壬基酚聚氧乙烯醚二聚和三聚表面活性剂的合成及表面性质

合成了系列壬基酚聚氧乙烯醚二聚表面活性剂(DNP)和三聚表面活性剂(TNP), 用核磁共振、红外光谱和元素分析等手段对其结构进行了表征, 并用表面张力法和稳态荧光法对DNP和TNP的表面性能进行了研究. 结果表明, 随着氧乙烯(EO)单元数的增长, DNP和TNP的临界胶束浓度(cmc)值逐渐增大; DNP和TNP的cmc值较相应的单体壬基酚聚氧乙烯醚表面活性剂(NP)明显降低, 显示了较高的表面活性、吸附能力和润湿能力.

Synthesis and Surface Properties of Nonylphenol Polyoxyethylene Dimeric and Trimeric Nonionic Surfactants

To investigate surface properties of oligomeric surfactants, a series of dimeric and trimeric nonionic surfactants of nonylphenol polyoxyethylene ether(DNP and TNP) were synthesized and characterized by 1H NNR, FTIR and elemental analysis. Surface properties of the DNP and TNP were determined by surface tension method and steady-state fluorescence method, respectively. The experimental results show that critical micelle concentration(cmc) increase with the increasing of oxyethylene(EO) units of the DNP and TNP. The cmc of the DNP and TNP are obviously smaller than that of nonionic surfactant of nonylphenol polyoxyethylene ether(NP), which has exhibited predominant surface activities, adsorption affinities and wet abilities of the DNP and TNP.