含亚砜基蛋氨酸型表面活性剂的合成及性能

Synthesis and Performance of Sulfoxide-modified Methionine Surfactants

摘要:

以蛋氨酸和长链脂肪酸为原料，合成了4种不同碳链长度的含亚砜基蛋氨酸型表面活性剂。采用FTIR、1HNMR和ESI-MS对产物结构进行了表征，并对产物的表面张力、临界胶束浓度（cmc）、乳化性能、发泡性能、硬水稳定性和抑菌性能进行了研究。结果表明这一系列的表面活性剂的最低表面张力均在25mN/m以下,临界胶束浓度小于1 g/L，且具有良好的泡沫性能和乳化性能，在硬水中的平均稳定性均在3级以上。另外，抑菌试验结果表明：产物对大肠杆菌、金黄色葡萄球菌和白色念珠菌的生长抑制作用明显,优于N-月桂酰谷氨酸。

Abstract:

Four sulfoxide-modified methionine surfactants with different carbon chain length were synthesized from long chain fatty acid and methionine as staring materials. Then, the structure of the products were characterized by means of FTIR, 1HNMR and ESI-MS, and the surface tension, critical micelle concentrations (CMC), emulsifying property, foaming property, hard water stability and antibacterial activity were investigated. The results show that the minimum surface tension of surfactant in this series are below 25 mN/m, the CMC of less than 1 g/L. Moreover, it is indicated that the four kinds of product all have good antibacterial activity against Escherichia coli, Staphylococcus aureus and Candida albicans .