Andy T Clark, Alexander Bennett, Emile Kraus, Katarzyna Pogoda, Andrejs Cēbers, Paul Janmey, Kevin T Turner, Elise A Corbin, Xuemei Cheng
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引用次数: 2
摘要
本文报道了磁流变弹性体(MREs)的模量和表面粗糙度随外加磁场的变化而变化。Ultrasoft MREs是使用生理学相关的商业聚合物Sylgard™527和羰基铁粉(CIP)制造的。结果表明，当磁场强度为95.5 kA m-1时，材料的剪切存储模量、杨氏模量和表面均方根粗糙度分别提高了~ 41x、~ 11x和~ 11x。提出了单拟合参数方程，该方程捕捉了模量和表面粗糙度作为CIP体积分数和磁场强度的函数的可调性。这些磁场引起的MREs机械模量和表面粗糙度的变化是生物应用的关键参数。
Magnetic field tuning of mechanical properties of ultrasoft PDMS-based magnetorheological elastomers for biological applications.
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™ 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.
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