Surface modification wet modification of silica
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The wet modification is divided into two types. One is to heat and dry the dried white carbon black and the modifier in an organic solvent, reflux, and then separate and dry. The main features of the law are that the quality of the product is controllable and the amount of modifier is small. The disadvantage is that the post-treatment process of the product is complicated, which is easy to cause organic solvent pollution, and it is difficult to achieve large-scale production. The second is direct modification during the preparation of precipitated silica. The main features of the law are simple process, less auxiliary equipment, and cost savings.
