由于硅胶存在Si-OH基团，使得其表面极性且亲水，修饰SG一般需用硅烷

The presence of Si-OH groups in silica gel makes its surface polar and hydrophilic. Modified SG generally needs to be silanized with a silane coupling agent to reduce the adsorption of silica gel to polar substances and increase its resistance to non-polar substances or The affinity of weakly polar substances before the introduction of organic functional groups.

Due to the existence of Si OH groups on silica gel, its surface is polar and hydrophilic. Generally, silane coupling agent is required to silylate the modified SG to reduce the adsorption of silica gel to polar substances, increase its affinity to non-polar substances or weakly polar substances, and then introduce organic functional groups.

Because of the existence of Si-OH groups in silica gel, its surface is polar and hydrophilic. To modify SG, silane coupling agent is usually used to silanize it, so as to reduce the adsorption of silica gel to polar substances, increase its affinity to nonpolar substances or weakly polar substances, and then introduce organic functional groups.