Abstract In this paper, oleic acid was used as raw material to synthesize 9,10-di-hydroxystearic acid (DHSA), which contains two hydroxyl groups and one carboxyl group. DHSA was reacted with ethylene oxide (EO) to obtain a new surfactant category that is characterized by the presence of 3 hydrophilic chains: 9,10-di-hydroxystearic acid ethoxylates (DHSAE-n, n = 10, 12, 15, 18, 20 EO). FT-IR and 1H NMR were used to characterize the molecular structure of DHSAE-n. The surface activity, adsorption and aggregation behavior in aqueous solution have been investigated by static surface tension, dynamic surface tension, contact angle and transmission electron microscopy (TEM). In addition, the application properties (wettability, emulsification, foamability and decontamination) of DHSAE-n have been systematically studied.

中文翻译：

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9,10-二羟基硬脂酸乙氧基化物的合成及性质

摘要 本文以油酸为原料合成了含有2个羟基和1个羧基的9,10-二羟基硬脂酸(DHSA)。DHSA 与环氧乙烷 (EO) 反应得到一种新的表面活性剂类别，其特征是存在 3 个亲水链：9,10-二羟基硬脂酸乙氧基化物（DHSAE-n，n = 10, 12, 15, 18, 20 EO)。FT-IR 和 1H NMR 用于表征 DHSAE-n 的分子结构。通过静态表面张力、动态表面张力、接触角和透射电子显微镜（TEM）研究了水溶液中的表面活性、吸附和聚集行为。此外，系统研究了DHSAE-n的应用性能（润湿性、乳化性、发泡性和去污性）。