To demonstrate a strategy for creating adhesive patches from non-adhesive materials.

Main Methods:

• Utilized supramolecular interactions between alpha-Lipoic acid (LA) and amino-modified LA-derivatives in aqueous solutions.
• Investigated the effect of molecular structure and metal ion chelation on adhesive performance.
• Developed a "Parasitism" strategy to integrate LA/LA-derivative interactions into polymer porous scaffolds for adhesive patch fabrication.

Main Results:

• Rapid aggregation of LA and LA-derivatives in water formed adhesives with strong interfacial, underwater, and wet adhesion.
• Adhesion performance was significantly influenced by the molecular structure of LA-derivatives and metal ion chelation.
• The "Parasitism" strategy successfully endowed non-adhesive materials with tissue adhesion capabilities.

Conclusions:

• Supramolecular interactions offer a facile, universal, and scalable method for preparing advanced LA-based adhesives at room temperature.
• This approach simplifies the creation of tissue-adhesive materials without complex chemical modifications.
• The developed adhesives demonstrate potential for diverse applications requiring strong and reliable adhesion in wet environments.