窄分布十二醇醚(2)羧酸钠盐的合成及性能

Synthesis and Properties of Lauryl Polyoxyethylene Ether Carboxylate with Narrow Molecular Weight Distribution

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%.

Lauryl polyoxyethylene ether carboxylate with narrow molecular weight distribution （ AE2 C） was synthe-sized by using AEO 2 with narrow molecular weight distribution as a starting material and the optimized reaction condi -tions 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, emul-sifying, 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, andγCMC is 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%.