Fundamentals of and advances in nanocellulose and nanochitin systems

Jin, Soo-Ah; Spontak, Richard J.

doi:10.1016/j.aiepr.2023.04.003

Cited by 5 publications

(1 citation statement)

References 185 publications

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“…When combined, chitosan’s high cationic charge density favors interaction with the negatively charged fibers of cellulose-based materials, while NFC’s high surface area and large number of hydroxyl groups provide the ideal platform for nano-scale interfibrillar bridging. The synergistic effect between the two additives can be attributed to the intimate interaction between the cationic functional groups of chitosan and the NFC’s hydroxyl groups, as well as their high surface area, which facilitates strong bonds [ 25 , 26 , 27 , 28 ]. Studies on chitosan films with NFC additives have shown that the addition of NFC improved the mechanical and barrier properties of chitosan films, thus providing insight into the potential synergy of chitosan and NFC as additives in improving paper’s properties [ 29 , 30 , 31 , 32 , 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Paper Packaging’s Wet Strength Using the Synergy between Chitosan and Nanofibrillated Cellulose Additives

Andze,

Skute,

Zoldners

et al. 2024

Polymers

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The demand for eco-friendly packaging materials has urged researchers to look for alternatives to petroleum-based polymers. In this regard, paper-based products have turned out to be a promising choice; however, their weak resistance to water has limited their application. The use of various additives to enhance paper’s moisture resistance is a common practice. However, considering the growing global agenda for sustainable development, the search for new bio-based paper additives has become increasingly important. This study investigated the potential synergistic impact of the addition of nanofibrillated cellulose (NFC) and chitosan additives (CHIT) to different fiber combinations to improve paper’s properties, in particular, their wet strength. The efficacy of the additive application order was examined and was found to be crucial in achieving the desired outcomes. The results showed that incorporating CHIT after NFC enhanced the paper’s tensile and burst indicators, as well as the paper stretch in the dry state, by 35–70%, 35–55%, and 20–35%, respectively. In addition, the tensile index and stretch in the wet state improved 9–13 times and 2.5–5.5 times over, respectively. The air permeability decreased 2.5–12 times over. These findings demonstrate that the sequential addition of the NFC and CHIT additives yield a greater enhancement of paper’s properties than using each additive separately.

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Section: Introductionmentioning

confidence: 99%

Enhancing Paper Packaging’s Wet Strength Using the Synergy between Chitosan and Nanofibrillated Cellulose Additives

Andze,

Skute,

Zoldners

et al. 2024

Polymers

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Introducing Hydrogen Bond Networks in the Self‐Assembly of Chitin Nanocrystals: Strong and Flexible Bioactive Films Containing Natural Polyphenols

Massari,

Sgarzi,

Gigli

et al. 2024

Advanced Sustainable Systems

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Free‐standing, highly transparent and flexible films are obtained from solvent casting of aqueous colloidal dispersions of surface‐deacetylated chitin nanocrystals. The Young's modulus and the water absorption of the films is further modulated by the addition of three natural polyphenols, i.e., epigallocatechingallate, tannic acid and one lignosulfonate, which differ one another in terms of molecular weight, and overall amount of hydroxy, phenolic and catecholic functionalities. The polyphenolic molecules create an extensive network of hydrogen bonds with the nanocrystals, thus controlling interfacial interactions. Therefore, they act as crosslinkers exerting a reinforcing and structuring action and hampering water absorption. The films do not show dissolution in water upon 7 days of incubation at room temperature, and the release profiles of the polyphenols in aqueous media evidence hindered Fickian diffusion kinetics confirming the presence of interactions with the nanostructured matrix. Lastly, the developed films possess bioactive properties, as they show both radical scavenging and antimicrobial activity. These characteristics are enhanced by the phenolic and, most importantly, catecholic moieties present in tannins (and to a lesser extent in lignins), allowing to reach bactericidal effects as high as 99.99% against both Gram‐positive and Gram‐negative strains.

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Recent advances in structural color materials based on flexible cellulose nanocrystals

Venkatesan,

Dhilipkumar,

Al-Sehemi

et al. 2024

Cellulose

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Fundamentals of and advances in nanocellulose and nanochitin systems

Cited by 5 publications

References 185 publications

Enhancing Paper Packaging’s Wet Strength Using the Synergy between Chitosan and Nanofibrillated Cellulose Additives

Enhancing Paper Packaging’s Wet Strength Using the Synergy between Chitosan and Nanofibrillated Cellulose Additives

Introducing Hydrogen Bond Networks in the Self‐Assembly of Chitin Nanocrystals: Strong and Flexible Bioactive Films Containing Natural Polyphenols

Recent advances in structural color materials based on flexible cellulose nanocrystals

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