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Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release

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Adhesives with Debonding-On-Demand Capability: Leveraging Responsive Microcapsules for Mechanically-Induced

Claas-Hendrik Stamp¹, Jana Stumpp¹, Céline Calvino^1,2

¹Cluster of Excellence livMatS, Albert Ludwig University of Freiburg (livMatS), FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, Georges-Köhler-Allee 105, D-79110, Freiburg, Germany.

Advanced Materials (Deerfield Beach, Fla.)

|March 3, 2025

Summary

Researchers developed a new temporary adhesive using microcapsules for easy, on-demand debonding. This sustainable material aids component recovery and recycling by enabling controlled adhesive release under compression.

Keywords:

adhesive composites debonding‐on‐demand mechanical compression microcapsules plasticizers

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Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices

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Published on: January 17, 2017

Area of Science:

Materials Science
Polymer Chemistry
Sustainable Engineering

Background:

Temporary adhesives are crucial for sustainable manufacturing, enabling component recovery and recycling.
Existing adhesives often lack controlled reversibility, hindering efficient material reuse.
Developing adhesives with on-demand debonding capabilities is essential for advanced recycling processes.

Purpose of the Study:

To design and parameterize a novel temporary adhesive with mechanically induced debonding-on-demand.
To create a responsive adhesive composite by incorporating microcapsules into a commercial adhesive.
To investigate the effects of microcapsule concentration and compression force on adhesive performance and debonding.

Main Methods:

Incorporation of hexyl acetate-filled microcapsules into polyvinyl acetate adhesive.
Controlled compression testing to induce microcapsule rupture and adhesive plasticization.
Adhesion strength, toughness, thermal stability, and creep rate measurements.

Main Results:

The responsive adhesive composite demonstrated stable mechanical performance across varying microcapsule concentrations.
Optimal plasticization was achieved at 50 wt.% microcapsule concentration, with maximum capsule rupture at 5 kN compression.
Debonding-on-demand was achieved, evidenced by a 1200% increase in creep rates compared to neat adhesive specimens.

Conclusions:

The developed microcapsule-filled adhesive offers a simple, versatile approach for on-demand debonding.
This technology advances the development of sustainable adhesives for improved recycling and component recovery.
The framework provides a pathway for designing functional, responsive adhesive materials.