不同R_4基团的VES-N结构与性能关系

Relationship Between the Structure and Performance of Viscoelastic Surfactant

合成了4种粘弹性表面活性剂(N-烷基-N,N-双(2-羟乙基)十八烷基溴化铵)。采用扫描电子显微镜观察了表面结构。研究了C18H37N+(CH2CH2OH)2R4Br-中不同R4基团对表面活性剂cmc的影响。结果表明,随着R4基团中C原子数的增加,表面活性剂的表面活性有所提高,可达1.87 mmol/L,其抗温性和粘弹性随着R4基团中C原子数的增加而增大,其稠度系数增加1.7倍。

Four viscoelastic surfactants（N-alkyl-N,N-hydroxyethyl octadecyl bromine ammonium） were synthesized.SEM was used to analyze the structure of the four surfactants.The influence of R4 on cmc was studied.The more the number of carbons in R4,the higher the surface activity of the surfactant,the higher the viscoelasticity,and the higher the temperature resistance.The cmc can reach 1.87 mmol/L,and the consistency coefficient increased by a factor of 1.7.