Rheological and sealing properties study of carbon nanotube-modified high viscosity magnetic fluids

IF 3.8 2区工程技术 Q1 MECHANICS

Physics of Fluids Pub Date : 2025-09-01 DOI:10.1063/5.0276832

Chuding Zhang, Decai Li, Shilin Nie, Wenxi Zhao, Jixian Yang, Licong Jin

{"title":"Rheological and sealing properties study of carbon nanotube-modified high viscosity magnetic fluids","authors":"Chuding Zhang, Decai Li, Shilin Nie, Wenxi Zhao, Jixian Yang, Licong Jin","doi":"10.1063/5.0276832","DOIUrl":null,"url":null,"abstract":"The preparation of magnetic fluids (MFs) with high viscosity, high saturation magnetization, and high stability has long been a critical challenge hindering the progress of related applications. In this study, we successfully prepared carbon nanotube-modified Poly-Alpha-Olefine20-based magnetic fluids (CNT-MF). The rotational rheometer was employed for rheological characterization under different conditions. Through a self-built magnetic fluids sealing test rig, the impact of their rheological properties in practical working environments was verified. The results revealed that the CNT-MF achieved a saturation magnetization of up to 36.2 KA/m, an apparent viscosity exceeding 2336 mPa s (at 0 T, 1000 1/s shear rate, and 25 °C). When applied to magnetic fluid sealing, CNT-MF showed more excellent sealing performance, especially in low-speed sealing and small seal clearance conditions. In the static sealing with a 0.6 mm sealing gap, the sealing capacity value of CNT-MF exceeds that of PAO3.5-MF by more than 19.28%, which effectively demonstrates the significant improvement effect of the rheological properties of MF on sealing performance.","PeriodicalId":20066,"journal":{"name":"Physics of Fluids","volume":"37 9","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of Fluids","FirstCategoryId":"0","ListUrlMain":"https://doi.org/10.1063/5.0276832","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

The preparation of magnetic fluids (MFs) with high viscosity, high saturation magnetization, and high stability has long been a critical challenge hindering the progress of related applications. In this study, we successfully prepared carbon nanotube-modified Poly-Alpha-Olefine20-based magnetic fluids (CNT-MF). The rotational rheometer was employed for rheological characterization under different conditions. Through a self-built magnetic fluids sealing test rig, the impact of their rheological properties in practical working environments was verified. The results revealed that the CNT-MF achieved a saturation magnetization of up to 36.2 KA/m, an apparent viscosity exceeding 2336 mPa s (at 0 T, 1000 1/s shear rate, and 25 °C). When applied to magnetic fluid sealing, CNT-MF showed more excellent sealing performance, especially in low-speed sealing and small seal clearance conditions. In the static sealing with a 0.6 mm sealing gap, the sealing capacity value of CNT-MF exceeds that of PAO3.5-MF by more than 19.28%, which effectively demonstrates the significant improvement effect of the rheological properties of MF on sealing performance.

查看原文本刊更多论文

碳纳米管改性高粘度磁流体流变及密封性能研究

制备具有高粘度、高饱和磁化强度和高稳定性的磁流体一直是阻碍相关应用进展的关键挑战。在这项研究中，我们成功地制备了碳纳米管修饰的聚α -烯烃20基磁流体（CNT-MF）。采用旋转流变仪对不同条件下的流变特性进行了表征。通过自制的磁流体密封试验台，验证了其流变性能在实际工作环境中的影响。结果表明，cnts - mf的饱和磁化强度高达36.2 KA/m，表观粘度超过2336 mPa s（在0 T， 1000 1/s剪切速率和25°C下）。应用于磁流体密封时，cnts - mf表现出更优异的密封性能，特别是在低速密封和小密封间隙条件下。在密封间隙为0.6 mm的静密封中，cnts -MF的密封容量值比PAO3.5-MF高出19.28%以上，有效证明了MF流变特性对密封性能的显著改善作用。

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

Physics of Fluids 物理-力学

CiteScore

6.50

自引率

41.30%

发文量

2063

审稿时长

2.6 months

期刊介绍： Physics of Fluids (PoF) is a preeminent journal devoted to publishing original theoretical, computational, and experimental contributions to the understanding of the dynamics of gases, liquids, and complex or multiphase fluids. Topics published in PoF are diverse and reflect the most important subjects in fluid dynamics, including, but not limited to: -Acoustics -Aerospace and aeronautical flow -Astrophysical flow -Biofluid mechanics -Cavitation and cavitating flows -Combustion flows -Complex fluids -Compressible flow -Computational fluid dynamics -Contact lines -Continuum mechanics -Convection -Cryogenic flow -Droplets -Electrical and magnetic effects in fluid flow -Foam, bubble, and film mechanics -Flow control -Flow instability and transition -Flow orientation and anisotropy -Flows with other transport phenomena -Flows with complex boundary conditions -Flow visualization -Fluid mechanics -Fluid physical properties -Fluid–structure interactions -Free surface flows -Geophysical flow -Interfacial flow -Knudsen flow -Laminar flow -Liquid crystals -Mathematics of fluids -Micro- and nanofluid mechanics -Mixing -Molecular theory -Nanofluidics -Particulate, multiphase, and granular flow -Processing flows -Relativistic fluid mechanics -Rotating flows -Shock wave phenomena -Soft matter -Stratified flows -Supercritical fluids -Superfluidity -Thermodynamics of flow systems -Transonic flow -Turbulent flow -Viscous and non-Newtonian flow -Viscoelasticity -Vortex dynamics -Waves