Biocompatible Conductive Polymers with High Conductivity and High Stretchability.

Area of Science:

• Materials Science
• Polymer Science
• Electronics Engineering

Background:

• Stretchable electronic materials are crucial for bioelectronics, wearable devices, and soft robotics.
• Stretchable electrodes are key components in these systems.
• Intrinsically conductive polymers like PEDOT:PSS offer flexibility and biocompatibility but require enhanced conductivity and stretchability.

Purpose of the Study:

• To improve the electrical conductivity and mechanical stretchability of PEDOT:PSS for advanced electrode applications.
• To investigate the role of d-sorbitol as a secondary dopant and plasticizer.

Main Methods:

• Incorporation of biocompatible d-sorbitol into PEDOT:PSS.
• Characterization of electrical conductivity and mechanical stretchability of the modified polymer.
• Analysis of the mechanism behind stretchability enhancement.

Main Results:

• Achieved high conductivity (>1000 S/cm) in d-sorbitol-PEDOT:PSS (s-PEDOT:PSS).
• Maintained conductivity at strains up to 60% with stable resistance during stretching cycles.
• Demonstrated that d-sorbitol softens PSSH chains by disrupting hydrogen bonds, enhancing flexibility.

Conclusions:

• D-sorbitol significantly enhances both conductivity and stretchability of PEDOT:PSS.
• The developed s-PEDOT:PSS exhibits the highest conductivity among biocompatible intrinsically conductive polymers with high stretchability.
• This material holds great promise for next-generation stretchable electronic devices.