Core-Shell Structured Carbonyl Iron Microspheres Prepared via Dual-Step Functionality Coatings and Their Magnetorheological Response

被引：151
作者：
Fang, Fei Fei [1 ]
Liu, Ying Dan [1 ]
Choi, Hyoung Jin [1 ]
Seo, Yongsok [2 ,3 ]
机构：
[1] Inha Univ, Dept Polymer Sci & Engn, Inchon 402751, South Korea
[2] Seoul Natl Univ, Coll Engn, Intellectual Text Syst Res Ctr ITRC, Seoul 151744, South Korea
[3] Seoul Natl Univ, Coll Engn, Sch Mat Sci & Engn, Seoul 151744, South Korea
来源：
ACS APPLIED MATERIALS & INTERFACES | 2011年 / 3卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
magnetorheological fluid; carbonyl iron; polyaniline; carbon nanotube; magnetic particle; MAGNETIC-FIELD; ELECTRORHEOLOGICAL CHARACTERISTICS; YIELD-STRESS; POLYANILINE; SUSPENSIONS; FLUIDS; PARTICLES; ENCAPSULATION; DISPERSIONS; STABILITY;
D O I：
10.1021/am200714p
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The dispersion stability of soft magnetic carbonyl iron (CI)-based magnetorheological (MR) fluids was improved by applying a unique functional coating composed of a conducting polyaniline layer and a multiwalled carbon nanotube nest to the surfaces of the CI particles via conventional dispersion polymerization, followed by facile solvent casting. The coating morphology and thickness were analyzed by SEM and TEM imaging. Chemical composition of the polyaniline layer was detected by Raman spectroscope, which also confirmed the coating performance successfully. The influence of the functional coating on the magnetic properties was investigated by measuring the MR performance and sedimentation properties using a vibrating sample magnetometer, rotational rheometer, and Turbiscan apparatus. Improved dispersion characteristics of the MR fluid were observed.
引用
收藏
页码：3487 / 3495
页数：9
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