The mechanical behavior of smart magnet-hydrogel composites

R. V. Ramanujan; L. L. Lao

doi:10.1088/0964-1726/15/4/008

The mechanical behavior of smart magnet-hydrogel composites

R. V. Ramanujan^*, L. L. Lao

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

133 Citations (Scopus)

Abstract

Micron sized magnetic particles (Fe₃O₄) were dispersed in a polyvinyl alcohol (PVA) hydrogel. This multiferroic ferrogel combines the elastic properties of PVA gel and the magnetic properties of Fe₃O₄ particles. The response of the ferrogel (with Fe₃O₄ concentration in the range of 1-10wt%) to the application of a static magnetic field (up to a maximum of 40mT) was investigated. The results showed that the extent of deflection depended strongly on the Fe₃O₄ content and the magnetic field strength. For each Fe₃O₄ concentration there existed a threshold value of magnetic field strength before large deflection occurred. This implied that the ferrogel system can be used as an 'on-off' type transducer. The threshold value decreases with an increase in Fe ₃O₄ content. Finally, two approaches were used to evaluate this ferrogel system for artificial muscle or soft actuator applications.

Original language	English
Article number	008
Pages (from-to)	952-956
Number of pages	5
Journal	Smart Materials and Structures
Volume	15
Issue number	4
DOIs	https://doi.org/10.1088/0964-1726/15/4/008
Publication status	Published - Aug 1 2006
Externally published	Yes

ASJC Scopus Subject Areas

Signal Processing
Civil and Structural Engineering
Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Mechanics of Materials
Electrical and Electronic Engineering

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10.1088/0964-1726/15/4/008

Cite this

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AB - Micron sized magnetic particles (Fe3O4) were dispersed in a polyvinyl alcohol (PVA) hydrogel. This multiferroic ferrogel combines the elastic properties of PVA gel and the magnetic properties of Fe3O4 particles. The response of the ferrogel (with Fe3O4 concentration in the range of 1-10wt%) to the application of a static magnetic field (up to a maximum of 40mT) was investigated. The results showed that the extent of deflection depended strongly on the Fe3O4 content and the magnetic field strength. For each Fe3O4 concentration there existed a threshold value of magnetic field strength before large deflection occurred. This implied that the ferrogel system can be used as an 'on-off' type transducer. The threshold value decreases with an increase in Fe 3O4 content. Finally, two approaches were used to evaluate this ferrogel system for artificial muscle or soft actuator applications.

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The mechanical behavior of smart magnet-hydrogel composites

Abstract

ASJC Scopus Subject Areas

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