Control of the morphology of nanostructured particles prepared by the spray drying of a nanoparticle sol

被引:319
作者
Iskandar, F
Gradon, L
Okuyama, K
机构
[1] Hiroshima Univ, Grad Sch Engn, Dept Chem Engn, Higashihiroshima 7398527, Japan
[2] Warsaw Univ Technol, Fac Chem & Proc Engn, PL-00645 Warsaw, Poland
[3] Hiroshima Joint Res Ctr, Japan Chem Innovat Inst, Nanotechnol Particle Project, Higashi Ku, Hiroshima 7398530, Japan
关键词
spray drying method; morphology; toroidal shape particles; silica particles; aerosol;
D O I
10.1016/S0021-9797(03)00519-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The control of the morphology of nanostructured particles prepared by the spray drying of nanoparticle sol was investigated experimentally and the results are qualitatively explained based on available theory. A theoretical analysis indicates that the structural stability of the droplet and the hydrodynamic effects during the drying process play important roles in controlling the morphology of the resulting particles. The size of the sol in the droplet, droplet size, viscosity of droplet, drying temperature, gas flow rate, and addition of surfactant are all crucial parameters that affect the morphology of particles. Experimentally, nanostructured silica particles were prepared from a nanosize silica sol under various preparation conditions. Doughnut-shaped particles can be produced when the droplet size is large, in conjunction with high temperature, high gas flow rate and in the presence of an added surfactant. Appropriate choice of the spray drying method permits control of the particle size and shape, ranging from spheres to ellipsoids as well as doughnut-shaped particles by varying the preparation conditions. The results open a new route to controlling the formation of a wide variety of nanostructured particles. (C) 2003 Elsevier Inc. All rights reserved.
引用
收藏
页码:296 / 303
页数:8
相关论文
共 14 条
[1]   Size-dependent lens angles for small oil lenses on water [J].
Aveyard, R ;
Clint, JH ;
Nees, D ;
Paunov, V .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1999, 146 (1-3) :95-111
[2]  
CONCUS P, 1987, VARIATIONAL METHODS
[3]   Functional nanostructured silica powders derived from colloidal suspensions by sol spraying [J].
Iskandar, F ;
Lenggoro, IW ;
Xia, B ;
Okuyama, K .
JOURNAL OF NANOPARTICLE RESEARCH, 2001, 3 (04) :263-270
[4]   In situ production of spherical silica particles containing self-organized mesopores [J].
Iskandar, F ;
Mikrajuddin ;
Okuyama, K .
NANO LETTERS, 2001, 1 (05) :231-234
[5]  
Joseph D.D., 2013, Stability of fluid motions I, Volume, V27
[6]  
Maskara A, 1997, J AM CERAM SOC, V80, P1715
[7]  
Master K, 1991, SPRAY DRYING HDB
[8]   PENDULAR RINGS BETWEEN SOLIDS - MENISCUS PROPERTIES AND CAPILLARY FORCE [J].
ORR, FM ;
SCRIVEN, LE ;
RIVAS, AP .
JOURNAL OF FLUID MECHANICS, 1975, 67 (FEB25) :723-742
[9]   ON CONVECTION CELLS INDUCED BY SURFACE TENSION [J].
PEARSON, JRA .
JOURNAL OF FLUID MECHANICS, 1958, 4 (05) :489-500
[10]  
Princen H.M., 1969, Surface Colloid Sci, V2, P1