氨基葡萄糖辛酸盐的合成与性能研究

Synthesis and Properties of Glucosamine Caprylate

氨基葡萄糖盐酸盐与三乙胺在乙醇-水相反应条件下生成氨基葡萄糖(GA),再与辛酸反应,合成了一种氨基葡萄糖为反离子的脂肪羧酸盐表面活性剂氨基葡萄糖辛酸盐(GAC)。采用红外光谱和N元素含量分析对GAC进行了结构表征,并测试了其表面性能。结果表明:25℃下,GAC的CMC值为1.09×10-3mol/L,γCMC为35.3 mN/m,Γmax为1.09×10-10mol.cm-2,Amin为0.32 nm2;GAC具有一定的泡沫性能,并对液体石蜡具有较好的乳化能力;与十二烷基二甲基甜菜碱(BS-12)、Tween 80和十六烷基三甲基氯化铵(1631)等助剂配伍良好,无分层现象。

One kind of aliphatic carboxylate surfactant glucosamine caprylate（GAC） was prepared by caprylic acid reacted with glucosamine（GA） which was prepared by glucosamine hydrochloride（GAH） and triethylamine.The structure of GAC was characterized by infrared spectroscopic（IR） and elementary analysis.The surface activities of GAC were measured at 25℃.Results show that the critical micelle concentration（CMC） of GAC is 1.09×10-3 mol/L,surface tension（γCMC） is 35.3 mN/m,saturated adsorption（Γmax） is 1.09×10-10 mol·cm-2,and saturation adsorption area（Amin） is 0.32nm2.GAC possesses certain foamability,good emulsifying ability to liquid paraffin and good compatibility with dodecyl dimethyl betaine（BS-12）,Tween 80,hexadecyl trimethyl ammonium chloride（1631） under experimental conditions.