SDS-MWCNT dispersions

Note that UV-Vis spectroscopy can be used in exactly the same way to monitor the debundling of MWCNTs in an aqueous surfactant solution of SDS-MWCNT dispersions. The procedure described can be directly adapted to the study of systems containing MWCNTs [see Figure 3.11]. ... 

Figure 3.11, which has been already discussed, presents the UV-Vis absorption of SDS-MWCNT dispersions, all initially possessing different concentrations during ultrasonication (0.01-1.5 wt%], but diluted to the same MWCNTs prior to UV-Vis measurement. 

Figure 3.12 shows the plateau value of the absorbance at the end of the debundling of two different SDS-MWCNT dispersions, for which the CNT concentrations range from 0.05 wt% to 1.5 wt%, plotted as a function of the CNT concentration. For all the SDS-CNT dispersions, the UV-Vis absorbance was constant as long as the CNT concentration was kept below a critical concentration, being equal to 1.5 wt% for the batch MWA P041206 (open circles, batch 2) and... 

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