AbstractSodium α‐sulfonated, fatty acid polyethylene glycol monoesters [CmH2m+1CH(SO3Na)COO(C2H4O)nH] and diesters [CmH2m+1CH(SO3Na)COO(C2H4O)nCOCH(SO3Na)CmH2m+1], wherem=10–16 andn=1–35, were prepared by esterification of α‐sulfonated, fatty acids with polyethylene glycols, followed by neutralization with NaOH. Crude products were purified by reversed‐phase column chromatography on an octadecyl‐modified silica gel. Characteristic solution behavior of these α‐sulfonated fatty acid esters was, examined, and the following features were observed. All monoesters prepared in this work had Krafft points below 0°C and also possessed good calcium stabilities. Critical micelle concentrations of the monoesters increased monotonously, as a rule, with an increase in the number of oxyethylene units. These results suggest that the polyethylene glycol residue of the monoester behaves as a hydrophile. On the other hand, diesters possessed high water solubility, low foamability, and critical micelle concentrations that were lower by a factor of ten compared to those of the monoesters.
摘要α-磺化脂肪酸聚乙二醇单酯[CmH2m+1CH(SO3Na)COO(C2H4O)nH]和二酯[CmH2m+1CH(SO3Na)COO(C2H4O)nCOCH(SO3Na)CmH2m+1]、其中,m=10-16,n=1-35,是由α-磺化脂肪酸与聚乙二醇酯化,然后用 NaOH 中和制备的。粗产物在十八烷基改性硅胶上通过反相柱色谱法纯化。对这些 α-磺化脂肪酸酯的溶液特性进行了研究,发现它们具有以下特点。本研究制备的所有单酯的克拉夫特点均低于 0°C,并具有良好的钙稳定性。单酯的临界胶束浓度通常随着氧乙烯单元数量的增加而单调增加。这些结果表明,单酯的聚乙二醇残基具有亲水性。另一方面,二酯具有高水溶性、低发泡性,临界胶束浓度比单酯低十倍。