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通过静态表面张力测试技术(吊环法)研究4个与8个环氧丙烷(PO)平均聚合数的聚氧丙烯醚季铵盐(PO-4QA和PO-8QA)水溶液的表面性质。通过动态光散射技术及透射电镜技术研究PO-4QA和PO-8QA分子在水中的聚集行为。结果表明:两种聚氧丙烯醚季铵盐具有较强的气/液界面活性;PO-4QA表面活性剂水溶液中有球状聚集体形成,粒径分布呈双峰,而PO-8QA表面活性剂分子在水中能聚集形成囊泡。
The surface properties of aqueous solutions of polyoxypropylene ether quaternary ammonium salts (PO-4QA and PO-8QA) having an average polymerization number of 4 and 8 propylene oxide (PO) were investigated by the static surface tension test technique (Lifting Ring Method). The aggregation behavior of PO-4QA and PO-8QA in water was studied by dynamic light scattering and transmission electron microscopy. The results showed that the two kinds of polyoxypropylene ether quaternary ammonium salt had strong gas / liquid interface activity. The spherical aggregates were formed in the aqueous solution of PO-4QA surfactant, and the particle size distribution was bimodal. However, PO-8QA surfactant Molecules in the water can gather to form vesicles.