Preparation of transparent film via cellulose regeneration: Correlations between ionic liquid and film properties

Zheng, Xin; Huang, Fang; Chen, Lihui; Huang, Liulian; Cao, Shilin; Ma, Xiaojuan

doi:10.1016/j.carbpol.2018.09.060

Cited by 68 publications

(56 citation statements)

References 34 publications

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“…There are few reports of using TMG ionic liquids for cellulose dissolution and none report the regeneration of the material to films formation. Besides that, the use of industrial pulp is rarely reported even though this material presents the most interest from an industrial point of view [ 15 , 29 , 30 ]. After cellulose dissolution at 90 °C the regeneration process with water was evaluated [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

“…All regenerated cellulose films appear to have an amorphous structure. ( Figure 6 —spectra b, c, d) The XRD profiles showed a less intense and very broad peak at around 16° (black arrow in XRD profile) and a distinguishable peak at 24° which represents the same diffraction pattern of cellulose II crystalline structure [ 30 ]. It is clear from the results obtained during the dissolution and regeneration process that cellulose loose crystallinity and the small crystallinity developed during regeneration is typical of cellulose II.…”

Section: Resultsmentioning

confidence: 99%

“…It is known that the tensile strength is dependent on the intermolecular interactions and crystallinity [ 30 ]. Due to the heterogeneity of cellulose chains, a lower degree of stacking and orientation in cellulose chains can lead to a poor distribution of stress, as well as a low elongation at break.…”

Section: Resultsmentioning

confidence: 99%

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Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

et al. 2021

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Due to environmental concerns, more attention has been given to the development of bio-based materials for substitution of fossil-based ones. Moreover, paper use is essential in daily routine and several applications of industrial pulp can be developed. In this study, transparent films were produced by industrial cellulose pulp solubilization in tetramethylguanidine based ionic liquids followed by its regeneration. Films were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), UV/Vis spectroscopy, proton nuclear magnetic resonance (1H-NMR), dynamic scanning calorimetry (DSC), thermal analysis (TG), and X-ray diffraction (XRD). Mechanical tests showed that films have a good elongation property, up to 50%, depending on ionic liquid incorporation. The influence of the conjugated acid and dissolution temperature on mechanical properties were evaluated. These results revealed the potential of this methodology for the preparation of new biobased films.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

et al. 2021

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“…Zheng et al investigated preparation of cellulose films from cellulose (DP~400) dissolved in 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]), 1-allyl-3-methylimidazolium chloride ([Amim][Cl]), and 1-ethyl-3-methylimidazolium acetate ([Emim][Ac]) solvent arrangements. The tensile strength and transmittance of films were in the order of [Amim][Cl] > [Bmim][Cl] > [Emim][Ac], and the maximum tensile strength and transmittance reached 152±30 MPa and 90±3%, respectively [16]. Wang et al used choline chloride/urea (ChCl/urea), a deep eutectic solvent (DES), as both a solvent and a plasticizer to prepare cellulose film with a high elongation break (34.88%) [17].…”

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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“…The detailed procedure was described in our previous work. 25 The nal cellulose lm was with a roughness of R a 2.36 nm and a high light transmittance of $90%.…”

Section: Preparation Of Cellulose Lmsmentioning

confidence: 99%

Cellulose transparent conductive film and its feasible use in perovskite solar cells

Deng

Wang

et al. 2019

RSC Adv.

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Preparation of transparent film via cellulose regeneration: Correlations between ionic liquid and film properties

Cited by 68 publications

References 34 publications

Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

Process Development for Flexible Films of Industrial Cellulose Pulp Using Superbase Ionic Liquids

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

Cellulose transparent conductive film and its feasible use in perovskite solar cells

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