【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(CnMSO)。通过FTIR、1HNMR和ESI-MS表征了产物的结构,并对该系列表面活性剂的表面张力、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测定。结果表明,该系列的表面活性剂的最低表面张力(γCMC)为21~24 m N/m,临界胶束浓度为0.15~1.5 mmol/L,在硬水中的平均稳定性均在3级以上,具有良好的泡沫性能和乳化性能。另外,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,抑菌性优于N-月桂酰谷氨酸(C12G)。更多还原

【Abstract】 Four sulfoxide-modified methionine surfactants with different carbon chain length were synthesized from long chain fatty acid and methionine,and the structures of the products were characterized by means of FTIR,1HNMR and ESI-MS. The surface tension,critical micelle concentrations( CMC),emulsifying property,foaming property,hard water stability and antibacterial activity were investigated. The results show that the surface tension( γCMC) varied within the range of21 ~ 24 m N / m,critical micelle concentrations( CMC) varied within the range of 0. 15 ~ 1. 5 mmol / L,they perform good emulsifying property and foaming property. Besides,they have certain antibacterial property.更多还原