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Laser Micromachining for Polymer Surface Topography Design

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Reinforced Smart Foams Produced with Time-Profiled Magnetic Fields.

Daniele Davino¹, Marco D'Auria^1,2,3, Roberto Pantani⁴

¹Dipartimento di Ingegneria, Università degli Studi del Sannio, Piazza Roma 21-24, 82100 Benevento, Italy.

|December 30, 2020

Summary

Researchers developed a new method using time-profiled magnetic fields to control magnetic particle alignment in smart foams. This enhances their magnetic field sensitivity and stress response for advanced material applications.

Keywords:

magnetic particles magnetoelasticity smart foams variable magnetic field

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Area of Science:

Materials Science
Polymer Science
Magnetism

Background:

Polymeric smart foams are porous materials containing magnetic particles, exhibiting magnetic field sensitivity.
Existing methods use constant magnetic fields to align particles during foam formation.
Particle alignment influences the magnetoelastic properties of these smart materials.

Purpose of the Study:

To develop a novel field-structuring process using time-profiled magnetic fields.
To control the geometrical features of magnetic particle aggregates within smart foams.
To investigate the impact of magnetic field parameters on magnetoelastic behavior.

Main Methods:

Development of a new foaming process utilizing a time-profiled magnetic field.
Investigation of magnetic field strength and switching times effects.
Analysis of particle aggregate geometry and its influence on material properties.

Main Results:

A new field-structuring process was successfully developed.
The alignment of magnetic particles enhances relative sensitivity to magnetic fields.
A positive stress change was observed, dependent on aggregate geometry.

Conclusions:

Time-profiled magnetic fields offer precise control over particle aggregate geometry in smart foams.
Optimized particle alignment leads to improved magnetoelastic properties.
This technique provides a pathway for designing advanced magnetic smart foams.