Flexible Perfluoropolyethers-Functionalized CNTs-Based UHMWPE Composites: A Study on Hydrogen Evolution, Conductivity...

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Ultra-high molecular weight polyethylene (UHMWPE) is a versatile polymer.
• Improving the electrical conductivity of polymer composites is crucial for advanced applications.
• Carbon nanotubes (CNTs) are effective conductive fillers but require surface modification for optimal dispersion.

Purpose of the Study:

• To develop flexible conductive composites using UHMWPE and perfluoropolyether (PFPE)-modified CNTs.
• To investigate the effect of PFPE functionalization on CNT dispersion and composite conductivity.
• To explore the potential of these composites in fuel cell and hydrogen storage technologies.

Main Methods:

• Production of UHMWPE/PFPE-modified CNT composites at varying PFPE:CNT ratios.
• Electrical conductivity measurements of the prepared nanocomposites.
• Electrochemical atomic force microscopy (EC-AFM) coupled with cyclic voltammetry (CV) for morphological analysis.

Main Results:

• PFPE modification significantly improved CNT dispersion in the UHMWPE matrix.
• Electrical conductivity increased by two to five orders of magnitude compared to composites with pristine CNTs.
• Reduced overpotential for hydrogen oxidation peaks and observed hydrogen production suggest suitability for electrochemical applications.

Conclusions:

• PFPE functionalization is an effective strategy to enhance the electrical properties of UHMWPE/CNT composites.
• The developed composites demonstrate potential for use in energy conversion and storage devices.
• Further research into PFPE-modified CNTs can lead to next-generation conductive materials.