论文信息 - Ferrogel: a new magneto-controlled elastic medium

Ferrogel: a new magneto-controlled elastic medium

Abstract Magnetic-field-sensitive gels, called ferrogels, have been prepared by introducing monodomain, magnetite particles of colloidal size into chemically crosslinked poly(vinyl alcohol) hydrogels. The influence of a non-uniform external magnetic field on the shape of gel tubes and the possibility to induce elongation and contraction by means of a magnetic field gradient produced by an electromagnet have been demonstrated. It was shown that both the concentration of magnetite particles and the crosslinking density of the ferrogels play an essential role in the magneto-elastic behaviour.

[1] Bimodal networks and networks reinforced by the in situ precipitation of silica , 1985 .

[2] A. R. Khokhlov,et al. Electroosmotic transport of water in polyelectrolyte networks , 1991 .

[3] J. E. Mark,et al. Rubberlike Elasticity: A Molecular Primer , 1988 .

[4] Y. Sawada,et al. Nonlinear oscillations of a polar‐liquid column under unipolar‐ion injection , 1980 .

[5] F. Horkay,et al. Studies on the mechanical and swelling behavior of polymer networks based on the scaling concept. 4. Extension of the scaling approach to gels swollen to equilibrium in a diluent of arbitrary activity , 1982 .

[6] V. Bashtovoi,et al. Introduction to Thermomechanics of Magnetic Fluids , 1987 .

[7] Masayoshi Okubo,et al. Makromol Chem-Macromol Symp , 1990 .

[8] Toyoichi Tanaka,et al. Collapse of Gels in an Electric Field , 1982, Science.