Journal
POLYMERS
Volume 13, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/polym13020291
Keywords
alkyl ketene dimer; alkenyl succinic anhydride; hydrophobic modification; octenyl succinic anhydride; tetrapropenyl succinic anhydride; xylan
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Xylan, a major type of hemicellulose, has been successfully derivatized to produce hydrophobically modified derivatives with confirmed structures. These xylan derivatives increase the structural diversity of xylan, providing more options for developing new applications.
Xylan is a major type of hemicellulose that has attracted a lot of research and development activities. It is often derivatized in order to improve its properties. In the literature, hydrophobic modification of polymers is often used to produce surfactant-like materials and associative thickeners. In this work, we have derivatized xylan with alkyl ketene dimer (AKD) and two types of alkenyl succinic anhydrides (ASAs). The xylan-AKD derivatives have been made at 90 degrees C, using dimethyl sulfoxide as solvent and 4-dimethylaminopyridine as promoter. Samples with degrees of substitution (DS) up to 0.006 have been produced. The xylan-ASA derivatives have been synthesized at 120 degrees C in dimethyl sulfoxide with DS up to 0.105-0.135. The structures of these products have been confirmed with NMR and FT-IR. These xylan derivatives increase the structural diversity of xylan and provide additional options for people seeking to use hydrophobically modified polysaccharides in their applications.
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