Discussion on Influencing Factors of the Silicone Oil Emulsion Particle Diameter

The silicone oil emulsion was prepared with dimethicone as the main material and non-ionic surfactant as an emulsifier.The amount of the emulsifier,the time and temperature of emulsification,pH,stir speed,emulsifying water temperature and emulsification methods to the silicone oil emulsion particle diameter were discussed.The experimental result showed that the particle diameter was not significantly affected at the 50～90 ℃.The amount of the emulsifier,emulsifying time,pH,stirring speed and emulsification methods had a significant influence on the particle diameter.The condition was as follows:w(emulsifier)7%,emulsification time 45 min,emulsification temperature 80 ℃,pH was about 6,stir speed 1 200 r/min.The silicone oil content in the silicone oil emulsion reached 30% under this condition.The average particle diameter 1.561 μm,refractive index rate 1.403,the apparent viscosity 216 mPa·s.Under the condition,the parting agent producer prepared an excellent performance of silicone oil emulsion parting agent products.