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- W2023930068 abstract "The physicochemical properties (viscosity, surface tension, zeta potential, size measurement) of Pullulan, DEAE-Pullulan (DS0 = 0.8) (DS0 is the degree of substitution of total nitrogen groups per anhydroglucose units (AGU)) and the alkylated derivatives Y-Cx-DEAE-Pullulan (Y = 100 DSCx (DSCx: the number of alkyl groups per anhydroglucose units) Y is equal to 44 and 42 for C10 and C12, respectively) were studied in aqueous salt-free solutions at pH 3, 8 and 11. For the DEAE-Pullulan a strong polyelectrolyte character at pH values below 8 was found, which, despite the presence of a sizeable fraction of permanent cationic charges due to a side chemical reaction (Hoffmann addition), evolved to a marked amphiphilic behavior in alkaline media. Alkylated DEAE-Pullulan derivatives (44% of C10 and 42% of C12) are strongly amphiphilic regardless of the pH. The low intrinsic viscosity (Fuoss and Fedors models) values confirmed the degradation of cationic amphiphilic pullulan derivatives." @default.
- W2023930068 created "2016-06-24" @default.
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- W2023930068 date "2010-03-01" @default.
- W2023930068 modified "2023-10-16" @default.
- W2023930068 title "Novel cationic and amphiphilic pullulan derivatives II: pH dependant physicochemical properties" @default.
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- W2023930068 doi "https://doi.org/10.1016/j.carbpol.2009.11.003" @default.
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