Synthesis and Application of Magnetic Soft Materials Demonstrating Drastic Magnetoelastic Behavior

获得了一种新型磁响应性弹性体，该弹性体在空气中的弹性模数发生了剧烈和可逆的变化。磁性弹性体是由聚氨基甲酸酯和羰基铁粉组成的磁性弹性体。在500mT的磁场下，磁性弹性体的储能模数可逆地增加了800倍，这是过去磁流变软材料中的最高值。研究了海参磁弹性体弹性模数急剧变化的机理，模拟海参弹性模数的变化，改善了磁弹性体的磁流变性能。振动实验表明，本研究得到的磁性弹性体具有通过改变弹性模数来控制振动模式的能力。

A new magnetic responsive elastomer that demonstrates drastic and reversible changes in elastic modulus in air was obtained. The magnetic elastomer consists of polyurethane and carbonyl iron particles, which is called magnetic elastomer. The magnetic elastomer exhibited a reversible increase by a factor of 800 of the storage modulus upon a magnetic field of 500 mT, which is the highest value in the past magnetorheological soft materials. The mechanism of the drastic changes in elastic modulus was investigated and the magnetorheological property of magnetic elastomers was improved mimic to the modulus change of sea cucumber. Vibration experiments revealed that the magnetic elastomer obtained in this study has an ability to control the vibration mode by changing elastic modulus.