| Abstract In this paper,microencapsulation mechanism of ultramarine particles in W/O emulsion was investigated.We made an approach to the relationship between surface fractal dimensionality(D) and surface shape of particles.The results show:In W/O emulsion, ultramarine particles get into aqueous beads of emulsion , forming “microreactor”. The reaction of microencapsulation takes place on the surface of particles in beads of W/O emulsion, which forms membrane of silicagel capsule,and the acid-resistance of ultramarine can be effectively improved. Shape of particle surface can be quantitatively characterized by surface fractal dimensionality.Value D may be used for explaining acid-reistance of ultramarine. |
|
1997, Vol. 14 
