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Colloid and Polymer Science
Erschienen in: Colloid and Polymer Science 12/2013

01.12.2013 | Original Contribution

TEMPO-mediated oxidation of bacterial cellulose in a bromide-free system

verfasst von: Chen Lai, Shujiang Zhang, Liyuan Sheng, Shibo Liao, Tingfei Xi, Zhixiong Zhang

Erschienen in: Colloid and Polymer Science | Ausgabe 12/2013

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Abstract

A partially C6-carboxylated bacterial cellulose (BC) with a high carboxylate content was prepared in a bromide-free system by using 2,2,6,6-tetramethylpyperidine-1-oxyl (TEMPO) as a catalyst. ART-FTIR, X-ray diffraction, solid 13C-NMR, TEM analysis, and reaction kinetics measurements were performed to investigate the oxidation reaction of BC. Results show that C6 carboxylate was formed selectively on the microfiber surface without disrupting its highly ordered nanocrystalline structure. Given the extremely low accessibility of hydroxyl groups in d-anhydroglucopyranose units, the reaction can be described by second-order kinetics with very low reaction rate constants. pH exhibited a significant influence on the oxidation of BC and a higher activity at C6 was observed in a neutral medium.
Vorheriger Artikel A strategy to stabilize the confined chiral TPPS J-aggregate by ionic block copolymer
Nächster Artikel Facile fabrication of snowman-like Janus particles with asymmetric fluorescent properties via seeded emulsion polymerization

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Metadaten
Titel
TEMPO-mediated oxidation of bacterial cellulose in a bromide-free system
verfasst von
Chen Lai
Shujiang Zhang
Liyuan Sheng
Shibo Liao
Tingfei Xi
Zhixiong Zhang
Publikationsdatum
01.12.2013
Verlag
Springer Berlin Heidelberg
Erschienen in
Colloid and Polymer Science / Ausgabe 12/2013
Print ISSN: 0303-402X
Elektronische ISSN: 1435-1536
DOI
https://doi.org/10.1007/s00396-013-3033-7

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