摘要
以红薯淀粉烷基多苷、柠檬酸为原料,在三元酸的催化作用下通过酯化和中和反应合成了阴离子表面活性剂烷基多苷柠檬酸酯盐(APG-EC)。考察了合成工艺条件,其较佳工艺条件为:m(红薯淀粉烷基多苷):m(柠檬酸)=4∶1,真空度0.040 MPa,反应温度115℃,催化剂用量(为相对于淀粉烷基多苷中试产品和柠檬酸质量和的质量分数)1.0%。通过红外光谱分析确定了产物结构,并对物化性能进行了测定。结果表明:APG-EC的γcmc=31.9 mN/m,cmc=5×10-3g/L,HLB=18,在硬水中的平均稳定性以及差示稳定性分别为5和5 5 5。与红薯淀粉烷基多苷的性能进行对比,其抗硬水稳定性明显增强。
By using the alkyl polyglycoside of sweet potato starch and citric acid as the starting materials,a kind of anion surfactant alkyl polyglycoside citric acid ester salt（APG-EC） was synthesized through esterification and neutralization reaction over supported three unified acid by catalyst. The optimum conditions were as follows ： m（alkyl polyglycoside of sweet potato starch） ：m（citric acid）=4 ： 1 ,the degree of vacuum is 0. 040 MPa,the reaction temperature is115℃ ,dosage of catalyst is 1.0%. The structure of APG-EC was characterized by IR spectrum. Physico-chemical properties of APG-EC were measured. The results showed that the critical surface tention （γcmc）of APG-EC is 31.9 mN/m. The critical micelle concentration of APG-EC is 5×10^-3 g/L. The hydrophile lipcphile balance is 18. The average stability is 5 and difference show stability is ^-5^-5^-5 in hard water. Properties were compared with the alkyl polyglycoside of sweet potato starch. It showed that the stability in hard water boosted up clearly.
出处
《化工科技》
CAS
2009年第4期1-4,共4页
Science & Technology in Chemical Industry
基金
甘肃省攻关项目(2GSO52-A41-005-03)
