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Authors
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Genest, S. ; Petzold, G. ; Schwarz, S.
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Title
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Removal of micro-stickies from model wastewaters of the paper industry by amphiphilic starch derivatives
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Date
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05.11.2015
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Number
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47162
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Abstract
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Biologically degradable polymers based on renewable raw materials, such as polysaccharides, represent promising alternatives to synthetic polymers used as flocculants or stabilizing agents. Polysaccharides derived from potato starch have been modified with benzyl- and additionally cationic hydroxypropyl trimethyl ammonium groups of different degrees of substitution (DS). In this work these amphiphilic starch derivatives have been used to remove substances which impact negatively the paper production process when using recycled paper, so called stickies. Model suspensions have been studied using a multitude of different measurement techniques with the aim to predict a “sticky potential” and to reduce dissolved and colloidal substances such as micro-stickies. Systematic experiments studying the interactions between the novel amphiphilic starch derivatives and the model suspension have shown that dynamic surface tension is a very suitable property to characterize the surface active compounds in the model suspension giving additional information about the sticky potential of waste water, e.g. white water and offering a new and sensitive way to describe the parameter “hydrophobicity”. Moderately cationic and hydrophobic starch derivatives proved to be the most effective ones for sticky removal.
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Publisher
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Colloids and Surfaces A: Physicochemical and Engineering Aspects
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Wikidata
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Citation
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Colloids and Surfaces A: Physicochemical and Engineering Aspects 484 (2015) 231-241
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DOI
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https://doi.org/10.1016/j.colsurfa.2015.08.002
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Tags
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amphiphilic starch sticky majuscule dynamic surface tension flocculation
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