The Preparation Of Silicone Oil Emulsion And Its Application

Silicone oil has been widely used in the cosmetics, paint, textile finishing agent,waterproofing agent and other fields. The performance of Silicone oil was greatly improvedafter emulsification, which also expanded the application field of silicone oil. However, nowthere are few research reports about the details of the preparation of the emulsion and itsapplication in coal waterproof, defoaming agent and antifouling agent of polishing brick.This paper systematically studied the optimum preparation of silicone oil emulsion withdimethyl silicone oil emulsion, emulsifier, distilled water as the raw materiasl under the highintensity mixing. Experiments were discussed in the stirring speed, stirring time, the siliconeoil-emulsifier ratio and other conditions for the preparation of silicone oil emulsion. Theexperimental results showed that the optimum stirring speed was1200-1400r/min, theoptimum mixing time was60min, silicone oil-emulsifier ratio was1:0.5, Span-60-Tween-60mass ratio was0.430.57. The silicone oil emulsion has good stability and dispersity.We respectively studied the application of silicone oil emulsion prepared before as thewaterproofing agent for briquette, defoaming agent and the antifouling agent for polishingbrick. We discussed the effect of different content of silicone oil of emulsion on thewaterproofing performance of briquette. The waterproofing effect was characterized bydetermining the water absorption, water absorption rate and the contact angle of the briquettesurface; This paper also discussed the effect of different particle size and content of SiO2onthe defoaming performance of silicone oil emulsion. The defoaming performance wascharacterized and the defoaming mechanism of silicone oil emulsion was also studied bydetermining defoaming time, defoaming rate, and particle size of emulsion, etc; Finally, theeffect of the content of silicone oil in emulsion, the dosage of silicone oil emulsion and theaddition of SiO2particles on the antifouling performance for polishing brick was discussed.The surface structure changes of polishing brick before and after coating with emulsion was compared by SEM test. The results showed that the waterproof effect of briquette wasincreased significantly after coating with emulsion on the surface; The defoamingperformance of emulsion is good. After adding SiO2particles into the emulsion, thedefoaming time of the emulsion was shortened, and the defoaming rate was increasedsignificantly; The anti-fouling effect of polishing brick was significantly increased aftercoating with the emulsion. At the same time, the polishing brick surface has the self-cleaningperformance of hydrophobicity and oleophobicity after coating with the emulsion of SiO2particles. So, the silicone oil emulsion have all good application effect in waterproof,defoaming agent and antifouling agent.