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Effect of KBr on the micellar properties of CTAB

机译:KBr对CTAB胶束性能的影响

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摘要

The effect of KBr on the size, shape and microviscosity of CTAB micelles has been investigated by means of laser light scattering (LLS), H NMR measurements and fluorescence probe. The data obtained from the various techniques are quantitatively in agreement. The R_h of micelles in 0.01 mol. L~-1 CTAB solution increases from 3.5 nm to 43 nm and R_g increases to 89 nm with addition fo KBr salt. In this process, both the microviscosity and molecular weight of micelles M_w have noticeable increases, too. The rod-like micelles are formed at 0.1 mol. L~-1 KBr and the worm-like micelles are formed at above 0.2 mol. L~-1 KBr.
机译:通过激光散射(LLS),1 H NMR测量和荧光探针研究了KBr对CTAB胶束的大小,形状和微粘度的影响。从各种技术获得的数据在数量上是一致的。胶束的R_h为0.01 mol。加入KBr盐后,L〜-1 CTAB溶液从3.5 nm增加到43 nm,R_g增加到89 nm。在该过程中,胶束M_w的微粘度和分子量也都显着增加。棒状胶束以0.1摩尔形成。 L〜-1 KBr和蠕虫状胶束在0.2 mol以上形成。 L〜-1 KBr。

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