Influence of the quality of microcrystalline cellulose on the outcome of TEMPO-mediated oxidation

被引：0
作者：
Reeta Salminen
Mehedi Reza
Kari Vanhatalo
Eero Kontturi
机构：
[1] Aalto University,Department of Bioproducts and Biosystems
[2] Department of Applied Physics,undefined
来源：
Cellulose | 2017年 / 24卷
关键词：
Cellulose nanocrystals; Cellulose oxidation; Porosity; Microcrystalline cellulose; Thermoporosimetry;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In an attempt to prepare cellulose nanocrystals (CNCs) by TEMPO-mediated oxidation of microcrystalline cellulose (MCC), a new species of MCC called AaltoCell was placed under scrutiny. Unlike Avicel, AaltoCell is a never-dried species, still containing ca. 10% xylan in its structure. According to thermoporosimetry, the pore size distributions of AaltoCell and Avicel did not differ from each other but after TEMPO-oxidation, AaltoCell exhibited a far lower degree of porosity, hypothetically ascribed to its hemicellulose content. Surprisingly, the charge density imposed by TEMPO-oxidation did not vary between AaltoCell and Avicel despite the different microfibril widths observed, respectively. After TEMPO-oxidation and centrifugation the fine fraction share, indicating the CNC yield, was not more than 11% for AaltoCell, compared to 20% from Avicel.
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页码：5697 / 5704
页数：7
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