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Reinforced Smart Foams Produced with Time-Profiled Magnetic Fields
Daniele Davino1, Marco D'Auria1,2,3, Roberto Pantani4
1Dipartimento di Ingegneria, Università degli Studi del Sannio, Piazza Roma 21-24, 82100 Benevento, Italy.
Polymers
|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.
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.
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