物理化学学报 >> 2005, Vol. 21 >> Issue (07): 817-821.doi: 10.3866/PKU.WHXB20050724

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聚乙二醇包裹羰基铁核壳粒子的制备及水基磁流变液的性能

李立春; 官建国; 程海斌; 陶剑青   

  1. 武汉理工大学材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2004-11-16 修回日期:2005-02-22 发布日期:2005-07-15
  • 通讯作者: 官建国 E-mail:guanjg@mail.whut.edu.cn

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

LI Li-chun; GUAN Jian-guo; CHENG Hai-bin; TAO Jian-qing   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070
  • Received:2004-11-16 Revised:2005-02-22 Published:2005-07-15
  • Contact: GUAN Jian-guo E-mail:guanjg@mail.whut.edu.cn

摘要: 以羰基铁粉(CI)为原料用共溶胶-凝胶反应制备CI/聚乙二醇核壳复合粒子,并将其与水组成了磁流变液. 用SEM、TEM、FT-IR和VSM表征了核壳复合粒子的微观结构和静磁特性,并测试了水基磁流变液的性能. 结果表明,核壳复合粒子表面有SiOx和聚乙二醇的包覆层,它有较好的亲水性和优良的软磁特性,用它组成的水基磁流变液具有抗沉降性优良、零场粘度低、磁流变效应显著等特点.

关键词: 水基磁流变液, 羰基铁粉, 溶胶-凝胶, 核壳粒子

Abstract: 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.

Key words: Water-based magnetorheological fluid, Carbonyl iron powder, Sol-gel, Core shell particle