A comparison study on the preparation of nanocellulose fibrils from fibers and parenchymal cells in bamboo (Phyllostachys pubescens)

Wang, Hankun; Zhang, Xuexia; Jiang, Zehui; Li, Wanju; Yu, Yan

doi:10.1016/j.indcrop.2015.03.086

Cited by 89 publications

(34 citation statements)

References 28 publications

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“…7,8 To expand the base of raw materials and produce NFC from nonwoody biomass, bamboo -an abundant natural resource in tropical and sub-tropical areas -could be a promising alternative. 9 Recently, bamboo has been studied for pulping, ethanol, NFC and other biorefinery applications, [9][10][11] yet limited work has been performed on improving the NFC production process from bamboo pulp.…”

Section: Introductionmentioning

confidence: 99%

Improving the production of nanofibrillated cellulose from bamboo pulp by the combined cellulase and refining treatment

Yuan

Wei

Wen

2019

J of Chemical Tech & Biotech

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BACKGROUND: Nanofibrillated cellulose (NFC) has shown great potential for wide applications in various fields and industries such as food, coatings, daily chemicals, superabsorbent high-strength materials, and other high-value products. Bamboo, with a chemical composition and fibre properties comparable to wood, is considered as an ideal nonwood material for the production of high-quality NFC. However, the normally used two-step process [TEMPO-mediated oxidation and high-pressure homogenization (HPH)] not only requires high amounts of energy, but also results in high heterogeneity of the resultant nanocellulose products. RESULTS:In this study, we proposed a sequential treatment method combining cellulase treatment followed by mechanical refining to improve the process for NFC production from bleached bamboo kraft pulp. The results showed that cellulase treatment using an enzyme dosage of 7 U g −1 cellulose followed by mechanical refining for 5000 revolutions increased the content of carboxyl group in treated pulp from 0.46 to 0.90 mmol g −1 cellulose following TEMPO-mediated oxidation. The effect of cellulase treatment and mechanical refining on the fibre properties was investigated in terms of freeness, fibre length, water retention value, pore volume and other fibrillation characteristics, such as the diameter of the NFC fibrils. Finally, we also found that, using the above-proposed process, ca. 85 g high-quality NFC could be produced from 100 g bleached bamboo pulp.CONCLUSIONS: This study demonstrated that the combination of cellulase treatment and mechanical refining is a promising strategy to produce high-quality NFC with short fibril diameter while increasing NFC yield and reducing energy consumption during HPH.

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Section: Introductionmentioning

confidence: 99%

Improving the production of nanofibrillated cellulose from bamboo pulp by the combined cellulase and refining treatment

Yuan

Wei

Wen

2019

J of Chemical Tech & Biotech

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“…Plant fibers consist of highly crystalline cellulose nanofibrils with a width of a few nanometers (nm) and length of several micrometers (µm). These are packed in the form of microfibrils embedded in hemicelluloses and the lignin matrix of the cell wall (Wang et al 2015). Cellulose materials have been gradually gaining global interest due to their potential properties .…”

Section: Introductionmentioning

confidence: 99%

Characterization of Bamboo Nanocellulose Prepared by TEMPO-mediated Oxidation

et al. 2018

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The synthesis of TEMPO-oxidized bamboo cellulose nanofibrils (TOBCNs) was attempted using two locally available species in Thailand (Dendrocalamus asper and D. membranaceus). Bamboo powder was first delignified with NaClO2. The obtained bamboo holocelluloses (BHs) were then oxidized via a TEMPO/NaBr/NaClO system in water at pH 10 for 2 h. The effects of NaClO addition level on the weight recovery ratio, carboxylate content, and nanofibrillation yield were studied. At a higher level of NaClO addition, the weight recovery ratio of TEMPO-oxidized bamboo holocelluloses (TOBHs) decreased from 90% to 70%, while the carboxylate content of TOBHs increased up to 0.8 mmol/g to 0.9 mmol/g for both species. Fourier transform infrared spectra indicated that C6-hydroxyl groups of cellulose were converted to negatively-charged carboxylate groups. After a gentle mechanical treatment with water, transparent liquid of TOBCNs were obtained after the removal of unwanted fraction, which gave a nanofibrillation yield of more than 90% at a NaClO addition level of 7.5 mmol/g to 15.0 mmol/g-BHs. Well individualized TOBCNs were successfully prepared and had a length of several microns and an average width of 5 nm to 7 nm under transmission electron microscopy. Thus, ultra-long TOBCNs are applicable for use as nano-reinforced polymer composites in non-food industries.

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“…We focused on bamboo (Phylostachys heterocycla) as a source of cellulose. 6,7 Although bamboo is a very common plant in Asian countries and it causes serious damage to rural natural areas due to its rapid growth with low nutrients, it has been mostly used as construction material, for handicrafts products, or as food (bamboo shoots) and not been employed as a source of cellulose.…”

Section: Introductionmentioning

confidence: 99%

Direct Extraction of Polysaccharides from Moso Bamboo (Phylostachys heterocycla) Chips Using a Mixed Solvent System of an Amino Acid Ionic Liquid with Polar Aprotic Solvent

Dong¹,

Takeshita²,

Miyafuji³

et al. 2017

Bulletin of the Chemical Society of Japan

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The cellulose-dissolving ability and some physical properties of mixed solvents of an amino acid IL, N-methyl-N-(2-methoxyethyl)pyrolidin-1-ium 2,6-diaminohexanoate ([P 1ME ][Lys]), with polar aprotic solvents, such as 1,3-dimethylimidazolidinone (DMI), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), and acetonitrile (CH 3 CN), have been investigated. The viscosity was significantly reduced by the increasing content of polar aprotic solvents, and a 1:1 mixture (molar ratio) of [P 1ME ][Lys] with DMF showed 91.5 cP which corresponded to less than 1/10 compared to that of the pure IL at 25°C (1058 cP). The β values of the mixed solvents, which have the IL contents over 0.1, exhibited β-values similar to that of the pure IL. On the other hand, the π-value was dependent on the ratio of the IL content, and the pure IL had the highest π-value.We found that the mixed solvent of [P 1ME ][Lys] with DMF (1:1) easily dissolved the cellulose and the mixed solvent could be used to extract cellulose from moso bamboo (Phylostachys heterocycla) powder. The efficiency of the extraction of cellulose from the bamboo powder was significantly increased when a 1:1 mixture of the IL with a polar aprotic solvent was used as the extracting solvent at 60°C; the extraction ratio of the 1:1 mixture (IL: DMF) reached twice that of the pure IL. We thus obtained cellulose in 18% (w/w) yield from the bamboo powder.

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A comparison study on the preparation of nanocellulose fibrils from fibers and parenchymal cells in bamboo (Phyllostachys pubescens)

Cited by 89 publications

References 28 publications

Improving the production of nanofibrillated cellulose from bamboo pulp by the combined cellulase and refining treatment

Improving the production of nanofibrillated cellulose from bamboo pulp by the combined cellulase and refining treatment

Characterization of Bamboo Nanocellulose Prepared by TEMPO-mediated Oxidation

Direct Extraction of Polysaccharides from Moso Bamboo (Phylostachys heterocycla) Chips Using a Mixed Solvent System of an Amino Acid Ionic Liquid with Polar Aprotic Solvent

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