Multifunctional nanocellulose-based composites for potential environmental applications

Lan, Guoxin; Liu, Yue; Zhou, Nong; Guo, Dongqin; Ma, Ming‐Guo

doi:10.1007/s10570-022-04918-7

Cited by 15 publications

(8 citation statements)

References 124 publications

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“…Increasing the concentration to 0.70% (w/w) gave a pore volume of 49.8 mm 3 ·g –1 and a surface area of 12.44 m 2 g –1 . These results for CNFs are significantly improved compared to cellulosic fibers and comparable to other nanocellulose aerogels . Further, these results indicate that the pore volume and surface area may be attenuated by increasing the concentration of CNFs leading to a decrease in specific surface area and total pore volume.…”

Section: Resultsmentioning

confidence: 57%

“…The model has been used for predicting adsorption/desorption isotherms in nanopores of different geometries over a wide range of pore sizes (0.5–100 nm) and for calculating pore size distributions from adsorption isotherms . The method can be ideal for describing the actual pore size distribution in porous sorbents, particularly in the micropore and narrow mesopore regions, , and has been widely applied to study cellulosic materials and composites. − …”

Section: Resultsmentioning

confidence: 99%

“… 37 The method can be ideal for describing the actual pore size distribution in porous sorbents, particularly in the micropore and narrow mesopore regions, 38 , 39 and has been widely applied to study cellulosic materials and composites. 40 − 42 …”

Section: Resultsmentioning

confidence: 99%

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Assessment of Cellulose Nanofiber-Based Elastase Biosensors to Inflammatory Disease as a Function of Spacer Length and Fluorescence Response

Easson,

Jordan,

Edwards

et al. 2024

ACS Appl. Bio Mater.

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Inflammatory disease biomarker detection has become a high priority in point-of-care diagnostic research in relation to chronic wounds, with a variety of sensor-based designs becoming available. Herein, two primary aspects of biosensor design are examined: (1) assessment of a cellulose nanofiber (CNF) matrix derived from cotton ginning byproducts as a sensor transducer surface; and (2) assessment of the relation of spacer length and morphology between the CNF cellulose backbone and peptide fluorophore as a function of sensor activity for porcine pancreatic and human neutrophil elastases. X-ray crystallography, specific surface area, and pore size analyses confirmed the suitability of CNF as a matrix for wound care diagnostics. Based upon the normalized degree of substitution, a pegylated-linker connecting CNF transducer substrate to peptide fluorophore showed the greatest fluorescence response, compared to short-and long-chain alkylated linkers.

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Section: Resultsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 99%

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Assessment of Cellulose Nanofiber-Based Elastase Biosensors to Inflammatory Disease as a Function of Spacer Length and Fluorescence Response

Easson,

Jordan,

Edwards

et al. 2024

ACS Appl. Bio Mater.

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“…The functional groups on the surface of CNWs offer new possibilities for adsorption sites, enhancing the adsorption performance of composites containing these nanofillers compared to traditional hydrogels. As a result, the development and application of composite hydrogels containing CNWs in the adsorption of various contaminants (e.g., dyes, metals, pharmaceuticals) from water have experienced significant growth (Lan et al 2023;Li et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Systematic evaluation of cellulose nanowhiskers effect on the Pb(II) adsorption by superabsorbent hydrogels nanocomposites: An experimental and theoretical study

Fajardo,

Oliboni,

Magalhães

et al. 2023

Preprint

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The incorporation of cellulose nanowhiskers (CNWs) in superabsorbent hydrogels of starch grafted with poly(acrylic acid) (ST-g-PAAc) is proposed as a strategy to obtain adsorbent materials with superior performance for Pb(II) removal. The functionalized surface of CNWs provides additional interaction sites, contributing to the high adsorption capacity (935.8 mg/g) of the composite hydrogel. The presence of CNWs also minimizes the effects of temperature and competition with other ions, making the adsorption process more stable and efficient. Density functional theory (DFT) calculations revealed that the hydroxyl groups of CNWs play a crucial role in providing additional binding energies (approximately 30 kcal/mol) for the Pb(II) ions, favoring the spontaneity and kinetics of the adsorption process. The adsorption process on the CNWs-containing hydrogel involves chemisorption and intra-particle diffusion, indicating multiple steps occurring during the adsorption of Pb(II) ions. Also, the CNWs-containing hydrogel demonstrates excellent reusability, showing minimal loss of adsorption capacity after consecutive reuses. This characteristic makes the composite highly attractive for practical applications in real-world scenarios. In short, the systematic evaluation of different experimental conditions has confirmed the superior adsorption performance of the composite hydrogel and gives light on the role of CNWs as a valuable nanofiller to enhance the adsorption properties of these materials.

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“…Hydrogels are solid-liquid systems with three-dimensional cross-linked networks, formed by a variety of watersoluble polymers. It is possible to formulate gels with of microbeads (Coombs OBrien et al 2017), for preparing air-filtering systems (Lippi et al 2022;Stanislas et al 2022), and as a component in composite materials (Miao and Hamad 2013;Riva et al 2021;Lan et al 2022;Tanpichai et al 2022).…”

mentioning

confidence: 99%

TEMPO-oxidized cellulose nanofibril/polyvalent cations hydrogels: a multifaceted view of network interactions and inner structure

et al. 2023

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In the last years, hydrogels from renewable biopolymers and low-cost row materials are a hot topic for biomedical applications. In this context, cellulose nanofibrils are considered suitable building blocks for the synthesis of many biocompatible products, with a variety of chemical-physical properties. Herein we report a multi-technique and multi-scale study, from the molecular to the nanometric length scale, of the sol–gel transition observed in aqueous solutions of TEMPO-oxidized nano-sized cellulose fibrils (TOCNFs), when in the presence of polyvalent cations (Mg2+ and Ca2+). We combine the data from Small Angle Neutron Scattering (SANS), which provide information about the inner structure of the nanofibril, with those from UV Resonant Raman (UVRR) spectroscopy, which is a sensitive probe of the intra- and inter-molecular interactions in the gel and the liquid state. The transition between the gel and the liquid phases is investigated as a function of the concentration of both TOCNFs and cations, the nature of the latter, and the pH at which the phenomenon is observed. SANS analysis reveals that ion concentration induces an anisotropic swelling in the nanofibrils which, at the same time, become more and more flexible. The nanofibrils flexibility is also dependent on TOCNF concentration and pH value. UVRR allows us to elucidate the structural organization and hydrogen-bonding properties of water in aqueous TOCNF dispersions and gels, showing how water molecules partially lose their typical bulk-like tetrahedral organization when ions are added, and the gel phase is formed. Graphical abstract

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Multifunctional nanocellulose-based composites for potential environmental applications

Cited by 15 publications

References 124 publications

Assessment of Cellulose Nanofiber-Based Elastase Biosensors to Inflammatory Disease as a Function of Spacer Length and Fluorescence Response

Assessment of Cellulose Nanofiber-Based Elastase Biosensors to Inflammatory Disease as a Function of Spacer Length and Fluorescence Response

Systematic evaluation of cellulose nanowhiskers effect on the Pb(II) adsorption by superabsorbent hydrogels nanocomposites: An experimental and theoretical study

TEMPO-oxidized cellulose nanofibril/polyvalent cations hydrogels: a multifaceted view of network interactions and inner structure

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