疏水缔合聚丙烯酰胺与阳离子双子表面活性剂的相互作用

Interactions between Hydrophobically Modified Polyacrylamide and Cationic Gemini Surfactant

通过表面张力法和电导率法分别考察了阳离子双子表面活性剂(12-2-12)与非离子疏水缔合聚丙烯酰胺(HMPAM)和普通聚丙烯酰胺(PAM),传统表面活性剂十二烷基三甲基溴化铵(DTAB)与HMPAM和PAM之间的相互作用。结果表明,12-2-12+HMPAM复合体系与12-2-12水溶液体系相比,在w(聚合物含量)<CMC(临界胶团浓度)时,复合体系的表面张力(γ)具有升高的趋势,且γ随着w的增大升高的趋势越明显;在w>CMC时,复合体系的电导率(κ)具有下降的趋势,且κ随着w的增大下降的趋势越明显,说明12-2-12与HMPAM之间存在相互作用。

Interactions between a cationic gemini surfactant, 1,2-ethane bis （ dimethyldodecylammonium bromide） （ designated as 12-2-12） with hydrophobically modified polyacrylamide （HMPAM） and nonionic polyacrylamide（PAM）, were investigated by means of surface tension and conductivity. It was found that, compared with pure surfactant solution, when w （ content of polymer） 〈 CMC （ con- centration of critical lump scrap）, the surface tension of complex system＂ 12-2-12 ＋ HMPAM＂ has an elevatory trend which increases with w increasing when w 〉 CMC, the electrical conductivity of the mixed system ＂12-2-12 ＋ HMPAM＂ has an degressive trend which decreases with w increasing. This favors that the mixed system of 12-2-12 ＋ HMPAM has a stronger interaction.