论文信息 - The mechanical behavior of smart magnet–hydrogel composites

The mechanical behavior of smart magnet–hydrogel composites

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 1–10 wt%) to the application of a static magnetic field (up to a maximum of 40 mT) 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 Fe3O4 content. Finally, two approaches were used to evaluate this ferrogel system for artificial muscle or soft actuator applications.

Raju V. Ramanujan | R. Ramanujan | L. L. Lao | L L Lao

[1] Zhibing Hu,et al. Shape memory gels made by the modulated gel technology , 1997 .

[2] Philip Ball. Made to Measure: New Materials for the 21st Century , 1997 .

[3] A. Yamauchi. Synthetic Vitreous Body of PVA Hydrogel , 1991 .

[4] A. Cliquet,et al. Artificial grasping system for the paralyzed hand. , 2000, Artificial organs.

[5] K. Kim,et al. Ionic polymer-metal composites: I. Fundamentals , 2001 .

[6] R. Cahn,et al. Made to Measure: New Materials for the 21st Century , 1998 .

[7] Georges Bossis,et al. ELECTROACTIVE AND ELECTROSTRUCTURED ELASTOMERS , 2001 .

[8] Miklós Zrínyi,et al. Shape Transition of Magnetic Field Sensitive Polymer Gels , 1998 .

[9] Mohsen Shahinpoor,et al. Mechanoelectric effects in ionic gels , 2000 .

[10] Nikolaos A. Peppas,et al. Structure and Applications of Poly(vinyl alcohol) Hydrogels Produced by Conventional Crosslinking or by Freezing/Thawing Methods , 2000 .