聚(丙烯酰胺/丙烯酸钠/N,N-二辛基丙烯酰胺)与表面活性剂的相互作用

Interactions between P(AM/NaAA/DiC_8AM)and surfactants

利用粘度法研究了孪尾疏水缔合水溶性聚(丙烯酰胺/丙烯酸钠/N,N-二辛基丙烯酰胺)[P(AM/NaAA/D iC8AM)]与表面活性剂十二烷基硫酸钠(SDS)、十六烷基三甲基溴化铵(CTAB)、壬基酚聚氧乙烯醚(OP-10)的相互作用。研究表明SDS、CTAB的加入,能显著地降低P(AM/NaAA/D iC8AM)水溶液的临界缔合浓度。表明P(AM/NaAA/D iC8AM)与SDS、CTAB的疏水缔合作用较强,而与OP-10的疏水缔合作用较弱。

The influences of sodium dodecyl sulfate （SDS）, cetyl trimethylammonium bromide （CTAB）, and nonyl phenol polyethyleneoxy ether（ OP- 10）on the aqueous solution viscosity behaviors of the twin -tailed hydrophobically associating water- soluble poly（acrylamide/sodium acrylate/dioctylacrylamide） P（AM/NaAA/DiC8AM） had been examined. When ρ（SDS） = 0 - 0.07g/dL or ρ （CTAB） =0 -0.022g/dL,the aqueous solution apparent viscosity of P（AM/NaAA/DiC8AM） increased rapidly with addition of SDS or CTAB till reached to maximum value ,and then decreased with further addition of SDS or CTAB. When ρ（ OP - 10） =0 - 0. 07g/dL,the aqueous solution apparent viscosity of P（AM/NaAA/DiC8AM） changed a little with addition of OP - 10. When ρ （SDS） =0. 03g/dL, the critical associating concentration （CAC） were about 0. 17g/dL; when ρ（SDS） = 0. 02g/dL or ρ（CTAB） = 0. 005g/dL,the CAC were about 0. 12g/dL. It showed that the CAC of the P（AM/NaAA/DiC8AM） ,which was about 0. 36g/dL, could be remarkably debased with addition of SDS or CTAB： The results showed that the interactions of P（AM/NaAA/DiC8AM） with either SOD or CTAB were very strong. But the interaction of P（AM/NaAA/DiC8AM） was OP - 10 was rather weak.