芳香族小分子物质在表面活性剂溶液中的状态

阴、阳离子表面活性剂在水溶液中混合后很容易形成沉淀，因而以往在应用上将这两种表面活性剂视为配伍禁忌。但是最近几年，混合阴、阳离子表面活性剂水溶液理论性质的研究受到了一种程度的重视。研究发现，该混合体系具有与单纯的离子型表面活性剂或离子与非离子型表面活性剂混合物十分不同的性质，

State of aromatic micromolecule in aqueous of cationic and anionic surfactants mixture

The state of aromatic micromolecule in cationic-anionic surfactant mixtures was investigated by the determination of distribution ratio of sodium benzoate and phenylaetic acid in them, respectively. As a result, the non-bar structures of benzoic ion and pheylacetic ion made them scarely be able to pentrarte into organized aggregations. Benzoic ions are mostly attracted by the organized aggregations positively charged, so they existed mainly in couterion layer. While phenylacetic ion, because of its steric effect, had a weak attraction to organized aggregations positively charged, which is weaker than the acting forces of hydrogen bond among pheylacetic acid molecules. So phenylacetic acid molecules did not exist in couterion layer, but it existed as hydrogen-bond form mainly.