Cellulose acetate-poly{[9,9-bis(6′-N,N,N-trimethylammonium)hexyl]fluorene-phenylene} bromide blends: Preparation, characterization and transport properties

The preparation of cellulose acetate-poly-(9,9-bis(6′-N,N,N-trimethylammonium)-hexyl-fluorene phenylene) bromide (HTMA-PFP) blend films by solvent casting from a dispersion is reported. Films were characterized by UV-visible spectroscopy, SEM, electrical conductivity, TGA and DSC. It was found that morphological and physical chemical properties of blends were dependent both on the solvent and the degree of polymerization of cellulose acetate. The fluorescence properties of different blends were evaluated by fluorescence microscopy and it was shown that they are dependent on the structural properties of the blend as well as the aggregation level of the polyfluorene. Release kinetics of HTMA-PFP, incorporated into blend films, in SDS aqueous solutions have been studied and are discussed on the basis of the Korsmeyer-Peppas equation.

► Blend films of cellulose acetate and a conjugated polyelectrolyte (HTMA-PFP) were prepared. ► The effect of solvent and degree of substitution of cellulose acetate on blend properties was investigated. ► Depending on the solvent, HTMA-PFP shows different aggregation degrees inside blend matrix. ► Desorption of HTMA-PFP can be controlled by using sodium dodecyl sulfate.