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以二苯胺重氮盐 ( DDS)为模型化合物 ,系统考察了其在水中热分解反应与十二烷基硫酸钠 ( SDS)的浓度以及溶液中小分子电解质的关系 ,结合荧光分析结果 ,证实了 DDS及重氮树脂 ( DR)在 SDS溶液中热稳定性的提高是由于 DDS和 DR分子与 SDS分子间的疏水相互作用和静电吸引作用使它们同 SDS分子共同形成混合预胶束或胶束 ,通过预胶束或胶束的静电及极性效应使其中的 DDS和 DR分子上的重氮基得到保护 .随着 SDS浓度和小分子电解质 ( Na Cl)浓度的增加 ,进入预胶束或胶束中的 DDS和 DR的量越多 ,体系的热稳定性提高得越大 .由于 DDS和 DR在远低于 SDS的临界胶束浓度时 (≈ 1 0 - 5 mol/L)形成了预胶束 ,从而在 SDS浓度很低时即能对 DDS和 DR起明显的保护作用
Using diphenylamine diazonium salt (DDS) as the model compound, the relationship between the thermal decomposition reaction in water and the concentration of sodium dodecyl sulfate (SDS) and the small molecule electrolyte in solution were systematically investigated. The results of fluorescence analysis showed that DDS And diazoresin (DR) in the SDS solution is due to the hydrophobic interaction between DDS and DR molecules and SDS molecules and electrostatic attraction make them together with SDS molecules to form a mixed pre micelles or micelles, by Pre-micellar or micellar electrostatic and polar effects of which DDS and DR molecules on the diazo were protected with the concentration of SDS and small molecule electrolyte (Na Cl) concentration increases into the pre-micelles or micelles The greater the amount of DDS and DR, the greater the thermal stability of the system.As DDS and DR form a premicellar micelles much below the critical micelle concentration of SDS (≈10-5 mol / L) , So that when the SDS concentration is very low on DDS and DR play a significant protective effect