Abstract Industrially relevant, commercially available cationic starches from different sources (potato, pea, corn) which feature rather low degrees of substitution ranging from 0.030 to 0.062 have been studied towards their behavior with cellulose thin films. Surface plasmon resonance spectroscopy under flow conditions using concentrations of 1.0 mg ml-1 and a flow rate of 25 ml min-1 was employed and revealed that all the investigated starches employed in this study were capable to efficiently interact with the slightly negatively charged cellulose surface leading to their irreversible deposition on the surface. As complementary techniques atomic force microscopy and x-ray photoelectron spectroscopy were used to confirm the presence of the starches on the cellulose film surface. Further, dynamic light scattering and size exclusion chromatography measurements were performed to correlate adsorbed amount, particle size and molecular weight of the starches to their interaction behavior.

Industrially relevant cationic starches: Interaction with cellulose thin films

255th National Meeting (2018)

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