Structure - Properties Interrelationships in Multicomponent Solutions Based on Cellulose and Fibers Spun Therefrom

Голова, Л. К.; Makarov, Igor; Kuznetsova, Elena Plotnikova Ludmila; Куличихин, В. Г.

doi:10.5772/51688

Cited by 6 publications

(6 citation statements)

References 8 publications

(8 reference statements)

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“…Cellulose dissolution occurs under triaxial compression, shearing, and forced plastic flow. Then, under temperature (105°C) and shear rate, the cellulose dissolves into a highly homogeneous and concentrated solution ( Golova et al, 2013 ). This method has been successfully used with BNC fibers with a DP of ∼1500 and a solid-phase activation of BNC and NMMO (water < 10%); the mixture was heated at 120°C until a fluid solution was obtained ( Makarov et al, 2019 ).…”

Section: Technologies For the Production Of Cellulose Textile Fibersmentioning

confidence: 99%

See 1 more Smart Citation

Trends on the Cellulose-Based Textiles: Raw Materials and Technologies

Felgueiras

Azóia

Gonçalves

et al. 2021

Front. Bioeng. Biotechnol.

103

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There is an emerging environmental awareness and social concern regarding the environmental impact of the textile industry, highlighting the growing need for developing green and sustainable approaches throughout this industry’s supply chain. Upstream, due to population growth and the rise in consumption of textile fibers, new sustainable raw materials and processes must be found. Cellulose presents unique structural features, being the most important and available renewable resource for textiles. The physical and chemical modification reactions yielding fibers are of high commercial importance today. Recently developed technologies allow the production of filaments with the strongest tensile performance without dissolution or any other harmful and complex chemical processes. Fibers without solvents are thus on the verge of commercialization. In this review, the technologies for the production of cellulose-based textiles, their surface modification and the recent trends on sustainable cellulose sources, such as bacterial nanocellulose, are discussed. The life cycle assessment of several cellulose fiber production methods is also discussed.

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Section: Technologies For the Production Of Cellulose Textile Fibersmentioning

confidence: 99%

“…FIGURE 7 | Schematic phase diagram of the cellulose-MMO-H 2 O system: (line CBA) variation in the composition of the system during cellulose dissolution via the traditional MMO process; (closed circles) composition of the system during cellulose dissolution via the solid-phase MMO process; (I) MMO monohydrate and (II) MMO 2.5-hydrate(Golova et al, 2013).…”

mentioning

confidence: 99%

Trends on the Cellulose-Based Textiles: Raw Materials and Technologies

Felgueiras

Azóia

Gonçalves

et al. 2021

Front. Bioeng. Biotechnol.

103

View full text Add to dashboard Cite

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“…Numerous narrow peaks characteristic of crystalline compounds are observed in the obtained diffraction pattern. The angular position of these reflections, as can be seen in Figure 4 (Curve 1), differs from 2θ for NMMO (Curve 2) [43]. This indicates the formation by the molecules of IBA with NMMO of the additive compound, crystallosolvates [37].…”

Section: Structure and Morphology Of The Solvent And Precursorsmentioning

confidence: 99%

The Effect of Alcohol Precipitants on Structural and Morphological Features and Thermal Properties of Lyocell Fibers

Makarov

Голова

Vinogradov

et al. 2020

Fibers

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This research examines the possibilities of regulating the structure of cellulose precursor fibers spun from solutions in N-methylmorpholine-N-oxide when replacing aqueous coagulation baths with thermodynamically softer alcohol baths at different temperatures. The fibers were spun by the dry jet–wet method in isobutanol coagulation baths with a temperature of 25 °C and 70 °C. The study of the phase state of the solvent–coagulant system using viscometry and point cloud methods revealed the temperature-concentration regions of the single-phase and two-phase states of the system. Using elemental analysis, DSC (differential scanning calorimetry) and XRD (X-ray diffraction) methods, it was shown that just spun fibers, due to the presence of a residual amount of solvent and coagulant in them, regardless of the temperature of the precipitator, have an amorphous structure. Additional washing with water completely washed away the solvent and coagulant as well, however, the structure of cellulose changes slightly, turning into a defective amorphous-crystalline one. A relationship was found between the phase composition, structure, and properties of just spun fibers and precursors washed with water. Thus, the loss of structural ordering of both just spun and washed cellulose fibers leads to a decrease in strength characteristics and an increase in deformation. The thermal behavior of the fibers is determined by their phase composition. Fibers just spun into hot alcohol containing a coagulant and traces of solvent acquire thermal stability up to 330 °C. During the pyrolysis of the obtained precursors up to 1000 °C, the value of the carbon yield doubles. The amorphized structure of the obtained fibers allows us to consider it as a model when analyzing the transformation of the structure of precursors during thermolysis.

