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·2310· 精细化工 FINE CHEMICALS 第 38 卷
污布的去污力与 LAS、AOS 等传统表面活性剂的去 3 结论
污力相当,且均优于皂类的去污力。3 种椰子油酰
基氨基酸钠在 250 mg/kg 硬水中对碳黑、蛋白污布 依据绿色化学基本原则,利用天然可再生油脂
的去污力于皂类的去污力相当;与 LAS、AOS 等传 椰子油与芳香族氨基酸钠反应,制备了 3 种椰子油
统表面活性剂相比,3 种椰子油酰基氨基酸钠对 3 酰 基氨基酸 钠表面活 性剂,并 利用 FTIR 和
种污布的去污力相对于其在蒸馏水中的去污力均有 HPLC-MS 进行结构表征与组分分析,进一步丰富了
所下降,尤其是对皮脂污布的去污力,这可能与它 油脂基氨基酸的种类。通过对 3 种椰子油酰基氨基
们的耐硬水性较差有关。 酸盐(Co-His-Na、Co-Tyr-Na 与 Co-Phe-Na)的各
项性质进行评价发现,合成的 3 种表面活性剂均具
有良好的界面活性和泡沫性能、较强的乳化能力,
去污力于多种传统表面活性剂相当,耐硬水性等同
或优于皂类。此外,3 种表面活性剂的性能与芳香环
结构密切相关,Co-His-Na 氨基酸的取代基尺寸较小。
因此,其界面排布更加紧密,表现出更高的界面活
性、泡沫性能及乳化性能;Co-Tyr-Na 由于酪氨酸亲
水的酚羟基存在,其在抗硬水方面表现出较大的优势。
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