Since the main chain of organosilicon surfactants is a soft Si—O bond, which is neither hydrophilic nor lipophilic, it can be used in aqueous solutions and non-aqueous media that cannot be used with ordinary hydrocarbon surfactants. On the other hand, silicone surfactants are arranged on the interface with methyl groups, which can reduce the surface tension to about 20mN/m, while ordinary hydrocarbon surfactants are arranged on the interface with methylene groups, which can only reduce the surface tension. To about 30mN/m.
      Among the silicone surfactants, EO/PO modified silicone surfactants are the most commonly used. Its performance is related to the ratio of EO/PO and the degree of polymerization of the surfactant. EO is the hydrophilic part of the surfactant modification group, and PO is the lipophilic part. When the EO/PO ratio changes, the performance of silicone surfactants will change. Studies have found that if the EO/PO ratio becomes larger, the HLB value of the surfactant will increase, indicating that the hydrophilicity is enhanced; if the EO/PO ratio becomes smaller, the hydrophilicity of the surfactant will be weakened. When the length of EO of grafted polyether-modified silicone oil is the same, its surface tension increases as the degree of polymerization of polysiloxane decreases. This is because the shorter the molecular chain of polysiloxane, the tighter the packing at the air/water interface, and the more methyl groups on the surface. When PO is introduced, the hydrophobicity of the polyether chain is increased, thereby increasing the surface tension of the polyether-modified silicone oil.