We report tuning of the moduli and surface roughness of magnetorheological elastomers (MREs) by varying applied magnetic field. Ultrasoft MREs are fabricated using a physiologically relevant commercial polymer, Sylgard^TM 527, and carbonyl iron powder (CIP). We found that the shear storage modulus, Young’s modulus, and root-mean-square surface roughness are increased by ∼41, ∼11, and ∼11, respectively, when subjected to a magnetic field strength of 95.5 kA m⁻¹. Single fit parameter equations are presented that capture the tunability of the moduli and surface roughness as a function of CIP volume fraction and magnetic field strength. These magnetic field-induced changes in the mechanical moduli and surface roughness of MREs are key parameters for biological applications.

我们报告了通过改变外加磁场来调节磁流变弹性体（MRE）的模量和表面粗糙度。 Ultrasoft MRE 使用生理相关的商业聚合物 Sylgard ^TM 527 和羰基铁粉 (CIP) 制造。我们发现，当磁场强度为 95.5 kA m ^-1时，剪切储能模量、杨氏模量和均方根表面粗糙度分别增加~41、~11 和~11。提出了单一拟合参数方程，捕捉模量和表面粗糙度的可调性作为 CIP 体积分数和磁场强度的函数。这些磁场引起的 MRE 机械模量和表面粗糙度的变化是生物应用的关键参数。