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Citation: LI Li-chun, GUAN Jian-guo, CHENG Hai-bin, TAO Jian-qing. Preparation of Poly(ethylene glycol)-coated Carbonyl Iron Particles for Aqueous Magnetorheological Suspension[J]. Acta Physico-Chimica Sinica, ;2005, 21(07): 817-821. doi: 10.3866/PKU.WHXB20050724 shu

Preparation of Poly(ethylene glycol)-coated Carbonyl Iron Particles for Aqueous Magnetorheological Suspension

1.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070

Received Date: 16 November 2004
Available Online: 15 July 2005

A novel magnetorheological (MR) suspension is based on the mixture of poly(ethylene glycol)-coated carbonyl iron particles, prepared by the co-sol-gel reaction using carbonyl iron particles as raw materials, and water without any additive. The microstructure, magnetic and magnetorheological properties of the core-shell particles are characterized by SEM、TEM、FT-IR、VSM. The results show that the particles prepared have core-shell structure with a polymer shell of less than 100 nm; both the core-shell particles and its water based MR suspension exhibit excellent soft magnetic performance; the water based MR suspension shows low zero viscosity and high MR effects, especially greatly improved anti-settlement and redispersibility. The phenomena are attributed to the hydrophilic thin shell of the core-shell particles.
- Water-based magnetorheological fluid;Carbonyl iron powder;Sol-gel; Core shell particle
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