TY - JOUR
T1 - Dispersive action of octane for cobalt nano-particles
AU - Meng, Haining
AU - Zhao, Fangxia
AU - Zhang, Zhenzhong
AU - Qiu, Tai
PY - 2013/1
Y1 - 2013/1
N2 - In order to prepare nano-grained WC-Co cemented carbides with high performance, the dispersion of cobalt nano-particles in octane was studied. Three fatty acids, 12-hydroxystearic acid, stearic acid and oleic acid, were used as surfactants to modify the cobalt nano-particles in octane. The adsorption behavior, surface characteristics, suspension stability and rheological behavior were investigated by chemical titration, FT-IR spectroscopy, UV-vis spectroscopy and rheometer, respectively. The results indicated that the cobalt nano-particles modified with 12-hydroxystearic acid achieved the best dispersion performance and suspension stabilization, and 12-hydroxystearic acid also exhibited the highest ability to reduce interparticle van der Waals potential energy. The adsorption of 12-hydroxystearic acid onto the surface of cobalt nano-particles is a chemical and physical process, but the adsorption of stearic acid or oleic acid is only a chemical one.
AB - In order to prepare nano-grained WC-Co cemented carbides with high performance, the dispersion of cobalt nano-particles in octane was studied. Three fatty acids, 12-hydroxystearic acid, stearic acid and oleic acid, were used as surfactants to modify the cobalt nano-particles in octane. The adsorption behavior, surface characteristics, suspension stability and rheological behavior were investigated by chemical titration, FT-IR spectroscopy, UV-vis spectroscopy and rheometer, respectively. The results indicated that the cobalt nano-particles modified with 12-hydroxystearic acid achieved the best dispersion performance and suspension stabilization, and 12-hydroxystearic acid also exhibited the highest ability to reduce interparticle van der Waals potential energy. The adsorption of 12-hydroxystearic acid onto the surface of cobalt nano-particles is a chemical and physical process, but the adsorption of stearic acid or oleic acid is only a chemical one.
KW - Cobalt nano-particles
KW - Dispersion performance
KW - Fatty acids
KW - Suspension stabilization
UR - http://www.scopus.com/inward/record.url?scp=84870237317&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmhm.2012.09.007
DO - 10.1016/j.ijrmhm.2012.09.007
M3 - 文章
AN - SCOPUS:84870237317
SN - 0263-4368
VL - 36
SP - 254
EP - 259
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
ER -