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“…It has an inherent advantage in that the starting material, cellulose (Figure 7), is a renewable natural resource [66] widely produced from processed wood pulp (Figure 2a) dictating the current market source with intense research focused on various other renewable materials as feedstock [5][6][7]. Cellulose acetate is currently being used in fiber or film processing; however, it has been reported [67] to have high glass transition temperature which limits its thermal processing. Current applications of cellulose acetate include textiles, cigarette tow, lacquers, cellulose films, and in food packaging [68,69].…”

Section: Cellulose Polymersmentioning

confidence: 99%

“…personal protective garments. Cellulose acetate is broadly classified into two types:-cellulose diacetate and cellulose triacetate with acetyl values of approximately 55% (degree of substitution: 2.4) and 61% (degree of substitution: 2.9), respectively [67]. This type of biopolymer, sourced from a variety of renewable materials could undoubtedly revolutionize the polymer industry in just the near future owing to its versatility in chemical modification for better physicochemical qualities.…”

Section: Cellulose Polymersmentioning

confidence: 99%

Spectroscopic Characterization of Multilayered Functional Protective Polymers via Surface Modification with Organic Polymers against Highly Toxic Chemicals

Ndibewu¹,

Ngobeni²,

Lefakane³

et al. 2016

Recent Advances in Biopolymers

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Recent advances in biopolymers, including functional biomaterials for the manufacture of personal protective garments (PPGs) or equipment (PPE) have dramatically improved their efficiency and performance. Good and acceptable permeation characteristics, mechanical strength and durability are common attributes of these materials simultaneously without compromise for their cost-effectiveness and manufacturability. The comprehensive characterization of these materials and specimens' three-dimensionality with the endeavor to obtain the highest resistance to highly toxic agents such as nuclear, chemical and biological warfare agents is the must fulfilling aim in today's global interest in continuous development in this area. Because energy absorption component seems to be important in considering quality the requirements related to the application of most protective materials (e.g. clothing), spectroscopy would seem to be the cornerstone to be considered for most analytical purposes to supplement the qualitative and quantitative assessment of polymeric materials. The major techniques worth mentioning include: scanning electron microscopy coupled to Xray dispersive spectroscopy (SEM/EDS), atomic force microscopy (AFM), scattering-type near-field optical microscopy, scanning tunneling microscopy (STM), attenuated total reflectance Fourier transform spectroscopy (ATR-FT-IR), infrared spectroscopic ellipsometry, nano-FTIR absorption spectroscopy, near-field optical microscopy, and infrared vibrational nano-spectrosocopy. This chapter will discuss the importance of a particularly important natural polymer (cellulose) containing acetyl groups to form modifiable biopolymers (e.g. cellulose acetate polymers), doped to yield multi-layered functional protective materials (MFPMs) or composites (MFPCs). The ultimate aim seeks to provide critical insights into understanding the enhancement of their permeation characteristics against exposure to toxic industrial chemicals, including chlorine which is currently being used as a chemical warfare agent of choice in the Syrian conflict. MFPMs or MFPCs are a group of materials made from a combination of fiber or polymers together with varying amounts of additives possessing tailored physical and mechanical properties. Many of these materials should not only be durable but also must provide cost-competi

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Structure - Properties Interrelationships in Multicomponent Solutions Based on Cellulose and Fibers Spun Therefrom

Cited by 6 publications

References 8 publications

Trends on the Cellulose-Based Textiles: Raw Materials and Technologies

Trends on the Cellulose-Based Textiles: Raw Materials and Technologies

The Effect of Alcohol Precipitants on Structural and Morphological Features and Thermal Properties of Lyocell Fibers

Spectroscopic Characterization of Multilayered Functional Protective Polymers via Surface Modification with Organic Polymers against Highly Toxic Chemicals

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