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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  • [1] Aarne N(2012)Influence of adsorbed polyelectrolytes on pore size distribution of a water-swollen biomaterial Soft Matter 8 4740-4749
  • [2] Kontturi E(1999)Influence of surface charge on viscosity behavior of cellulose microcrystal suspension J Wood Sci 45 258-261
  • [3] Laine J(2005)Effect of reaction conditions on the properties and behavior of wood cellulose nanocrystal suspensions Biomacromolecules 6 1048-1054
  • [4] Araki J(2007)Cellulose microfibril aggregates and their size variation with cell wall type Wood Sci Technol 41 443-306
  • [5] Wada M(2003)Smooth model cellulose I surfaces from nanocrystal suspensions Cellulose 10 299-65
  • [6] Kuga S(2008)The shape and size distribution of crystalline nanoparticles prepared by acid hydrolysis of native cellulose Biomacromolecules 9 57-E1203
  • [7] Okano T(2011)Nanostructure of cellulose microfibrils in spruce wood Proc Natl Acad Sci USA 108 E1195-3500
  • [8] Beck-Candanedo S(2010)Cellulose nanocrystals: chemistry, self-assembly, and applications Chem Rev 110 3479-3229
  • [9] Roman M(2014)Isolation of a novel, crystalline cellulose material from the spent liquor of cellulose nanocrystals (CNCs) Cellulose 21 3217-295
  • [10] Gray DG(2012)Dispersion of carbon nanotubes: mixing, sonication, stabilization, and composite properties Polymers 4 275-3948
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