Preparation and High Performance of Cellulose Acetate Films by Grafting with Imidazole Ionic Liquid

Xu, Shuangping; Zhou, Hailiang; Jia, Hongge; Xu, Jingyu; Ma, Liqun; Zang, Yu; Jiang, Pengfei; Ma, Wenqiang; Zhang, Yushu; Zhao, Wenwen; Wang, Xintian; Zhao, Shichao; Zou, Yonglan; Zha, Yuxin

doi:10.1021/acsomega.0c06361

Cited by 17 publications

(11 citation statements)

References 40 publications

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“…[28], [29] All these results revealed the successful synthesis of cellulose acetate in the IL, leaving no traces of the ILs used in the nal product. The FTIR spectra of the prepared cellulose phthalate are presented in Fig.…”

Section: Percentage Yield and Degrees Of Substitution Of Cellulose De...mentioning

confidence: 96%

Characterization of Synthesized Cellulose Derivatives in 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid

Baker

2022

Preprint

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To obtain pure holocellulose, cellulosic wastes were chemically pretreated. Depending on the derivatizing agents used, the dissolution and functionalization of various holocelluloses obtained in 1-butyl-3-methylimidazolium chloride [BIMIM]Cl ionic liquid using different derivatizing agents such as cellulose acetate, cellulose phthalates, and cellulose ether. Cold acetone and dichloromethane were used to regenerate the dissolved product in ionic liquids, and the resulting ionic liquids were reused.The degree of substitution (DS) of the products obtained ranged from 1.00 to 2.77 at 100°C. FTIR analysis revealed important absorption bands which include: (C = O at ~ 1750 cm− 1, SP3 –CO at ~ 1250cm− 1, SP2 –CO at 1100cm− 1, for esters of cellulose acetate and phthalate, Aromatic –CH stretching at 1577cm− 1 for cellulose phthalate and –CO-CH2CH3 at 1720cm− 1 with the absence of SP2 bending frequency at 1250cm− 1 which confirms the successful synthesis of ethyl cellulose). XRD showed values at (2θ= ~14.5°, 17.0°, 22.7° and 34.5°) for all samples. Comparison of SEM images of the cellulose and derivatives showed little or no destruction of the fibre strands while EDS revealed C and O as (Elemental composition of all samples. Thermogravimetric analysis (TGA/DTA) showed the derivatives possessed higher thermal stability that the starting materials thus, producing materials with better application. All these revealed a successful extraction and purification of cellulose from wastes as well as the synthesis of cellulose derivatives.

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Section: Percentage Yield and Degrees Of Substitution Of Cellulose De...mentioning

confidence: 96%

Characterization of Synthesized Cellulose Derivatives in 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid

Baker

2022

Preprint

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“…The surface morphology of the pure CA membrane was observed to be defect-free, smooth, and flat, which is a commonly reported characteristic feature in the literature. 15,19,20 The morphology of the composite membranes at various IL loadings without the application of an electric field, shown in Figure 7 1 b, Figure 7 2 b, and Figure 7 3 b, revealed a smooth and uniform surface. Notably, there were no discernible differences in surface images between the pristine CA and CA-ILs membranes at various loads.…”

Section: Membrane Crystallinitymentioning

confidence: 99%

Electro-casting for Superior Gas Separation Membrane Performance and Manufacturing

Alkandari,

Castro-Dominguez

2023

ACS Appl. Mater. Interfaces

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Gas separation polymer membranes play a pivotal role in various industrial processes including carbon capture and hydrogen production. However, the inherent trade-off between permeability and selectivity coupled with challenges in membrane manufacturing has hindered their widespread industrial deployment. To address the permselectivity challenges, researchers have explored increasingly complex polymers, composite systems, and other materials. In this study, we introduce a novel membrane manufacturing technique called “electro-casting” that not only enables efficient membrane fabrication but also enhances the trade-off of traditional polymer-based membranes. We fabricated cellulose acetate (CA) membranes embedded with 1-ethyl-3-methyl imidazolium via electro-casting and performed a comparative analysis of structural, morphological, and gas transport characteristics against membranes made via conventional casting techniques. We discovered that electro-casted membranes exhibited a unique crystalline structure, surface topology that induced a remarkable 200% improvement in CO 2 /N 2 selectivity and a 110% increase in CO 2 /CH 4 selectivity. The electric field generated during the manufacturing process played a crucial role in altering the supramolecular structure of the polymer, thereby increasing the separation properties of the membranes as well as their thermal and mechanical features. Electro-casting induced a polymer crystallization effect that disrupted the permeability-selectivity trade-off observed in conventional membranes, while producing highly stable membranes. Moreover, the simplicity of this manufacturing method and its significant impact on membrane properties have the potential to accelerate the deployment of gas separation membranes, facilitating the transition toward a NetZero chemical industry.

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“…Synthetic membranes are useful for desalination, dialysis, sterile filtration, food processing, dehydration of air, and other industrial, medical, and environmental applications because of their energy requirements, compact design, and mechanical simplicity. In addition, biopolymer cellulose membrane can be used instead of synthetic membranes because they have similar characteristics [15][16][17]. Recently, we developed a novel method for CO 2 fixation and storage [18].…”

Section: Comentioning

confidence: 99%

Pilot Plant Model for Sequential CO2 Fixation and Storage

Kenji¹

2022

Adv Environ Stud

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Preparation and High Performance of Cellulose Acetate Films by Grafting with Imidazole Ionic Liquid

Cited by 17 publications

References 40 publications

Characterization of Synthesized Cellulose Derivatives in 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid

Characterization of Synthesized Cellulose Derivatives in 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid

Electro-casting for Superior Gas Separation Membrane Performance and Manufacturing

Pilot Plant Model for Sequential CO2 Fixation and Storage

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