Facile one-step extraction and oxidative carboxylation of cellulose nanocrystals through hydrothermal reaction by using mixed inorganic acids

Cheng, Miao; Qin, Zongyi; Chen, Yuanyu; Liu, Jiaming; Ren, Zichu

doi:10.1007/s10570-017-1339-1

Cited by 66 publications

(66 citation statements)

References 35 publications

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“…One strategy is conducted by conductivity titration, while the other is based on the peak height ratio of a particular group in the infrared spectrum. The result of the conductivity titration was in agreement with that obtained by the FTIR spectrum [ 21 ]. In the latter method, the DO value could be obtained by calculating the ratio between carbonyl peak intensity and the most powerful bond near 1070 cm −1 related to the skeleton of cellulose.…”

Section: Resultssupporting

confidence: 85%

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Enhanced Antibacterial Performance and Cytocompatibility of Silver Nanoparticles Stabilized by Cellulose Nanocrystal Grafted with Chito-Oligosaccharides

Wang

Yue

et al. 2018

Materials

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The agglomeration of silver nanoparticles (AgNPs) results in poor antibacterial performance, and the accumulation of silver in the human body threatens human health. Preparing a matrix is a technique worth considering as it not only prevents the aggregation of AgNPs but also reduces deposition of AgNPs in the human body. In this paper, carboxy-cellulose nanocrystals (CCNC) were prepared by a simple one-step acid hydrolysis method. Chito-oligosaccharides (CSos) were grafted onto the surface of CCNC to form CSos-CCNC composite nanoparticles. CCNC and CSos-CCNC were used as stabilizers for deposing AgNPs and two types of complexes—AgNPs-CCNC and AgNPs-CSos-CCNC—were obtained, respectively. The influence of the two stabilizer matrices—CCNC and CSos-CCNC—on the morphology, thermal behavior, crystal structure, antibacterial activity, and cell compatibility of AgNPs-CCNC and AgNPs-CSos-CCNC were examined. The results showed that the AgNPs deposited on the CSos-CCNC surface had a smaller average diameter and a narrower particle size distribution compared with the ones deposited on CCNC. The thermal stability of AgNPs-CSos-CCNC was better than that of AgNPs-CCNC. AgNPs did not affect the crystalline structure of CCNC and CSos-CCNC. The antibacterial activity of AgNPs-CSos-CCNC was better than that of AgNPs-CCNC based on antibacterial studies using Escherichia coli, Staphylococcus aureus, and Klebsiella pneumoniae. The cytotoxicity of AgNPs-CSos-CCNC was remarkably lower than that of AgNPs-CCNC.

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Section: Resultssupporting

confidence: 85%

“…Here, the DO value of CCNC obtained from infrared spectra is 0.076. Theoretically, the maximum DO value of CCNC is 0.2 [ 21 ]. It is deemed that around 38% of primary hydroxyl was oxidized to -COOH.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Antibacterial Performance and Cytocompatibility of Silver Nanoparticles Stabilized by Cellulose Nanocrystal Grafted with Chito-Oligosaccharides

Wang

Yue

et al. 2018

Materials

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“…The resultant spherical CNCs suspension with the dimension of 10-180 nm showed liquid crystalline property when the concentration was above 3.9%. A mixed acid system of hydrochloric acid and nitric acid (HCl/HNO 3 ) could be used to prepare carboxylated cellulose nanocrystals (CCNCs) from MCC [75]. When the reaction was carried out under the mixed acid (HCl/HNO 3 = 7 : 3 (v/v)) concentration being 4 M at 110 ∘ C for 3 h, the resultant CCNCs were rod-like morphology (176 ± 6 nm length and 11 ± 2 nm width) and had excellent suspension stability and good thermal stability.…”

Section: Mineral Acid Hydrolysismentioning

confidence: 99%

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

Xie

Yang

2018

International Journal of Polymer Science

207

128

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The recent strategies in preparation of cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs) were described. CNCs and CNFs are two types of nanocelluloses (NCs), and they possess various superior properties, such as large specific surface area, high tensile strength and stiffness, low density, and low thermal expansion coefficient. Due to various applications in biomedical engineering, food, sensor, packaging, and so on, there are many studies conducted on CNCs and CNFs. In this review, various methods of preparation of CNCs and CNFs are summarized, including mechanical, chemical, and biological methods. The methods of pretreatment of cellulose are described in view of the benefits to fibrillation.

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“…Besides, a high yield and dispersion stability along with a narrower size of CNCs could be observed. [ 72 ]…”

Section: Preparation Methods Of Cncsmentioning

confidence: 99%

A comprehensive review on cellulose nanocrystals and cellulose nanofibers: Pretreatment, preparation, and characterization

Nagarajan¹,

Ramanujam²,

Sanjay

et al. 2021

Polymer Composites

195

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Crafting ecological materials from green resources is posing a significant challenge for the researchers and scientists around the globe and has resulted in the development of nanocellulose materials, which has paved the way for enriching the basic knowledge and many opportunities on developing biobased materials. This has augmented the utilization of carbohydrate-based organic materials and successfully replacing conventional nonrenewable materials. Cellulose nanomaterials (CNMs) belonging to the newer emerging field of nanomaterials are finding increasing interest among the investigators owing to their environmentally sustainable characteristics like biodegradability, biocompatibility, and potential availability in abundance at a cheaper price. The present review article intends to provide a detailed insight about the advancements and various challenges postured in the field of cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs). The article further discusses about different cellulose fiber extraction sources and their methods, purification processes employed, various sample preparation and drying techniques used for CNCs and CNFs. The article also outlines the various characterization methods practiced for scrutinizing CNCs and CNFs when used in polymer matrix composites. Finally, the benefits of using the CNMs in several potential applications such as paper, oil and gas industries, food packaging and structural sectors, conductive ink and water purification areas, medical and printed electronic fields are highlighted in this extensively reviewed article.

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Facile one-step extraction and oxidative carboxylation of cellulose nanocrystals through hydrothermal reaction by using mixed inorganic acids

Cited by 66 publications

References 35 publications

Enhanced Antibacterial Performance and Cytocompatibility of Silver Nanoparticles Stabilized by Cellulose Nanocrystal Grafted with Chito-Oligosaccharides

Enhanced Antibacterial Performance and Cytocompatibility of Silver Nanoparticles Stabilized by Cellulose Nanocrystal Grafted with Chito-Oligosaccharides

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

A comprehensive review on cellulose nanocrystals and cellulose nanofibers: Pretreatment, preparation, and characterization

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