【摘要】 通过表面张力测定和荧光发射光谱等方法,研究了聚乙烯亚胺(PEI)与非离子表面活性剂壬基酚聚氧乙烯醚(NP-15)之间的相互作用,对复配后体系的临界胶束浓度(cmc)、浊点、聚集数以及pH的变化对它们影响的测定后发现,1%PEI的加入使得NP-15的cmc稍有增加;在1%PEI/NP-15体系中,随着体系pH的降低,复配体系在cmc时的表面张力有所升高,体系的浊点依次降低。实验还发现随pH的增大,测定1%PEI/NP-15体系的微环境极性有所降低,但聚集数增加。更多还原

【Abstract】 Through surface tension measurement,fluorescence emission spectrometry and other methods, interactions between polyethylenimine(PEI) and nonionic surfactant polyoxyethylene nonylphenyl ether (NP-15) were studied.With respect to blend system of 1%PEI with NP-15 aqueous solution,the critical micelle concentration(cmc),cloud point(CP),number of aggregates as well as the effect of change of pH on the above-mentioned properties were measured and determined.Experimental results showed that,in the blend system composed of 1%PEI with NP-15 aqueous solution,the addition of 1%PEI increases the cmc slightly of NP-15.Following the decline of pH,the surface tension at the cmc increases,while the CP of the blend system decreases correspondingly.The experiment results also showed that,following the increase of pH, the micro environmental polarity of the blend system decreases,while the number of aggregates increases.更多还原