Electrospun meta-aramid/cellulose acetate and meta-aramid/cellulose composite nanofibers

Yao, Lirong; Lee, Changhwan; Kim, Jooyong

doi:10.1007/s12221-011-0197-y

Cited by 21 publications

(9 citation statements)

References 14 publications

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“…Since cellulose is insoluble in LiCl/DMAc solutions at room temperature, we used a method involving swelling followed by solvent exchange 49 . Cellulose powder (4 g) was suspended overnight in 100 mL dH 2 O, and ethanol was added to replace water.…”

Section: Methodsmentioning

confidence: 99%

Enhancing cellulose functionalities by size reduction using media-mill

Dubey

Toh

Yeh

2018

Sci Rep

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This study explored the feasibility of enhancing cellulose functionalities by using media milling to reduce the size of cellulose particles, and assayed various physicochemical and physiological properties of the resulting cellulose. Cellulose has been recognized as dietary fiber by USFDA due to its health benefits. However, its properties like low degradability, stiff texture, and insolubility in water limits its applicability in foods. Milling reduced the volume mean size of cellulose from 25.7 μm to 0.9 μm, which in turn increased the specific surface area (36.78-fold), and swelling capacity (9-fold). Conversely, a reduction in the bulk density (1.41 to 1.32 g/mL) and intrinsic viscosity (165.64 to 77.28 mL/g) were found. The milled cellulose also had significantly enhanced capacity for holding water and binding bile acids and sugars. Moreover, the size reduction also resulted in increased fermentability of cellulose into short chain fatty acids using three human fecal microflora samples. The increase in production of acetate (2880.60%), propionate (2738.52%), and butyrate (2865.89%) after fermentation of cellulose for 24 h were significantly enhanced by size reduction. With these improved characteristics, the milled cellulose might have beneficial physiological effects including laxation as well as reduced blood cholesterol and glucose attenuation.

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Section: Methodsmentioning

confidence: 99%

Enhancing cellulose functionalities by size reduction using media-mill

Dubey

Toh

Yeh

2018

Sci Rep

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“…Therefore, the electrospinning process used a high electric field to defeat the surface tension of the solutions. Therefore, the power supply volt must increase to defeat the increased surface tension, this leads to decrease the diameter of the fibers as a result of the higher rate of the electrostatic stretching and the increased in whipping motion, and Figure a shows the distribution of fiber diameters with the power supply volt. In addition, the increase in CNT content needs to reduce the flow rate of the pump to produce the fibers, which cause a decrease in fiber diameter due to the low charge density of the solution and the high electrostatic stretching rate, and Figure b shows the distribution of fiber diameters with the pump flow rate.…”

Section: Resultsmentioning

confidence: 99%

“…Cellulose acetate (CA) is derivative from cellulose and can obtain easily from different natural sources such as the tree bulb. CA is the most favorable polymer for electrospinning this due to its advantages such as high flexibility and durability, chemical resistance, good mechanical strength, and good solubility in organic solvents . Therefore, using cellulose acetate attracts the researcher for producing composite nanofibers …”

Section: Introductionmentioning

confidence: 99%

Characterization and mechanical properties of cellulose acetate/carbon nanotube composite nanofibers

et al. 2017

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Cellulose acetate/carbon nanotube composite nanofibers were prepared using electrospinning technique. The morphology, crystalline, and mechanical properties were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and tensile test. The result indicated that the CA with 0.5 wt% CNT shows better mechanical properties among the other sample which contains lower or higher percent of CNT. In addition, the diameter of the average fibers was 415 ± 45 nm and shows good dispersions of CNT into the nanofibers. Moreover, tensile strength and Young's modulus were enhanced with an average of 67% and 78%, respectively. K E Y W O R D Scarbon nanotubes, cellulose acetate, composite nanofibers, electrospinning, mechanical properties

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“…With regard to the fabrication of ANF by electrospinning, recent studies have mostly focused on the preparation of meta‐aramid nanofiber (mANF) that can be commonly achieved through electrospinning in a dimethylacetamide (DMAc)/LiCl system. [ 39–44 ] However, only strong acids such as concentrated sulfuric acid (H 2 SO 4 ) can be used to dissolve PPTA fiber, which leads to severe equipment corrosion. As shown in Figure A, Yao et al [ 34 ] reported electrospinning of ANF in a PPTA/H 2 SO 4 solution at high temperature (85 °C) and under a high voltage (25 kV), which suffered from significant challenges in terms of control over the electrospinning process due to the high concentration of the PPTA/H 2 SO 4 solution and the high voltage applied (an electric field strength of 4 kV cm −1 ), resulting in branched ANF with a wide diameter distribution (275 nm–15 µm).…”

Section: Fabrication Methods Of Anfmentioning

confidence: 99%

Fabrication, Applications, and Prospects of Aramid Nanofiber

Yang

Wang

Zhang

et al. 2020

Adv Funct Materials

270

175

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Aramid nanofibers (ANFs) are of great interest in various applications due to its 1D nanoscale, high aspect ratio, high specific surface area, excellent strength, and modulus as well as impressive chemical and thermal stabilities. It is considered as one of the most promising nano-sized building blocks with excellent properties and has therefore drawn increasing attention since 2011. However, no review has summarized the research progress and the prospective challenges of ANF. Herein, the methods of ANF fabrication and their relative merits are comprehensively discussed together with the challenges and progress in the deprotonation method for preparing ANF. The fabrication methods and development of ANF-based advanced materials with different macroscopic morphologies, including the 1D ANF aerogel fiber, 2D ANF film/nanopaper/coating, and 3D ANF gel and particle are also described. Furthermore, the applications of ANF in nanocomposite reinforcement, battery separators, electrical insulation nanopaper, flexible electronics, and adsorption and filtration media are presented. Additionally, the possible challenges and outlooks toward the future development of ANF are highlighted. This review indicates that the ANF and ANF-based materials mentioned herein will boost the development of next-generation advanced functional materials.

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Electrospun meta-aramid/cellulose acetate and meta-aramid/cellulose composite nanofibers

Cited by 21 publications

References 14 publications

Enhancing cellulose functionalities by size reduction using media-mill

Enhancing cellulose functionalities by size reduction using media-mill

Characterization and mechanical properties of cellulose acetate/carbon nanotube composite nanofibers

Fabrication, Applications, and Prospects of Aramid Nanofiber

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