A critical review of manufacturing processes used in regenerated cellulosic fibres: viscose, cellulose acetate, cuprammonium, LiCl/DMAc, ionic liquids, and NMMO based lyocell

Sayyed, Anwar J.; Deshmukh, Niteen A.; Pinjari, Dipak V.

doi:10.1007/s10570-019-02318-y

Cited by 259 publications

(175 citation statements)

References 87 publications

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“…Cellulose xanthogenate is unstable and can be regenerated to cellulose in acidic environment. This information is the theoretical basis of viscose fibers [35]. Cellulose xanthogenate can also be converted to cellulose through the hydrothermal process; hence, obtaining antibacterial AuNPs@VCSs by heating viscose containing HAuCl 4 ·nH 2 O is facile.…”

Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of Au Nanoparticles on Viscose Cellulose Sponges for Antibacterial Activities

et al. 2019

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Antibacterial viscose cellulose sponges (VCSs) were fabricated by heating cellulose xanthogenate (viscose) containing HAuCl4·nH2O. Viscose was used as the reducing agent and stabilizer for the in situ synthesis of Au nanoparticles (AuNPs) onto the VCSs. The morphology, structures, thermal properties, mechanical performance, and antibacterial activities of the sponges were investigated. Results indicate that AuNPs were uniformly immobilized in the VCSs, and the resulting complexes (AuNPs@VCSs) showed enhanced thermal stability and mechanical properties. Additionally, the AuNPs@VCSs exhibited remarkable antibacterial activities, with zone of inhibition diameter of 35.7 and 37.1 mm for Staphylococcus aureus and Escherichia coli, respectively. The process is simple and applicable at the industrial level and can be applied to the fields of cleaning and sanitation.

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Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of Au Nanoparticles on Viscose Cellulose Sponges for Antibacterial Activities

et al. 2019

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“…Cellulose is the most abundant and renewable natural biopolymer on earth and due to its particular molecular structure has unique chemical and physical properties, such as high thermostability and excellent mechanical capabilities (Nishino et al 1995;Zhang et al 2017). Therefore, cellulose has gained increasing attention as a replacement material for a number of finite fossil fuel products (Jiang et al 2019;Sayyed et al 2019). Due to the highly crystalline structure, abundant intra and intermolecular hydrogen bonds and the hydrophobic interactions between rings, cellulose is insoluble in water and in most organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Dissolution of cotton by 1-ethyl-3-methylimidazolium acetate studied with time–temperature superposition for three different fibre arrangements

et al. 2020

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This study has investigated the dissolution of cotton fibres in the ionic liquid 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) for three fibre arrangements. Dissolution was carried out with excess [C2mim][OAc] at various temperatures and times followed by coagulation with water. Optical microscopy (OM) of the resulting processed and dried cotton fibres indicated that this procedure produced a coagulated fraction surrounding the original fibres. X-ray diffraction (XRD) showed that the crystal structure of this coagulated fraction was predominantly cellulose II, as opposed to the original fibres—mostly cellulose I. The OM and XRD results showed that growth of the coagulated fraction obeyed time–temperature superposition (TTS) and displayed an Arrhenius behaviour allowing a dissolution activation energy to be determined. Although the growth of the coagulated fraction with time were different for these distinct three arrangements, all could be individually shifted to form master curves using TTS, leading to very similar activation energies, 96 ± 3 kJ/mol (23 ± 1 kcal/mol). Graphic abstract

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“…Research in cellulose-based regenerated fibers has been largely driven by the textile industry. Regenerated cellulosic fibers utilize natural cellulose as the raw material and are processed by either direct dissolution or by derivatizing cellulose [64]. In non-derivatizing process, cellulose is directly dissolved without modification; cuprammonium, LiCl/DMAc and Lyocell (with NMMO solvent or ionic liquids) are examples of this process.…”

Section: Cellulosic Precursors For Cmsmmentioning

confidence: 99%

Cellulose-Based Carbon Molecular Sieve Membranes for Gas Separation: A Review

2020

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In the field of gas separation and purification, membrane technologies compete with conventional purification processes on the basis of technical, economic and environmental factors. In this context, there is a growing interest in the development of carbon molecular sieve membranes (CMSM) due to their higher permeability and selectivity and higher stability in corrosive and high temperature environments. However, the industrial use of CMSM has been thus far hindered mostly by their relative instability in the presence of water vapor, present in a large number of process streams, as well as by the high cost of polymeric precursors such as polyimide. In this context, cellulosic precursors appear as very promising alternatives, especially targeting the production of CMSM for the separation of O2/N2 and CO2/CH4. For these two gas separations, cellulose-based CMSM have demonstrated performances well above the Robeson upper bound and above the performance of CMSM based on other polymeric precursors. Furthermore, cellulose is an inexpensive bio-renewable feed-stock highly abundant on Earth. This article reviews the major fabrication aspects of cellulose-based CMSM. Additionally, this article suggests a new tool to characterize the membrane performance, the Robeson Index. The Robeson Index, θ, is the ratio between the actual selectivity at the Robeson plot and the corresponding selectivity—for the same permeability—of the Robeson upper bound; the Robeson Index measures how far the actual point is from the upper bound.

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A critical review of manufacturing processes used in regenerated cellulosic fibres: viscose, cellulose acetate, cuprammonium, LiCl/DMAc, ionic liquids, and NMMO based lyocell

Cited by 259 publications

References 87 publications

In Situ Synthesis of Au Nanoparticles on Viscose Cellulose Sponges for Antibacterial Activities

In Situ Synthesis of Au Nanoparticles on Viscose Cellulose Sponges for Antibacterial Activities

Dissolution of cotton by 1-ethyl-3-methylimidazolium acetate studied with time–temperature superposition for three different fibre arrangements

Cellulose-Based Carbon Molecular Sieve Membranes for Gas Separation: A Review

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