Local Controllable Laser Patterning of Polymers Induced by Graphene Material

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Graphene is a novel carbon material with unique optical and thermal properties.
• Laser patterning is a key technique for polymer surface modification.
• Efficient absorbers are needed for high-resolution laser patterning of polymers.

Purpose of the Study:

• To investigate the effectiveness of graphene as an absorber for polymer laser patterning.
• To characterize the laser-induced changes in polymer materials containing graphene.
• To explore the potential of graphene in advanced polymer fabrication.

Main Methods:

• Mechanical exfoliation of graphene.
• Incorporation of 0.005 wt % graphene into polymer materials.
• Near-infrared (NIR) pulsed laser irradiation.
• Optical microscopy for pattern visualization.
• X-ray photoelectron spectroscopy (XPS) for surface analysis.
• Raman depth imaging for carbon characterization.

Main Results:

• Graphene significantly enhances NIR pulsed laser patterning of polymers at low concentrations (50 ppm).
• Laser irradiation causes local polymer surface discoloration and carbonization due to graphene's photothermal effect.
• Discoloration depth ranges from 221-348 μm.
• Raman spectroscopy reveals amorphous and complex sp/sp² carbon structures in the patterned areas.

Conclusions:

• Graphene is a highly effective additive for achieving precise laser patterning of polymers using NIR pulsed lasers.
• The photothermal conversion capacity of graphene drives polymer carbonization, enabling pattern formation.
• This research provides a guideline for graphene-based polymer laser patterning and highlights its practical application potential.