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PVC/CNT Electrospun Composites: Morphology and Thermal and Impedance Behavior
Marcio Briesemeister1, John A Gómez-Sánchez2, Pedro Bertemes-Filho3
1Department of Materials Science and Engineering, Santa Catarina State University, Joinville 89219-710, Brazil.
Polymers
|October 26, 2024
Summary
This study enhanced polyvinyl chloride (PVC) membranes with carbon nanotubes (CNTs) for sensor applications. The composite membranes showed significant impedance changes in wet conditions, making them promising for sensor development.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Polyvinyl chloride (PVC) electrospun membranes offer mechanical robustness and chemical resistance for sensor applications.
- Improving the electrical characteristics of these membranes is crucial for advanced sensor development.
Purpose of the Study:
- To investigate the effects of adding carbon nanotubes (CNTs) to PVC electrospun membranes.
- To analyze the impact on morphology, thermal properties, and impedance behavior for potential sensor applications.
Main Methods:
- Fabrication of PVC and PVC/CNT electrospun membranes.
- Characterization using Transmission Electron Microscopy (TEM) and Field-Emission Scanning Electron Microscopy (FESEM).
- Thermal analysis (Differential Scanning Calorimetry) and electrical impedance spectroscopy.
Main Results:
- CNTs were encapsulated within PVC fibers, maintaining uniform fiber morphology.
- Addition of CNTs lowered the glass transition temperature and altered PVC degradation.
- Dry membranes showed increased electrical resistance, while wet membranes exhibited significantly decreased resistance (RCT).
Conclusions:
- PVC/CNT composite membranes demonstrate significant impedance variations between dry and wet states.
- These tunable electrical properties are highly relevant for developing novel PVC-based composite sensors.
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