Related Experiment Video
Updated: Jun 26, 2025
06:21
A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles
Published on: March 13, 2017
10.4K
Polydopamine/SWCNT Ink Functionalization of Silk Fabric to Obtain Electroconductivity at a Low Percolation Threshold
Anna Baranowska-Korczyc1, Dorota Kowalczyk1, Małgorzata Cieślak1
1Łukasiewicz Research Network-Lodz Institute of Technology, Department of Chemical Textiles Technologies, 9/27 M. Skłodowskiej-Curie Street, 90-570 Lodz, Poland.
International Journal of Molecular Sciences
|May 11, 2024
Summary
This study coats silk fabric with polydopamine (PDA) and single-walled carbon nanotubes (SWCNTs) to create conductive textiles. The functionalized silk becomes hydrophilic and conductive, with significantly reduced resistance.
Area of Science:
- Materials Science
- Textile Engineering
- Nanotechnology
Background:
- Silk fibroin is a natural protein fiber with unique properties but lacks electrical conductivity.
- Developing conductive textiles is crucial for applications in wearable electronics and smart textiles.
- Polydopamine (PDA) is a versatile coating material known for its adhesive properties and ability to functionalize surfaces.
Purpose of the Study:
- To functionalize silk fabric with single-walled carbon nanotubes (SWCNTs) using a polydopamine (PDA) interlayer.
- To investigate the effect of SWCNT functionalization on the structural, thermal, surface, and electrical properties of silk fabric.
- To determine the percolation threshold for achieving electrical conductivity in the functionalized silk.
Main Methods:
- Silk fabric was coated with a thin polydopamine (PDA) layer via dopamine polymerization.
- The Silk/PDA fabric was subsequently functionalized with SWCNT ink using a dip-coating method.
- Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy, and electrical resistance measurements were employed for characterization.
Main Results:
- The β-sheet structure of silk fibroin remained largely unchanged, with a slight improvement in heat resistance.
- The functionalization process transformed the hydrophobic silk fabric into a hydrophilic material.
- Electrical conductivity was significantly enhanced, with volume resistance decreasing by nine orders of magnitude and surface resistance by seven orders of magnitude.
- Low percolation thresholds (0.05 wt.% for volume and 0.06 wt.% for surface resistance) were achieved, indicating efficient SWCNT network formation.
Conclusions:
- Polydopamine serves as an effective linker for SWCNT functionalization on silk fabric.
- SWCNT-functionalized silk exhibits enhanced electrical conductivity while preserving its structural integrity.
- This method offers a promising route for developing advanced conductive textiles for various technological applications.
