长、短链非离子双亲化合物在油/水界面的混合吸附

The Mixed Adsorption of Long and Short Chain Noionic Amphipathic Compound at Oil/Water Interface

建立了短链双亲化合物与非离子表面活性剂在油/水界面的混合吸附等式。结果表明,单独存在时具有较大饱和吸附量的溶质在混合体系中强烈地优先吸附。在乙二醇单丁醚与Triton-X-100混合体系中,具有较大饱和吸附量的短链的乙二醇单丁醚在甲苯/水界面的优先吸附使界面膜强度减弱从而导致乳液聚结稳定性显著下降。理论预测结果与实验结果完全符合。

An isothermal adsorption equation describing the mixed adsorption of short chain amphipathic compound (SCAC) with nonionic surfactant at oil/water interface is established. The result shows that in the mixed system the solute having larger saturated adsorption while existing alone would have strong Prior adsorption tendency. In the mixed system of butyl cellusolve and triton-X-100, the prior adsorption of butyl cellusolve at toluene/water interface weakens the rigidity of interfacial film and thereby greatly reduces the emulsion stability against coalecence due to its short chain. The theoretically prediction and the experimental results are consistent.