Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Park, Chanwoo; Han, Sang‐Ik; Namgung, Hyun-Woo; Seo, Pureun-Narae; Lee, Sun-Young; Lee, Seung Hwan

doi:10.15376/biores.12.3.5031-5044

Cited by 41 publications

(46 citation statements)

References 20 publications

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“…CNF can be obtained by mechanical treatment of wood with strong shear forces such as a grinder, fluidizer, and homogenizer. On the basis of chemical composition, CNF can be categorized as lignocellulose nanofibrils (LCNF) that contain both lignin and hemicellulose, holocellulose nanofibrils (HCNF) that contain only hemicellulose and no lignin, and pure cellulose nanofibrils (PCNF) that comprise only the cellulose component (Park et al 2017b).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of AgNPs using lignocellulose nanofibrils as a reducing and supporting agent

Han

Alle

Bandi

et al. 2020

BioRes

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A novel green approach was developed for producing silver nanoparticles (AgNPs) using lignocellulose nanofibrils (LCNF). This method does not require any additional reducing agent, and the LCNF itself serves both as a reducing agent and a supporting material. A simple autoclave procedure was employed for the synthesis. The synthetic conditions such as concentrations of reactants and reaction time were optimized. Also, the effect of lignin content in LCNF on the formation of AgNPs was evaluated. Three types of cellulose nanofibrils, i.e., HCNF (0% lignin), LCNF-5 (5% lignin), and LCNF-18 (18% lignin), were employed for the preparation of AgNPs. Three types of AgNPs were obtained and thoroughly characterized using UV-vis, Fourier-transform Infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results suggest that LCNF can be employed as a green source for the reduction and effective stabilization of AgNPs, but an increased content of lignin can have an adverse effect on the yield of AgNPs. However, the presence of lignin greatly influenced the particle size. Therefore, LCNF with small amounts of lignin (5%) is best for producing AgNPs.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of AgNPs using lignocellulose nanofibrils as a reducing and supporting agent

Han

Alle

Bandi

et al. 2020

BioRes

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“…Furthermore, the use of an aqueous medium during the mechanical isolation of NCs has also been gradually implemented to improve the delamination process. A recent study by Park et al [87], revealed enhanced defibrillation efficiency of wood-based microfibrils using a wet diskmilling process for the production of CNFs. Higher tensile strength of the subsequently prepared CNFs-based nanopapers was observed.…”

Section: Mechanical Isolation Of Ncsmentioning

confidence: 99%

Recent Advances in the Synthesis of Nanocellulose Functionalized–Hybrid Membranes and Application in Water Quality Improvement

Mbakop

Nthunya

2021

Processes

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The increasing discharge of voluminous non or partially treated wastewaters characterized by complex contaminants poses significant ecological and health risks. Particularly, this practice impacts negatively on socio-economic, technological, industrial, and agricultural development. Therefore, effective control of water pollution is imperative. Over the past decade, membrane filtration has been established as an effective and commercially attractive technology for the separation and purification of water. The performance of membrane-based technologies relies on the intrinsic properties of the membrane barrier itself. As a result, the development of innovative techniques for the preparation of highly efficient membranes has received remarkable attention. Moreover, growing concerns related to cost-effective and greener technologies have induced the need for eco-friendly, renewable, biodegradable, and sustainable source materials for membrane fabrication. Recently, advances in nanotechnology have led to the development of new high-tech nanomaterials from natural polymers (e.g., cellulose) for the preparation of environmentally benign nanocomposite membranes. The synthesis of nanocomposite membranes using nanocelluloses (NCs) has become a prominent research field. This is attributed to the exceptional characteristics of these nanomaterials (NMs) namely; excellent and tuneable surface chemistry, high mechanical strength, low-cost, biodegradability, biocompatibility, and renewability. For this purpose, the current paper opens with a comprehensive yet concise description of the various types of NCs and their most broadly utilized production techniques. This is closely followed by a critical review of how NC substrates and their surface-modified versions affect the performance of the fabricated NC-based membranes in various filtration processes. Finally, the most recent processing technologies for the preparation of functionalized NCs-based composite membranes are discussed in detail and their hybrid characteristics relevant to membrane filtration processes are highlighted.

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“…Thus, the fabrication of a high-strength long filament from natural cellulose fiber, especially from cellulose nanofibril (CNF) [4,8,[17][18][19][20], is challenging. CNF can be generally isolated from plant cell walls by a mechanical defibrillation process, such as wet disk-milling (WDM), high-pressure homogenizing (HPH), and ball-milling [3,6,[21][22][23]. The CNF has been observed to be approximately 10-30 nm in diameter, with excellent properties such as large specific surface area, good thermal properties, and high strength [6,9,21,22].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristics of Wet-Spun Filament Made of Cellulose Nanofibrils with Different Chemical Compositions

Park

Han

et al. 2020

Polymers

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In this study, wet-spun filaments were prepared using lignocellulose nanofibril (LCNF), with 6.0% and 13.0% of hemicellulose and lignin, respectively, holocellulose nanofibril (HCNF), with 37% hemicellulose, and nearly purified-cellulose nanofibril (NP-CNF) through wet-disk milling followed by high-pressure homogenization. The diameter was observed to increase in the order of NP-CNF ≤ HCNF < LCNF. The removal of lignin improved the defibrillation efficiency, thus increasing the specific surface area and filtration time. All samples showed the typical X-ray diffraction pattern of cellulose I. The orientation of CNFs in the wet-spun filaments was observed to increase at a low concentration of CNF suspensions and high spinning rate. The increase in the CNF orientation improved the tensile strength and elastic modulus of the wet-spun filaments. The tensile strength of the wet-spun filaments decreased in the order of HCNF > NP-CNF > LCNF.

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Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Cited by 41 publications

References 20 publications

Green synthesis of AgNPs using lignocellulose nanofibrils as a reducing and supporting agent

Green synthesis of AgNPs using lignocellulose nanofibrils as a reducing and supporting agent

Recent Advances in the Synthesis of Nanocellulose Functionalized–Hybrid Membranes and Application in Water Quality Improvement

Preparation and Characteristics of Wet-Spun Filament Made of Cellulose Nanofibrils with Different Chemical Compositions

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