Stable nanocellulose gels prepared by crosslinking of surface charged cellulose nanofibrils with di- and triiodoalkanes

Levanič, Jaka; Gericke, Martin; Heinze, Thomas; Poljanšek, Ida; Oven, Primož

doi:10.1007/s10570-019-02947-3

Cited by 12 publications

(7 citation statements)

References 41 publications

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“…Namely, light transmittance is related to particle size or, in this case, nanofibril width . Larger particles, unfibrillated fiber fragments or agglomerates, scatter incident light more effectively, thus reducing the transmittance value. , In the case of highly fibrillated TEMPO-oxidized celluloses, the fibril diameters are in the low nanometer ranges (3–10 nm). , Such small particles do not effectively scatter incident light; hence, most will pass through the dispersion, contributing to the high light transmittance values …”

Section: Resultsmentioning

confidence: 99%

“…The different pulp batches were treated for 30, 40, 50, 60, and 120 min. Fibrillation was performed on a PandaPLUS 2000 high-pressure homogenizer (GEA NS, Parma, Italy). ,, Three passes of the fiber suspension, with a solid content of 0.5 wt % through the homogenizer at 500 bar, were sufficient to produce highly translucent and viscous TEMPO-oxidized cellulose nanofibril dispersion (TCNF). Samples were taken prior to homogenization and after every pass.…”

Section: Methodsmentioning

confidence: 99%

“…46,47 In the case of highly fibrillated TEMPO-oxidized celluloses, the fibril diameters are in the low nanometer ranges (3−10 nm). 8,36 Such small particles do not effectively scatter incident light; hence, most will pass through the dispersion, contributing to the high light transmittance values. 32 Increasing the TEMPO oxidation time and subsequent homogenization steps had a profound effect on the light transmittance values of TEMPO-TCNFs (Table 5).…”

Section: T H I S C O N T E N T Imentioning

confidence: 99%

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Analyzing TEMPO-Oxidized Cellulose Fiber Morphology: New Insights into Optimization of the Oxidation Process and Nanocellulose Dispersion Quality

Levanič

Šenk

Nadrah

et al. 2020

ACS Sustainable Chem. Eng.

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High-definition automated optical analysis was used to observe the morphological changes of bleached hardwood dissolving pulp during oxidation mediated by (2,2,6,6-tetramethylpiperidn-1-yl)oxyl (TEMPO). The effects of TEMPO treatment kinetics on fiber morphology and fibrillation degree at a constant reagent loading were studied. The pulp underwent significant swelling, and carboxyl groups were introduced in which the fiber cell walls loosened, which contributed to fibrillation and subsequently nanocellulose dispersion quality in terms of both viscosity and visible light transmittance. The use of an automated optical fiber analyzer facilitates process control, as it allows controlling the fiber morphology and preventing major losses in the form of pulp fines stemming from an unnecessarily long TEMPO oxidation time.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: T H I S C O N T E N T Imentioning

confidence: 99%

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Analyzing TEMPO-Oxidized Cellulose Fiber Morphology: New Insights into Optimization of the Oxidation Process and Nanocellulose Dispersion Quality

Levanič

Šenk

Nadrah

et al. 2020

ACS Sustainable Chem. Eng.

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“…1a features an intensive band around 1610 cm, 1 which is attributed to the carboxylate group that has been introduced through TEMPO oxidation. 31 The peaks at approximately 2905 cm −1 and 3300 cm −1 are assigned to the sp 3 -hybridised CH stretching and OH stretching, respectively. 32 The observed peaks between 1000–1060 cm −1 correspond to C–O–C stretching vibrations, while the peak at 1201 cm −1 is associated with –OH in-plane bending.…”

Section: Resultsmentioning

confidence: 99%

Eco-efficient pickering foams: leveraging sugarcane waste-derived cellulose nanofibres

Amani,

Amiralian,

Athukoralalage

et al. 2023

J. Mater. Chem. A

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“…The covalent crosslinking of nanocelluloses has been investigated for a broad range of applications, including tissue engineering, 181 drug delivery, 182,183 water treatment, 184 and three‐dimensional (3D) printing 185 . CNC are crosslinked using a mixture of PEG and poly(methyl vinyl ether‐ co ‐maleic acid, PMVEMA) as crosslinking agents in acidic conditions to develop cellulose nanocomposite films 186 .…”

Section: Chemical Structure‐property Relationships In Nanocellulosesmentioning

confidence: 99%

Chemical structure–property relationships in nanocelluloses

Pitcher,

Koshani,

Sheikhi

2023

Journal of Polymer Science

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Nanocelluloses, nanoscale cellulosic particles or fibrils, are an appealing class of nanomaterials with enormous potential for sustainable development. They have great promise to target some of the 17 Sustainable Development Goals outlined by the United Nations. Nanocelluloses are derived from the most abundant biopolymer in the world, cellulose, which have multiple hydroxyl groups on their surface, enabling a vast range of chemical modifications. The interplay between the chemical structure and physicochemical properties of nanocelluloses is crucial to engineering the next generation of green, functional nanomaterials. In this review paper, we provide a comprehensive account of the structure–property relationships in nanocelluloses, which may establish the basis for the design of precision bio‐based materials. Chemical modifications of nanocelluloses, including hydrolysis, oxidation, esterification, amidation, and polymer grafting, provide an array of chemical and physical properties that open opportunities in a diverse spectrum of applications. We review how chemical modifications affect the physicochemical properties of nanocelluloses, such as thermal stability, hydrophobicity, and dispersibility in nonpolar media. Understanding nanocellulose chemical structure–property relationships is integral to the development of sustainable material platforms based on the most renewable biopolymer on earth.

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Stable nanocellulose gels prepared by crosslinking of surface charged cellulose nanofibrils with di- and triiodoalkanes

Cited by 12 publications

References 41 publications

Analyzing TEMPO-Oxidized Cellulose Fiber Morphology: New Insights into Optimization of the Oxidation Process and Nanocellulose Dispersion Quality

Analyzing TEMPO-Oxidized Cellulose Fiber Morphology: New Insights into Optimization of the Oxidation Process and Nanocellulose Dispersion Quality

Eco-efficient pickering foams: leveraging sugarcane waste-derived cellulose nanofibres

Chemical structure–property relationships in nanocelluloses

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