Enhanced Adhesion of Polydimethylsiloxane Using an Interlocked Finger Structure.

Area of Science:

• Materials Science
• Polymer Chemistry
• Surface Engineering

Background:

• Silicone-based polymers exhibit low surface energies, leading to poor adhesion in various applications.
• This limitation hinders their performance and widespread use in demanding environments.

Purpose of the Study:

• To develop a novel technique for significantly improving the adhesion of silicone-based polymers.
• To investigate the efficacy of an interlocked finger structure for enhancing polymer adhesion.

Main Methods:

• Fabrication of an interlocked finger structure via surface-confined dissolution and directional melt crystallization of a solvent.
• Creation of porous surfaces from polyurethane, polyvinyl alcohol, and polystyrene.
• Integration of these porous surfaces with polydimethylsiloxane to form interlocked interfaces.

Main Results:

• Achieved up to 24.8-fold increase in adhesion compared to untreated samples.
• Demonstrated a 7.3-fold increase in adhesion compared to conventional plasma-treated samples.
• Adhesion strength showed a linear dependence on the pore depth of the prepared surfaces.

Conclusions:

• The novel interlocked finger structure effectively enhances the adhesion of silicone-based polymers.
• This technique offers a promising solution for overcoming poor adhesion challenges in polymer applications.
• The findings suggest potential for improved performance in diverse material applications requiring strong polymer interfaces.