双酯基Gemini季铵盐柔软剂的制备及性能

Preparation of two ester-containing Gemini quaternary ammonium softener and its properties

以二甲基硬脂酸乙酯基叔胺和1,3-二氯-2-丙醇为原料,合成了一种双酯基Gemini季铵盐织物柔软剂(DEGQS)。通过正交试验考察了反应的影响因素,确定优化工艺条件为:n(1,3-二氯-2-丙醇)∶n(二甲基硬脂酸乙酯基叔胺)=1∶2.1,反应温度80℃,W(乙醇)=40%(占反应物总量的质量分数),反应时间12 h,在该条件下目标产物的收率达到89.3%。通过FTIR、元素分析和1H-NMR对DEGQS进行表征,并研究其应用性能,结果表明,该柔软剂的表面张力35.9 mN/m,临界胶束浓度0.039 mmol/L,Krafft点为-3.41℃,表面活性较好,柔软性能与D1821基本相当,具有优良的再润湿性和生物降解性能,对织物的白度影响较小。

A di-ester Gemini quaternary ammonium softener（DEGQS） is prepared with dimethyl stearic acid ethyl tertiary amine and 1,3-dichloro-2-propanol as raw materials. The optimum synthesis conditions are determined via orthogonal experiments as follows： reaction at 80℃; for 12 hours with n（ 1,3-dichloro-2-propanol ） ： n （ dimethyl stearic acid ethyl tertiary amine） = 1 ： 2.1 and ethanol of 40%, and the yield reaches 89.3%. The product is characterized by FTIR, elemental analysis and ^1H-NMR, and its application properties are studied. The results show that the product features good surface activity with surface tension of 35.9 mN/m, critical micelle concentration of 0.039 mmol/L and Krafft point of -3.41 ℃, good softening property similar to that of commercial softener D1821, and good rewetting property and biodegradability, as well as low influence on whiteness of the fabric.