摘要
十二胺与缩水甘油在碱催化下合成了不同聚合度的十二胺聚甘油醚表面活性剂,并以FTIR、ESI-MS、13CNMR进行了合成产品的光谱表征。用吊环法测定了该表面活性剂水溶液在25℃时的表面张力,考察了不同聚合度对其表面性质的影响。结果表明,十二胺二聚甘油醚、四聚甘油醚、六聚甘油醚水溶液的临界胶束浓度CMC(mmol/L)分别为0.32、0.055和0.20,先减小而后增大;最低表面张力γCMC(mN/m)分别为28.46、29.41和34.02,逐渐增大。
In the presence of base catalyst,polyglyceryl dodecylamine surfactants with different polymeric degrees were synthesized from dodecylamine and glycidol. The structures of the target products were characterized by FTIR,ESI-MS and ^13CNMR. The surface tensions and critical mieelle concentrations （cmc） of dilute aqueous solutions of these surfactants were measured at 25℃ by DuNouy Ring method in order to investigate the effect of the different polymeric degrees on surface chemical properties. These results indicate that the values of cmc （mmol/L） were respectively 0.32, 0. 055 and 0. 20. γCMC （mN/m） were respectively 28. 46, 29. 41 and 34. 02, which increases as polymerization degree increases.
出处
《光谱实验室》
CAS
CSCD
北大核心
2009年第6期1605-1608,共4页
Chinese Journal of Spectroscopy Laboratory
