Recoverable acrylamide-vinylamine copolymer immobilized TEMPO mediated oxidation of cellulose with good catalytic performance and low cellulose degradation

In this work, a recoverable acrylamide-vinylamine copolymer immobilized TEMPO [P(AM-co-VAm)-T] catalyst for selective oxidation of cellulose with good catalytic performance and low degradation was developed. Firstly, the [P(AM-co-VAm)] prepared by Hofmann polyacrylamide (PAM). Then, condensation reduction reaction between amine groups P(AM-co-VAm) carbonyl 4-oxo-TEMPO yielded P(AM-co-VAm)-T. P(AM-co-VAm)-T used as C6 primary hydroxyl to carboxyl groups. The content obtained oxidized up 1.114 mmol/g, which equivalent 76% free level. This macromolecular easily recycled recycling excellent. Interestingly, it found that could effectively reduce cellulose. corresponding degree 21–27%, much lower than (61–66%) other catalysts, such polyacrylic acid immobilized-TEMPO (41–53%) polyamidoamine supported (28–44%). positive charge suitable size inhibit formation aldehydes C2/C3 ketones, main reason significantly degradation.