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Related Experiment Video

Updated: Oct 9, 2025

Laser Micromachining for Polymer Surface Topography Design

Laser Micromachining for Polymer Surface Topography Design

Published on: September 19, 2025

Adhesive Joints with Laser Shaped Surface Microstructures.

Szymon Tofil¹, Robert Barbucha², Marek Kocik²

¹Laser Research Centre, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Av. Tysiąclecia P.P. 7, 25-314 Kielce, Poland.

Materials (Basel, Switzerland)

|December 24, 2021

Summary

Laser surface microstructuring enhances adhesive joints between aluminum and plastics. This method significantly increases shear strength up to 376% without thermal damage or affecting material wetting.

Keywords:

UV laser adhesive joints laser cold ablation laser micromachining microstructure modification of the surface layer picosecond laser devices plastics surface micromachining

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Area of Science:

Materials Science
Surface Engineering
Adhesion Science

Background:

Adhesive joining is crucial for dissimilar materials across industries.
Lightweight metals like aluminum and plastics require robust joining methods.
Improving the shear strength of adhesive joints is a key engineering challenge.

Purpose of the Study:

To present a laser surface microstructuring method for enhancing adhesive joints.
To investigate the effect of microstructuring on the shear strength of aluminum-plastic joints.
To evaluate the impact of laser treatment on material wetting properties.

Main Methods:

Picosecond UV laser surface microstructuring (TruMicro 5325c) was applied to aluminum and plastic.
Cold ablation phenomenon was utilized for material removal.
Microscopic examination, contact angle, and surface energy measurements were performed.
Shear strength tests were conducted on adhesive joints.

Main Results:

Laser microstructuring increased the active surface area, enhancing adhesive strength.
No thermal damage or negative impact on material wetting was observed.
Shear strength of microstructured joints increased by up to 376% compared to untreated joints.

Conclusions:

Laser surface microstructuring is an effective method for improving adhesive joint strength.
The technique offers a significant increase in shear strength for aluminum-plastic composites.
Further research will optimize laser parameters for specific microstructure geometries.