P(AM/NaAA/DiAC_n)与十二烷基硫酸钠的相互作用

以芘为荧光探针,用稳态荧光光谱法、粘度法研究了疏水缔合水溶性聚合物聚(丙烯酰胺/丙烯酸钠/N,N-双烯丙基N-烷基胺)P(AM/NaAA/D iACn)(n=12,14,16)]与阴离子型表面活性剂十二烷基硫酸钠(SDS)的疏水缔合行为。随SDS浓度的增加,I1/I3比值不断减小,得到SDS的临界胶束浓度(cm c)约为8×10-8mol/L。水溶液的表观粘度随SDS质量浓度的增加急剧上升,超过一定浓度后又急剧下降;粘度增加的幅度随疏水链长度增加。结果表明,P(AM/NaAA/D iACn)与SDS可形成混合胶束,发生较强的疏水缔合作用。

Interactions between P(AM/NaAA/DiACn) and sodium dodecyl sulfate

The hydrophobic association behaviors had been examined between hydrophobically associating water-soluble polymers poly(acrylamide/sodium acrylate/N,N-diallyl-N-alkylamine) P(AM/NaAA/DiACn)(n=12,14,16)] and anion surfactant sodium dodecyl sulfate(SDS) with pyrene as fluorescene probe and viscosimetric method.The results showed that with increasing of SDS,I1/I3 values decreased.The critical aggregate concentration(cmc) of SDS was about 8×10-8 mol/L.The viscosity of the polymers increased rapidly with addition of SDS and reached maximum value,then decreased with further addition of SDS.Furthermore,the mixed solution apparent viscosity of P(AM/NaAA/DiACn)/SDS increased with the increasing of side chain length.It was showed that strong association between P(AM/NaAA/DiACn) and SDS occurred through the formation of mixed micelled.