The influence of aspect ratio on the properties of cobalt nanowire-based magnetorheological fluids

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-10-02 DOI:10.1080/19475411.2022.2130466

R. C. Bell, N. Wereley

{"title":"The influence of aspect ratio on the properties of cobalt nanowire-based magnetorheological fluids","authors":"R. C. Bell, N. Wereley","doi":"10.1080/19475411.2022.2130466","DOIUrl":null,"url":null,"abstract":"ABSTRACT The yield stress of magnetorheological (MR) fluids has been shown to depend on particle morphology, but the exact nature of this contribution is still not fully understood. In this study, MR fluids containing 4 vol. % cobalt particles (spherical particles vs. nanowires) suspended in silicone oil were investigated. The influence of the aspect ratio on the rheological properties of suspensions that contained cobalt nanowires with aspect ratios ranging from 10 to 101 in increments of ~6 is described. The cobalt nanowires were fabricated using alumina template-based electrodeposition, producing wires with 305 ± 66 nm diameters. The shear stress was measured as a function of shear rate for increasing applied magnetic fields. The apparent yield stress and viscosity as a function of changing aspect ratio of the nanowire suspensions were determined. At a saturated magnetic flux density, the yield stress was found to increase linearly up to an aspect ratio of 23 (7.1 μm long wires) at which time the yield stress reached a plateau of 3.7 kPa even as the aspect ratio was further increased. As a comparison, suspensions containing 4 vol. % 1.6 μm spherical cobalt particles only reached a maximum yield stress of 1.6 kPa. Graphical abstract","PeriodicalId":48516,"journal":{"name":"International Journal of Smart and Nano Materials","volume":"13 1","pages":"626 - 642"},"PeriodicalIF":4.5000,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Smart and Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/19475411.2022.2130466","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 2

Abstract

ABSTRACT The yield stress of magnetorheological (MR) fluids has been shown to depend on particle morphology, but the exact nature of this contribution is still not fully understood. In this study, MR fluids containing 4 vol. % cobalt particles (spherical particles vs. nanowires) suspended in silicone oil were investigated. The influence of the aspect ratio on the rheological properties of suspensions that contained cobalt nanowires with aspect ratios ranging from 10 to 101 in increments of ~6 is described. The cobalt nanowires were fabricated using alumina template-based electrodeposition, producing wires with 305 ± 66 nm diameters. The shear stress was measured as a function of shear rate for increasing applied magnetic fields. The apparent yield stress and viscosity as a function of changing aspect ratio of the nanowire suspensions were determined. At a saturated magnetic flux density, the yield stress was found to increase linearly up to an aspect ratio of 23 (7.1 μm long wires) at which time the yield stress reached a plateau of 3.7 kPa even as the aspect ratio was further increased. As a comparison, suspensions containing 4 vol. % 1.6 μm spherical cobalt particles only reached a maximum yield stress of 1.6 kPa. Graphical abstract

查看原文本刊更多论文

宽高比对钴纳米线磁流变液性能的影响

摘要磁流变流体的屈服应力已被证明取决于颗粒形态，但这种贡献的确切性质仍不完全清楚。在本研究中，研究了悬浮在硅油中的含有4体积%钴颗粒（球形颗粒与纳米线）的MR流体。描述了长径比对含有长径比为10-101的钴纳米线的悬浮液流变性能的影响，其增量为~6。使用氧化铝模板电沉积制备了钴纳米线，产生了直径为305±66nm的导线。剪切应力是作为剪切速率的函数来测量的，以增加所施加的磁场。测定了表观屈服应力和粘度作为纳米线悬浮液纵横比变化的函数。在饱和磁通密度下，发现屈服应力线性增加，直到纵横比为23（7.1μm长的线材），此时即使纵横比进一步增加，屈服应力也达到3.7kPa的平台。相比之下，含有4vol.%1.6μm球形钴颗粒的悬浮液仅达到1.6kPa的最大屈服应力。图形摘要

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.