用于亲水和疏水处理气相二氧化硅的新型流变增强剂.pdf

1、1Novel rheology booster for hydrophilic and hydrophobically treated fumed silicaSarah VezzettiSeptember 4th2025Coatings Trends&Technologies Summit 20252Agenda|Public|Coatings Trends&Technologies Summit|Novel rheology booster for hydrophilic and hydrophobically treated fumed silica Background of sili

2、ca Development of novel synergist Experimental design-Thixotropy Novel synergist as tool to improve shear recovery Conclusions3Silica:An introduction The two most abundant elements in the earths crust:Oxygen and Silicon.There are a variety of precipitation methods and flame-based processes to manufa

3、cture SiO2products.All fumed SiO2products are synthetically produced and X-ray amorphous.Some applications:Rheological additives Filler material Flow enhancer for powders Insulation material Abrasion enhancers|Reference:AEROSIL Fumed Silica:Technical Overview(https:/ Trends&Technologies Summit|Novel

4、 rheology booster for hydrophilic and hydrophobically treated fumed silica4Production of fumed silica:Flame-based process|Reference:AEROSIL Fumed Silica:Technical Overview(https:/ fumed silica process can be expressed in the following straightforward equations:|Public|Coatings Trends&Technologies Su

5、mmit|Novel rheology booster for hydrophilic and hydrophobically treated fumed silica5Primary,secondary,and tertiary structures of fumed silica120 nmAggregate1,200 nm=1.2 micronAgglomerate12 nmPrimarySynthetic Silica is Not Crystalline|Public|Coatings Trends&Technologies Summit|Novel rheology booster

6、 for hydrophilic and hydrophobically treated fumed silica6Interparticle interactions To describe the rheological properties of dispersions that contain fumed silica it is essential to consider the ways in which the SiO2 particles interact with one another and with the dispersion phase.These interact