Characterization of carboxymethyl cellulose-based nanocomposite films reinforced with oxidized nanocellulose isolated using ammonium persulfate method

Oun, Ahmed A.; Rhim, Jong‐Whan

doi:10.1016/j.carbpol.2017.06.121

Cited by 136 publications

(100 citation statements)

References 37 publications

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“…Comparatively, the yield of conventional heating (C 1 ) was very close to the highest for the microwave mode of heating (M 3 ). Note that, in other previous works, APS treatment applied to the cotton raw material has led to CNCs with average yields that were comparable or even lower than that achieved using M 3 method [40][41][42]. Additionally, the results were, in all MW heating programs, more repeatable, with standard deviations significantly lower than the conventional CNCs preparation procedure, thanks to the rigid control of the reaction conditions allowed by the microwave reactor.…”

Section: Evaluation Of the Yield Of Cellulose Nanocrystalsmentioning

confidence: 61%

“…This is a characteristic for crystals with the Miller index (1 0 2) in cellulose type I polymorph, which does not always appear in all type I cellulose samples [34,39]. Five crystalline peaks (1 1 0, 1 1 0, 1 0 2, 2 0 0, and 0 0 4) were separated in many cases [64], but four crystalline peaks (1 1 0, 1 1 0, 2 0 0, and 0 0 4) were assumed in other studies [40,65]. Such features, including the d-spacing and average crystallite size, as determined by the Bragg's and Scherrer's equations, resembled the diffraction pattern of cellulose I β , according to crystallographic data reported in our previous work [3].…”

Section: X-ray Powder Diffraction Analysismentioning

confidence: 87%

“…where w T+∆T and w T−∆T are the residual weights of the sample at temperature T+∆T and T−∆T, respectively, and ∆T is the interval of temperature for reading residual sample weight [40]. The onset and endset degradation temperatures of the samples were obtained from TGA curves, as the intersection of the tangents to the point of deviation from the initial and final weight, respectively, and the inflection point of the curve.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

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Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

et al. 2020

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In contrast to conventional approaches, which are considered to be energy- and time-intensive, expensive, and not green, herein, we report an alternative microwave-assisted ammonium persulfate (APS) method for cellulose nanocrystals (CNCs) production, under pressurized conditions in a closed reaction system. The aim was to optimize the hydrolytic-oxidative patented procedure (US 8,900,706), replacing the conventional heating with a faster process that would allow the industrial scale production of the nanomaterial and make it more appealing to a green economy. A microwave-assisted process was performed according to different time–temperature programs, varying the ramp (from 5 to 40 min) and the hold heating time (from 60 to 90 min), at a fixed reagent concentration and weight ratio of the raw material/APS solution. Differences in composition, structure, and morphology of the nanocrystals, arising from traditional and microwave methods, were studied by several techniques (TEM, Fourier transform infrared spectroscopy (FTIR)-attenuated total reflectance (ATR), dynamic light scattering (DLS), electrophoretic light scattering (ELS), thermogravimetric analysis (TGA), X-ray diffraction (XRD)), and the extraction yields were calculated. Fine tuning the microwave treatment variables, it was possible to realize a simple, cost-effective way for faster materials’ preparation, which allowed achieving high-quality CNCs, with a defined hydrodynamic diameter (150 nm) and zeta potential (−0.040 V), comparable to those obtained using conventional heating, in only 90 min instead of 16 h.

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Section: Evaluation Of the Yield Of Cellulose Nanocrystalsmentioning

confidence: 61%

Section: X-ray Powder Diffraction Analysismentioning

confidence: 87%

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

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Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

et al. 2020

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“…According to the TG curves [Figure (a)], the thermograms of each film sample showed two main steps of weight loss. The first weight loss in the range of 70–130 °C was mainly associated to evaporation of water that existed in the form of free or bound water . The main weight loss was observed at 180–340 °C which due to the fast thermal degradation of polymers .…”

Section: Resultsmentioning

confidence: 85%

“…The first weight loss in the range of 70-130 C was mainly associated to evaporation of water that existed in the form of free or bound water. 47 The main weight loss was observed at 180-340 C which due to the fast thermal degradation of polymers. 48 The temperature of 50% weight loss for pure CMC film, CMC/MMT film, and CMC/MMT/ε-PL films with different contents of ε-PL were 296.8, 306.9, 303.6, 300.7, 297.8, 296.8, and 296.1 C, respectively.…”

Section: Film Thermal Propertymentioning

confidence: 99%

Carboxymethyl cellulose‐based nanocomposites reinforced with montmorillonite and ε‐poly‐l‐lysine for antimicrobial active food packaging

Xiang

2019

J of Applied Polymer Sci

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Traditional packaging materials with single function or weak activity cannot meet the requirements of active packaging. In this study, antimicrobial carboxymethyl cellulose (CMC)‐based nanocomposites containing montmorillonite (MMT) and ε‐poly‐(l‐lysine) (ε‐PL) were prepared by solution casting method. The morphological, optical, mechanical, barrier, thermal, and antimicrobial properties of the resulted ternary nanocomposites were investigated. The surface morphology of the films was dependent on the contents of the ε‐PL used. The incorporation of MMT and ε‐PL into CMC matrix improved the UV barrier property, tensile strength, hydrophobicity, and water vapor barrier property. When incorporation of 7.5 wt % ε‐PL, the tensile strength increased more than threefold and the water vapor permeability decreased by about 35% compared with pure CMC film, the water contact angle reached up to the highest value of 65.38°. The ε‐PL incorporated CMC/MMT films exhibited good antimicrobial activities against Gram‐positive (Staphylococus aureus) and Gram‐negative (Escherichia coli) bacteria and fungi (Botrytis cinerea and Rhizopus oligosporus). Microbial growth inhibition rate of above 90% was obtained when the content of ε‐PL got up to 7.5 wt %. In addition, CMC/MMT/ε‐PL7.5 wt % film‐forming solution having the appropriate properties was used as coating for the strawberries preservation, the shelf life of strawberries was extended for 2 days. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48782.

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Biodegradable Composite for Smart Packaging Applications

Bharadwaj

Dhand

Lakshmi

2022

Biodegradable Materials and Their Applications

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Characterization of carboxymethyl cellulose-based nanocomposite films reinforced with oxidized nanocellulose isolated using ammonium persulfate method

Cited by 136 publications

References 37 publications

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment

Carboxymethyl cellulose‐based nanocomposites reinforced with montmorillonite and ε‐poly‐l‐lysine for antimicrobial active food packaging

Biodegradable Composite for Smart Packaging Applications

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