Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process

Liu, Yanrong; Nie, Yi; Pan, Fengjiao; Zhou, Le; Ji, Xiaoyan; Kang, Zhaoqing; Zhang, Suojiang

doi:10.1016/j.molliq.2019.111127

Cited by 27 publications

(10 citation statements)

References 42 publications

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“…Ionic liquids (ILs), a group of salts that exist in liquid state near room temperature, possessing advantages of high chemical and thermal stability, low volatility, and adjustable properties, have the brilliant capacity of dissolving natural and synthetic polymers, such as cellulose, , chitosan, keratin, , and polyacrylonitrile (PAN) , based on hydrogen bond theory. − Our laboratory has successfully developed a process for preparing regenerated cellulose fibers using ILs as solvents. − On this basis, we also studied a new technology of preparing melamine flame-retardant fibers using ILs as solvents and water-insoluble MF resin prepolymer (pre-MF) as flame-retardant material. In view of the variety of ILs, the workload of direct experiment screening is too large.…”

Section: Introductionmentioning

confidence: 99%

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Chen

Sun

et al. 2020

ACS Sustainable Chem. Eng.

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The melamine fiber has been widely used because of its excellent flame retardancy. We tried to fabricate melamine fibers using ionic liquids (ILs) as solvents, melamine formaldehyde resin prepolymer (pre-MF) as flameretardant material, and cellulose as the supporter. The best ILs for dissolving water-insoluble pre-MF were screened by COSMO-RS, in view of the richness of ILs and the complexity of pre-MF. The logarithmic activity coefficients (ln γ) of three models were calculated to evaluate the dissolution ability of pre-MF in 432 ILs. According to the results of ln γ and excess enthalpies, anions play a leading role in the dissolution process of pre-MF in ILs, while cations have little effect on it. The solubility experiments of pre-MF in 8 ILs were determined, which are consistent with the trend of ln γ predicted. It is important that the ILs composed of OAc

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Section: Introductionmentioning

confidence: 99%

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Chen

Sun

et al. 2020

ACS Sustainable Chem. Eng.

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“…Figure S3 shows that the XRD pattern of RCF presents the main peaks of the two planes corresponding to 20.2° (110) and 21.5° (020), which are part of the structure of cellulose II . The RCF and composite RCFs have no new feature peaks.…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Cellulose Fibers Spun from Ionic Liquid and Enriched with Plant Essential Oils

Zhou

Kang

et al. 2022

ACS Appl. Polym. Mater.

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The COVID-19 outbreak has seen the widespread use of personal protective equipment, especially antibacterial fibers. In this work, ionic liquid (IL) is used as a solvent to fabricate antibacterial fibers combining plant essential oils (PEOs) with cellulose. PEOs are buried in microcapsules first or mixed directly with IL-cellulose spinning dopes to prepare a series of composite fibers. The internal structures, surface and cross morphologies, thermal stability, mechanical properties, antibacterial activity, washing stability, and biocompatibility of these fibers are investigated and analyzed in-depth further. Artemisia microcapsule fiber (AMC-RCF) with a break strength of 30.07 MPa is obtained. Besides, the antibacterial activity rates of AMC-RCF against Escherichia coli and Staphylococcus aureus are 89.8 and 97.8%, and the fibers still have a long-lasting antibacterial effect after 30 standard washes. Furthermore, the antibacterial fibers exhibit excellent biocompatibility. This research provides a green approach for the fabrication of the antibacterial fibers with long-lasting antibacterial activity and good biocompatibility.

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“…Wang et al found that ILs with quaternary ammonium salts, imidazoles, and pyridines as cations can dissolve cellulose. According to the work of Liu et al , the anions of Ac – , Dec – , HCOO – , Cl – , BEN – , DMPO 4 – , DEP – , DBP – , and Br – combined with methylimidazolium-based, pyridinium-based, ethylmorpholinium-based, and methylpyrrolidinium-based cations, which have the functional groups ethyl, allyl, 2-hydroxylethyl, 2-methoxyethyl, and acryloyloxy propyl ILs, exhibited excellent properties of cellulose dissolution. The research studies of Kuzmina et al and Liu et al concluded that the superbase ILs based on azabicyclo have enormous potential to dissolve biomass.…”

Section: Methodsmentioning

confidence: 99%

“…Wang et al 27 found that ILs with quaternary ammonium salts, imidazoles, and pyridines as cations can dissolve cellulose. According to the work of Liu et al, 28 S1 and S2). Then, their abilities of dissolving thymol, quercetin, and aloe-emodin were evaluated by COSMO-RS.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Screening Ionic Liquids by the COSMO-RS Method for the Preparation of Antibacterial Cellulose Fibers

Gao

Zhou

et al. 2021

ACS Sustainable Chem. Eng.

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The application of natural antibacterial agents seems to be one of the popular research topics in the field of antibacterial materials due to their unique properties such as good biocompatibility and biodegradability. In this work, 1-ethyl-3-methylimidazolium diethylphosphate ([Emim]DEP) with a better ability to dissolve three natural antibacterial agents (thymol, quercetin, and aloeemodin) was screened out from 195 kinds of ILs formed by 13 cations and 15 anions using the conductor-like screening model for real solvents method. The antibacterial cellulose fibers were prepared using cellulose and three natural antibacterial agents as raw materials and [Emim]DEP as the solvent. The results indicated that three natural antibacterial agents are successfully added into the corresponding antibacterial cellulose fibers according to the Fourier transform infrared, X-ray diffraction, and thermogravimetric analysis data. The scanning electron microscopy results suggested that the antibacterial cellulose fibers have smooth and uniform surfaces. Moreover, the thymol/cellulose antibacterial fibers (TCFs) could inhibit more than 92.3% of E. coli and 90.2% of S. aureus when the content of thymol is 25 wt % and the breaking strength and breaking elongation of the TCFs are up to 580 MPa and 13.8%, respectively. In addition, after 15 times of standard washing in water, the TCFs still have more than 75% antibacterial activities against E. coli and S. aureus.

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Study on ionic liquid/cellulose/coagulator phase diagram and its application in green spinning process

Cited by 27 publications

References 42 publications

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Antibacterial Cellulose Fibers Spun from Ionic Liquid and Enriched with Plant Essential Oils

Screening Ionic Liquids by the COSMO-RS Method for the Preparation of Antibacterial Cellulose Fibers

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