Preparation and Characterization of Regenerated Cellulose Film from a Solution in Lithium Bromide Molten Salt Hydrate

Zhang, Xueqin; Xiao, Naiyu; Wang, Huihui; Liu, Chuanfu; Pan, Xuejun

doi:10.3390/polym10060614

Cited by 63 publications

(27 citation statements)

References 41 publications

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“…used molten salt hydrate of lithium bromide (LiBr) to prepare regenerated cellulose films from kraft pulp. The maximum elongation break and tensile strength reached 26% and 67 MPa for films regenerated from 65 wt % LiBr [14]. Pang et al used ionic liquid 1-ethyl-3-methylimidazolium acetate to dissolve different celluloses (pine, cotton, bamboo, MCC) at 5 wt % for film preparations, and the tensile strengths and elongation breaks were 69–120 MP and 6–8%, respectively [15].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cellulose Films from Sustainable CO2/DBU/DMSO System

Jin

Gan

et al. 2019

Polymers

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Cellulose films are regarded as sustainable materials having wide applications in food packaging, separation, etc. Their preparation substantially relies on sufficient dissolution. Herein, various celluloses adequately dissolved in a new solvent system of carbon dioxide,1, 8-diazabicyclo [5.4.0] undec-7-ene and dimethyl sulfoxide (CO2/DBU/DMSO) were made in to films using different regeneration reagents. The films regenerated from ethanol and methanol presented homogeneous and smooth surfaces, while those from 5 wt % NaOH (aq.) and 5 wt % H2SO4 (aq.) showed rough surfaces, as analyzed using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The films regenerated from 5 wt % NaOH (aq.) and 5 wt % H2SO4 (aq.) rendered cellulose II structures, while those regenerated from alcohols had amorphous structures as evidenced using fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) results. The films made of microcrystalline cellulose had a good light transmittance of about 90% at 800 nm with a tensile strength of 55 MPa and an elongation break of 6.5%, while those from wood pulp cellulose demonstrated satisfactory flexibility with a tensile strength of 91 MPa and an elongation break of 9.0%. This research reports a simple, environmental, and sustainable method to prepare cellulose films of good mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Preparation of Cellulose Films from Sustainable CO2/DBU/DMSO System

Jin

Gan

et al. 2019

Polymers

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“…When the volume ratio of MCC:CL ranged from 9:1 to 4:6, the tensile strength of the film decreased from 35.3 ± 2.7 MPa to 13.9 ± 2.2 MPa, while the elongation at break increased from 8.60 ± 1.2% to 28.6 ± 2.7%. The reason for this decrease in the tensile strength of the MCC:CL biocomposite films may be attributed to the decrease in the crystallinity of the films ( Zhang et al, 2018 ). The results of the tensile strength of the biocomposite films are correlated with the changes of crystallinity studied before in this article ( The Crystal Structure Analysis of MCC:CL Biocomposite Films ).…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Chinese Leek Extract Incorporated Cellulose Composite Films

Zeng

Xiao

Zhang

et al. 2021

Front. Bioeng. Biotechnol.

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This study aimed to prepare microcrystalline cellulose (MCC) films with good mechanical properties via plasticization using a Chinese leek (CL, Allium tuberosum) extract. The microstructure, crystal structure, mechanical properties, barrier ability, and thermal properties of the films were investigated. The chemical structure analysis of CL extract showed the existence of cellulose, lignin, and low-molecular-weight substances, such as polysaccharides, pectins, and waxes, which could act as plasticizers to enhance the properties of MCC:CL biocomposite films. The results of scanning electron microscopy and atomic force microscopy analyses indicated the good compatibility between MCC and CL extract. When the volume ratio of MCC:CL was 7:3, the MCC:CL biocomposite film exhibited the best comprehensive performance in terms of water vapor permeability (2.11 × 10–10 g/m·s·Pa), elongation at break (13.2 ± 1.8%), and tensile strength (24.7 ± 2.5 MPa). The results of a UV absorption analysis demonstrated that the addition of CL extract improved the UV-shielding performance of the films. Therefore, this work not only proposes a facile method to prepare MCC films with excellent mechanical properties via plasticization using CL extract but also broadens the potential applications of MCC films in the packaging area.

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“…The XRD spectrum or raw populus exhibits three peaks at 15.9°, 23.1°, and 35.2° whereas those for extracted cellulose are observed at 15.1°, 22.1°, and 35.2°. Indeed, these peaks correspond to (110), (200), and (040) lattice planes of crystalline cellulose I [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

Extraction of Cellulose Polymeric Material from Populus tremula Fibers: Characterization and Application to the Adsorption of Methylene Blue and Crystal Violet

2021

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Cellulose is the most widely available biopolymer which is extensively used for several applications including textiles, composites, pharmaceutical, water treatment, etc. In this investigation, cellulose was chemically extracted from Populus tremula seed fibers. Samples were characterized using FT-IR, SEM, XRD, and TGA-DTA analyses. FT-IR spectrum of the extracted cellulose confirmed that hemicellulose and lignin were removed during alkali and bleaching treatments. SEM images showed the partially roughened surface of the fiber due to the removal of non-cellulosic elements and surface impurities during chemical modification. The crystallinity index values for untreated Populus tremula fibers and extracted cellulose were calculated to be 32.8% and 58.9%, respectively. The obvious increase in the crystallinity index for the extracted cellulose confirmed the removal of amorphous compounds present in raw populus. Alkali-treated populus fibers were more thermally stable than raw fibers. All changes observed after alkali and bleaching treatments evidenced the removal of amorphous contents and non-cellulosic components in raw populus fibers. Extracted cellulose exhibited excellent adsorption capacities of methylene blue (140.4 mg g−1) and crystal violet (154 mg g−1). The pseudo second order equation fitted well the kinetic data indicating a chemi-sorption process. The Freundlich model complied well with the experimental data suggesting that the adsorption of the studied dyes was multilayer.

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Preparation and Characterization of Regenerated Cellulose Film from a Solution in Lithium Bromide Molten Salt Hydrate

Cited by 63 publications

References 41 publications

Preparation of Cellulose Films from Sustainable CO2/DBU/DMSO System

Preparation of Cellulose Films from Sustainable CO2/DBU/DMSO System

Preparation and Characterization of Chinese Leek Extract Incorporated Cellulose Composite Films

Extraction of Cellulose Polymeric Material from Populus tremula Fibers: Characterization and Application to the Adsorption of Methylene Blue and Crystal Violet

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