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  

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

作　　者：李立春[1] 官建国[1] 程海斌[1] 陶剑青[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《物理化学学报》2005年第7期817-821,共5页Acta Physico-Chimica Sinica

基　　金：国家高技术研究发展规划(863)项目(2001AA339020)资助项目~~

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.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 coreshell 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.

关 键 词：水基磁流变液 羰基铁粉 溶胶-凝胶 核壳粒子 

分 类 号：TB381[一般工业技术—材料科学与工程]