Surface silverized meta-aramid fibers prepared by bio-inspired poly(dopamine) functionalization

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Polymetaphenylene isophthamide (PMIA) fibers are known for their thermal stability but lack electrical conductivity.
• Developing conductive fibers is crucial for applications in flexible electronics and smart textiles.
• Existing methods for creating conductive fibers can be complex or costly.

Purpose of the Study:

• To develop a facile and effective method for fabricating highly electrically conductive aramid fibers.
• To immobilize silver nanoparticles onto the surface of PMIA fibers.
• To characterize the properties and stability of the resulting silver-coated fibers.

Main Methods:

• Functionalization of PMIA fibers with poly(dopamine) (PDA) via dipping in an alkaline dopamine solution.
• Electroless silver plating using glucose as a reducing agent to form silver nanoparticles on the PDA layer.
• Characterization using XPS, EDS, XRD, SEM, and a four-point probe resistivity meter.

Main Results:

• A homogeneous and compact silver layer was successfully deposited on the PMIA fiber surface.
• The electrical resistivity of the silver-coated PMIA fibers was as low as 0.61 mΩ·cm.
• The silver content was controllable, and the fibers exhibited satisfactory stability after ultrasonic treatment.

Conclusions:

• The developed method provides a facile route to highly electrically conductive aramid fibers.
• The poly(dopamine) layer effectively anchors silver nanoparticles, enhancing conductivity.
• These conductive PMIA fibers show potential for various advanced applications requiring electrical properties.