Properties of phosphorylated cellulose nanofiber dispersions under various conditions

Noguchi, Yuichi; Homma, Ikue; Watanabe, Tomoki

doi:10.1007/s10570-019-02922-y

Cited by 33 publications

(22 citation statements)

References 29 publications

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“…The amounts of the first and second dissociated protons (i.e., P1 and P2, respectively, mmol/g) were determined based on the pH curve, as previously reported . Note that P1 is equal to the phosphorus content …”

Section: Methodsmentioning

confidence: 99%

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Distribution and Quantification of Diverse Functional Groups on Phosphorylated Nanocellulose Surfaces

2021

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Phosphorylated cellulose nanofiber (CNF) is attracting attention as a newly emerged CNF with high functionality. However, many structural aspects of phosphorylated CNF remain unclear. In this study, we investigated the chemical structures and distribution of ionic functional groups on the phosphorylated CNF surfaces via liquid-state nuclear magnetic resonance measurements of colloidal dispersion. In addition to the monophosphate group, polyphosphate groups and cross-linked phosphate groups were introduced in the phosphorylated CNFs. The proportion of polyphosphate groups increased as the phosphorylation time increased, reaching ∼30% of all phosphate groups. Only a small amount of cross-linked phosphate groups existed in the phosphorylated CNF after a prolonged reaction time. Furthermore, phosphorylation of cellulose using urea and phosphoric acid was found to be regioselective at the C2 and C6 positions. There existed no significant difference between the surface degrees of substitution at the C2 and C6 positions of the phosphorylated CNFs.

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Section: Methodsmentioning

confidence: 99%

“…27 Note that P1 is equal to the phosphorus content. 32 NMR Analysis. The phosphorylated CNF dispersion (0.3 wt %, 90 mL) was enzymatically hydrolyzed under the conditions of 2 h of stirring at 50 °C in the presence of 3.2 μL of endoglucanase (ECOPULP R, AB Enzymes GmbH, Germany).…”

Section: ■ Introductionmentioning

confidence: 99%

Distribution and Quantification of Diverse Functional Groups on Phosphorylated Nanocellulose Surfaces

2021

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“…These advantages make cellulose nanoparticles become an attractive nanomaterial in both academic and industrial areas. To date, several kinds of cellulose nanofibers like 2,2,6,6-tetrametylpiperidine-1-oxyl (TEMPO)-oxidized (Isogai et al, 2011 ), carboxymethylated (Im et al, 2019 ), and phosphorylated cellulose nanofibers (Noguchi et al, 2020 ) have been developed to the stages of commercial production and application.…”

Section: Introductionmentioning

confidence: 99%

Industrial-Scale Production and Applications of Bacterial Cellulose

Zhong¹

2020

Front. Bioeng. Biotechnol.

193

106

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Bacterial cellulose (BC) is a natural biomaterial synthesized by bacteria. It possesses a unique structure of cellulose nanofiber-weaved three-dimensional reticulated network that endows it excellent mechanical properties, high water holding capability and outstanding suspension stability. It is also characterized with high purity, high degree of crystallinity, great biocompatibility and biodegradability. Due to these advantages, BC has gained great attentions in both academic and industrial areas. This critical review summarizes the up-to-date development of BC production and application from an industrial perspective. Firstly, a fundamental knowledge of BC's biosynthesis, structure and properties is described, and then recent developments in the industrial fermentation of BC are introduced. Subsequently, the latest commercial applications of BC in the areas of food, personal care, household chemicals, biomedicine, textile, composite resin are summarized. Finally, a brief discussion of future development of BC industry is presented at the end.

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“…Among the more prominent cellulose derivatives are cellulose phosphates, 19 which can be obtained by chemical treatments that introduce phosphate groups onto cellulose bers. [20][21][22][23][24] This modication is an essential step in order to obtain some needed properties, which are not normally found in the original cellulose structure. Thus, phosphorylated cellulose bers have many advantageous properties that render them highly promising in many applications, such as composites, 25 ame retardant materials 3,5,[26][27][28] and lters for the removal of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

A highly efficient chemical approach to producing green phosphorylated cellulosic macromolecules

et al. 2021

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Properties of phosphorylated cellulose nanofiber dispersions under various conditions

Cited by 33 publications

References 29 publications

Distribution and Quantification of Diverse Functional Groups on Phosphorylated Nanocellulose Surfaces

Distribution and Quantification of Diverse Functional Groups on Phosphorylated Nanocellulose Surfaces

Industrial-Scale Production and Applications of Bacterial Cellulose

A highly efficient chemical approach to producing green phosphorylated cellulosic macromolecules

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