Four new types of organic siloxane surfactants with quaternary ammoniumgroup have been obtained.
通过多步骤合成了四种含有季铵基的有机硅表面活性剂。
2
The catalyst also contains urea and quaternary ammonium groups, and long-fluorine hydrophobic group which can reduce the surface tension of water.
该催化剂同时含有双脲基和季铵盐基团以及疏水基的长氟链。
3
A cationic polymeric flocculant was chosen because its hydrolysate with positive ammoniumgroup enhanced the adsorption of residual COD and improved the flocculation efficiency.