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Regioselective palladium-catalysed aerobic oxidation of dextran and its use as a bio-based binder in paperboard coatings.

ABSTRACT: The coatings industry is aiming to replace petrochemical-based binders in products such as paints and lacquers with bio-based alternatives. Native polysaccharide additives are already used, especially as adhesives, and here we show the use of oxidised dextran as a bio-based binder additive. Linear dextran with a molecular weight of 6 kDa was aerobically oxidised in water at the C3-position of its glucose units, catalysed by [(neocuproine)PdOAc]2(OTf)2. The resulting keto-dextran with different oxidation degrees was studied using adipic dihydrazide as a crosslinker in combination with the commercial petrochemical-based binder Joncryl®. Coating experiments show that part of the Joncryl® can be replaced by keto-dextran while maintaining the desired performance.

SUBMITTER: Maßmann SC 

PROVIDER: S-EPMC10986772 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature

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Regioselective palladium-catalysed aerobic oxidation of dextran and its use as a bio-based binder in paperboard coatings.

Maßmann Sarina C SC   Metselaar Gerald A GA   van Dijken Derk Jan DJ   van den Berg Keimpe J KJ   Witte Martin D MD   Minnaard Adriaan J AJ  

Green chemistry : an international journal and green chemistry resource : GC 20240223 7

The coatings industry is aiming to replace petrochemical-based binders in products such as paints and lacquers with bio-based alternatives. Native polysaccharide additives are already used, especially as adhesives, and here we show the use of oxidised dextran as a bio-based binder additive. Linear dextran with a molecular weight of 6 kDa was aerobically oxidised in water at the C3-position of its glucose units, catalysed by [(neocuproine)PdOAc]<sub>2</sub>(OTf)<sub>2</sub>. The resulting keto-de  ...[more]

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