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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
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~~
关键词
水基磁流变液
羰基铁粉
溶胶-凝胶
核壳粒子
water-based magnetorheological fluid
carbonyl iron powder
sol-gel
core shell particle
