TEMPO-mediated surface oxidation of cellulose nanocrystals (CNCs)

被引：94

作者：

Fraschini, Carole ^{[1
]}

Chauve, Gregory ^{[1
]}

Bouchard, Jean ^{[1
]}

机构：

[1] FPInnovations, Cellulos Biomat Dept, 570 Blvd St Jean, Pointe Claire, PQ H9R 3J9, Canada

来源：

CELLULOSE | 2017年 / 24卷 / 07期

关键词：

Cellulose nanocrystals; CNCs; Oxidation; TEMPO; Kinetics; Surface functionalization; PRIMARY ALCOHOL GROUPS; SELECTIVE OXIDATION; NATIVE CELLULOSE; IONIC-STRENGTH; POLYSACCHARIDES; ACID; MICROFIBRILS; SUSPENSION; FRACTIONS; OXYGEN;

D O I：

10.1007/s10570-017-1319-5

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Cellulose nanocrystals were successfully oxidized with sodium hypochlorite using catalytic amounts of sodium bromide and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radical at pH 10 in water. Carboxylate groups were selectively introduced at the surface of the crystals up to a total acid content of 1200 mmol kg(-1) without damaging the integrity of the crystals. The final acid content can easily be tuned by varying the amount of oxidant introduced. The effect of temperature, the quantity of oxidant and co-catalyst on the reaction kinetics were studied. Several methods were used for the characterization of the oxidized material like field emission scanning electron microscopy, diffuse reflectance infrared spectroscopy and thermogravimetric analysis.

引用

页码：2775 / 2790

页数：16

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