Abstract

Magnetoactive elastomers based on polydimethylsiloxane functional oligomers with a concentration of magnetic iron microparticles of 70, 75, and 80 wt % are synthesized. Soft samples with low (about 2 kPa) elastic moduli are obtained by introducing side chains into the polymer network without using a low molecular weight oil. It is shown that the rigidity of the matrix can be controlled by varying the concentration of only the crosslinking agent. The obtained magnetoactive elastomers have a high magnetic field response: the relative growth of the real part of the dynamic shear modulus of soft samples exceeds two orders of magnitude and reaches 400 in a magnetic field of 1 T. The contact angle of water with the surface of the composites increases to 140° in a magnetic field of the order of 400 mT.

中文翻译：

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具有高磁场响应的磁活性复合材料的低模量弹性体矩阵

摘要

合成了基于聚二甲基硅氧烷官能低聚物的磁活性弹性体，其磁性铁微粒的浓度为70、75和80 wt％。通过在不使用低分子量油的情况下将侧链引入到聚合物网络中，可以获得具有低（约2 kPa）弹性模量的软样品。结果表明，仅改变交联剂的浓度就可以控制基质的刚性。所获得的磁活性弹性体具有较高的磁场响应：软样品的动态剪切模量的实部的相对增长超过两个数量级，并且在1 T的磁场中达到400。水与表面的接触角在400 mT的磁场中，复合材料的厚度增加到140°。