One-shot TEMPO-periodate oxidation of native cellulose

Mendoza, David Joram; Browne, Christine; Raghuwanshi, Vikram Singh; Simon, George P.; Garnier, Gil

doi:10.1016/j.carbpol.2019.115292

Cited by 74 publications

(40 citation statements)

References 44 publications

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“…After the deconvolution, the crystallinity degree was calculated with Eq. 2, proposed by Hermans and Weidinger (1948) and later used by many other researchers (Popescu et al 2007;Mendoza et al 2019)…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

A process for deriving high quality cellulose nanofibrils from water hyacinth invasive species

et al. 2020

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In this study, surface chemistry, the morphological properties, water retention values, linear viscoelastic properties, crystallinity index, tensile strength and thermal properties of water hyacinth (WH) cellulose were correlated with the degree of mechanical processing under high-pressure homogenisation. An initial low-pressure mechanical shear of WH stems resulted in the ease of chemical extraction of good quality cellulose using mild concentrations of chemical reagents and ambient temperature. Further passes through the homogeniser resulted in an overall improvement in cellulose fibrillation into nanofibrils, and an increase in water retention property and linear viscoelastic properties as the number of passes increased. These improvements are most significant after the first and second pass, resulting in up to 7.5% increase in crystallinity index and 50% increase in the tensile strength of films, when compared with the unprocessed WH cellulose. The thermal stability of the WH cellulose was not adversely affected but remained stable with increasing number of passes. Results suggest a high suitability for this process to generate superior quality cellulose nanofibrils at relatively low energy requirements, ideal for sustainable packaging applications and as a structural component to bioplastic composite formulations.

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

A process for deriving high quality cellulose nanofibrils from water hyacinth invasive species

et al. 2020

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“…An intrinsic viscosity measurement was conducted in the TOCNF suspension by dissolving it in cupriethylenediamine according to the ISO standard 5351:2010. The degree of polymerization (DP) was estimated using the Mark–Houwink equation with parameters K = 0.42 and a = 1 ( Mendoza et al, 2019 ).…”

Section: Methodsmentioning

confidence: 99%

A Novel Biosorbent From Hardwood Cellulose Nanofibrils Grafted With Poly(m-Aminobenzene Sulfonate) for Adsorption of Cr(VI)

Bae

et al. 2021

Front. Bioeng. Biotechnol.

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“…These types of profiles proved to be a good approach, the reduced chi-squared being less than 0.1. The degree of crystallinity was calculated according to Equation (1), which was proposed by Hermans and Weidinger (1948) and used after that by other researchers [ 15 , 16 , 17 ]. The crystallite size was calculated according to Scherrer Equation (2) [ 15 , 18 ], while the interplanar spacing was calculated by the Bragg Equation (3) [ 19 ] CrI% = (A cr /A t ) × 100, τ 200 = (k × λ)/(β × cosθ), n × λ = 2d × sinθ, where A cr is the crystalline area, A t is the total area (crystalline and amorphous), τ is the crystallite size, k is the “shape factor” with a value of 0.94, λ is the wavelength (0.1542 nm), β is the peak width at half height (expressed in radians), θ is the position of the peak (half of the 2θ value), n is the order of reflection, and d is the interplanar spacing of the crystal [ 15 , 18 , 19 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Cellulose Nanocrystals Nanofiller on the Structure and Sorption Properties of Carboxymethyl Cellulose–Glycerol–Cellulose Nanocrystals Nanocomposite Systems

2020

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Biobased materials present a great interest due to their properties and biodegradability. Cellulose nanocrystals (CNC) nanofiller, in various amounts, was incorporated into a carboxymethyl cellulose (CMC)–glycerol (G) matrix in order to obtain nanocomposite systems with improved properties. The effect of the nanofiller on the structural features was investigated by Fourier transform infrared (FT-IR) spectroscopy, principal component analysis (PCA), two-dimensional correlation spectroscopy (2D-COS), and X-ray diffraction, while the sorption properties were evaluated by water vapor isotherms using the gravimetric method coupled with infrared spectroscopy. We observed the presence of the interactions taking place between the CMC-G and CNC involving the hydroxyl and carboxylate groups, which decreased the number of water sorption sites. Following this, the moisture content in the nanocomposite films decreased with the increase in the amount of CNC. Moreover, the bands associated to water molecules presented different wavenumber values separated for CMC-G and CNC components.

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One-shot TEMPO-periodate oxidation of native cellulose

Cited by 74 publications

References 44 publications

A process for deriving high quality cellulose nanofibrils from water hyacinth invasive species

A process for deriving high quality cellulose nanofibrils from water hyacinth invasive species

A Novel Biosorbent From Hardwood Cellulose Nanofibrils Grafted With Poly(m-Aminobenzene Sulfonate) for Adsorption of Cr(VI)

Effect of Cellulose Nanocrystals Nanofiller on the Structure and Sorption Properties of Carboxymethyl Cellulose–Glycerol–Cellulose Nanocrystals Nanocomposite Systems

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