【摘要】 以窄分布十二醇聚氧乙烯(2)醚(AEO2)为原料经羧甲基化法合成了窄分布十二醇醚(2)羧酸钠盐(AE2C),经单因素实验对反应温度、投料比及反应时间等参数进行探讨,得出最佳的合成工艺条件为:n(AEO2)∶n(ClCH2COOH)∶n(NaOH)=1.0∶1.1∶2.2,反应温度70℃,反应时间5 h.经分离提纯后对产品进行红外结构表征和活性含量测定,并对其表面张力、泡沫性、润湿性、乳化性、钙皂分散力和去污力进行了测试.结果表明,合成的AE2C阴离子活性含量为87.38%,CMC为0.41 mmol/L,最低表面张力为25.4 mN/m,泡沫性(0.1%溶液)83 mL、润湿性(0.1%溶液)5.1 s、乳化性(液体石蜡)131.8 s、钙皂分散力LSDP 16和去污力(0.25%溶液)47.2%.更多还原

【Abstract】 Lauryl polyoxyethylene ether carboxylate with narrow molecular weight distribution( AE2C) was synthesized by using AEO2 with narrow molecular weight distribution as a starting material and the optimized reaction conditions were shown as follows: n( fatty alcohol ether) ∶n( sodium chloroacetate) ∶n( sodium hydroxide) = 1. 0∶1. 1∶2. 2,the reactive temperature 70 ℃,and the reactive time 5 h. The structure of the product was identified by IR and the anion active contents was determined. The properties of the product such as surface activity,foaming,wetting,emulsifying,washing properties and calcium soap dispersion were measured. The results showed that anion active content of AE2 C is 87. 38%,CMC of the product is 0. 41 mmol /L,and γCMCis 25. 4 mN /m,and the foaming hight is 83 mL,wetting properties is 5. 1 s,emulsifying abilities is 131. 8 s,LSDP is 16,and the washing properties is 47. 2%.更多还原