PMMA coated carbonyl iron microbeads and their magnetic characteristics

✍ Scribed by Kim, Min Su ;Cho, Min Sung ;Choi, Hyoung Jin

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 165 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200777351

✦ Synopsis

Abstract

In order to improve the stability of magnetorheological (MR) fluid, we synthesized poly(methyl methacrylate) (PMMA) ‐ encapsulated carbonyl iron (CI) particles by an in‐situ dispersion polymerization method. In addition, PMMA shell was cross‐linked by a cross‐linking agent. The cross‐linked PMMA is expected to be more effective than non‐cross‐linked PMMA, improving the physical properties. The synthesized CIPMMA composite particles were characterized by SEM, and VSM. Cross‐linking of PMMA was also confirmed by measuring the FT‐IR after etching process. Rheological properties of the PMMA‐coated CI based MR fluid were measured via a rotational rheometer. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)