一种中等表面积的气相二氧化硅，使用聚二甲基硅氧烷对它进行表面改性。

CAB-O-SIL TS-720 fumed silica is a medium surface area fumed silica which has been surface treated with polydimethylsiloxane (PDMS). This surface treatment results in a hydrophobic silica with a very different performance than untreated silica.
CAB-O-SIL TS-720 fumed silica is characterized by:
♦ High purity
♦ Aggregated structure
♦ Submicron particle size
♦ Low bulk density
♦ Hydrophobic surface chemistry