[Preparation and characterization of a polyvinylpyrrolidone water-based magnetic fluid].
OBJECTIVE
To prepare a stable water-based magnetic fluid.


METHODS
A water-based magnetic fluid was prepared by addition of polyvinylpyrrolidone (PVP) as the coating agent for the magnetic particles. After preparation of Fe3O4 by co-precipitation method, PVP was added for its coating, followed by ultrasonic agitation and purification.


RESULTS
The magnetic nanoparticles of homogeneously small size and water-based magnetic fluid were obtained, which had good dispersion in water with strong magnetism.


CONCLUSIONS
PVP can be used as a surfactant to stabilize the magnetic fluid.
Xie
Jian-feng
JF
Institute of Biomedical Engineering, Central South University, Changsha 410008, China.
Zhang
Yang-de
YD
Zeng
Zhao-wu
ZW
Wang
Xiao-li
XL
Liu
Xing-yan
XY
Zhou
Wei-hua
WH
D005296:Ferrous Compounds / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry*; D011205:Povidone / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000138:chemical synthesis* / Q000737:chemistry
D005296:Ferrous Compounds; D013501:Surface-Active Agents; D011205:Povidone; C029451:ferrous chloride