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Preparation of Anionic Surfactant-Based One-Dimensional Nanostructured Polyaniline Fibers for Hydrogen Storage
Hatem A Al-Aoh1, Nacer Badi2,3, Aashis S Roy4
1Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia.
Polymers
|April 13, 2023
Summary
Polyaniline fibers exhibit enhanced conductivity and efficient hydrogen storage capabilities. These fibers demonstrate rapid adsorption and lower-temperature desorption, outperforming bulk polyaniline in hydrogen storage applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Polyaniline (PANI) is a conductive polymer with potential applications in energy storage.
- Controlling the morphology of polyaniline is crucial for optimizing its properties.
- One-dimensional nanostructures can offer improved performance characteristics.
Purpose of the Study:
- To synthesize one-dimensional polyaniline fibers using a surfactant-assisted method in an ice medium.
- To compare the structural, electrical, and hydrogen storage properties of polyaniline fibers with bulk polyaniline.
- To evaluate the potential of polyaniline fibers for hydrogen storage applications.
Main Methods:
- Anionic surfactant-assisted synthesis of polyaniline fibers in an ice medium.
- Preparation of bulk polyaniline at an optimum temperature for comparison.
- Structural characterization using Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD).
- Electrical conductivity measurements.
- Hydrogen storage capacity and kinetics assessment through adsorption-desorption cycles.
Main Results:
- Polyaniline fibers exhibited a one-dimensional nucleated structure.
- FTIR and XRD confirmed structural differences between the fibers and bulk polyaniline.
- Polyaniline fibers demonstrated significantly higher electrical conductivity compared to bulk polyaniline.
- Hydrogen storage measurements showed rapid adsorption (86% of 8-8.5 wt% in <9 min) by polyaniline fibers.
- Desorption occurred at lower temperatures, releasing ~1.5 wt% hydrogen at 1 bar.
Conclusions:
- The surfactant-assisted synthesis in an ice medium effectively produces one-dimensional polyaniline fibers.
- Polyaniline fibers possess superior electrical conductivity and enhanced hydrogen storage kinetics compared to bulk polyaniline.
- These findings highlight the potential of polyaniline fibers as advanced materials for efficient hydrogen storage systems.
