Location: Plant Polymer ResearchTitle: Preparation of hydrophobically modified Cashew Gum through reaction with Alkyl Ketene Dimer
|FURTADO, ROSELAYNE - Embrapa|
|ALVES, CARLUCIO - Universidade Estadual Do Ceara|
Submitted to: Green Polymer Chemistry: New Products, Processes, and Applications
Publication Type: Book / Chapter
Publication Acceptance Date: 9/11/2018
Publication Date: 11/26/2018
Citation: Biswas, A., Kim, S., Buttrum, M.A., Furtado, R.F., Alves, C.R., Cheng, H.N. 2018. Preparation of hydrophobically modified Cashew Gum through reaction with Alkyl Ketene Dimer. Green Polymer Chemistry: New Products, Processes, and Applications. ACS Symposium Series. 1310:137-146.
Interpretive Summary: This work is part of our efforts to derivatize agro-based raw materials to diversify the chemical structures of these materials and to assess their properties. Since cashew gum is widely available, we have modified it with a readily available hydrophobic reagent, alkyl ketene dimer (AKD), which imparted a surfactant-like property to this polymer. The novel processes disclosed in this work will benefit industrial chemical manufacturers such as National Starch, Ingredion among others to provide bio based surfactants and hydrophobic coatings.
Technical Abstract: Hydrophobic modification of polysaccharides is useful for imparting special properties, such as viscosity improvement and additive compatibility. An interesting reagent for hydrophobic modification is alkyl ketene dimer (AKD). A brief review is given here of AKD-modified polysaccharides. In addition, new data relating to AKD-modified cashew gum are presented. Reactions have been conducted at 90 °C, using dimethyl sulfoxide as a solvent and 4-dimethylaminopyridine as a promoter. Samples with degrees of substitution (DS) up to 0.016 have been made; the higher DS samples tend to form insoluble dispersions. This new polymer shows some of the properties of other AKD-adducted polysaccharides and may be a useful addition to the family of hydrophobically modified polysaccharides.