Role of isomers and steric hindrance in the micellization of carboxylated carbosilane surfactants
作者:Tianquan Wu、Hailong Liu、Jinglin Tan
DOI:10.1002/jsde.12744
日期:——
carbosilane surfactants with methyl, ethyl, branching CH3, phenyl, and cyclohexyl (Me‐Si2C‐COONa, Et‐Si2C‐COONa, Si2C‐La‐COONa, Ph‐Si2C‐COONa, and Cy‐Si2C‐COONa) were prepared. The effect of isomer and steric hindrance on their micellization in aqueous solution was investigated by surface tension, conductivity, transmission electron microscopy (TEM) and dynamic light scattering (DLS). Si2C‐La‐COONa with branching
一系列带有甲基、乙基、支链CH的羧化碳硅烷表面活性剂3、苯基和环己基(Me-Si2C-COONa、Et-Si2C-COONa, Si2C-La-COONa、Ph-Si2C-COONa 和 Cy-Si2C-COONa) 已制备。通过表面张力、电导率、透射电子显微镜(TEM)和动态光散射(DLS)研究了异构体和空间位阻对其在水溶液中胶束化的影响。硅2具有支链 CH 的 C-La-COONa3 显示较低的 γ羧甲基纤维素钠与 Et-Si 相比,CMC 值更高2C-COONa。氰硅2带有环己基的 C-COONa (41.6 mN m−1) 和 Ph-Si2C-COONa 与苯基 (43.9 mN m−1) 有较大的 γ羧甲基纤维素钠由于独特的空间位阻和疏水性而产生的值。在水溶液中,Si的聚集行为2C-La-COONa、Cy-Si2C-COONa 和 Ph-Si2C-COONa 是焓驱动的。然而,Me-Si