Synthesis and Application of Magnetic Soft Materials Demonstrating Drastic Magnetoelastic Behavior

得到了一种在空气中弹性模量发生剧烈可逆变化的新型磁响应弹性体。磁性弹性体是由聚氨酯和羰基铁颗粒组成的，称为磁性弹性体。磁性弹性体在500 mT的磁场下表现出储能模量可逆增加800倍，这是过去磁流变软材料中的最高值。探讨了弹性模量急剧变化的机理，并模拟海参的弹性模量变化，改善了磁性弹性体的磁流变性能。振动实验表明，本研究中获得的磁性弹性体具有通过改变弹性模量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.