Lyocell fibers as the precursor of carbon fibers

Peng, Shunjin; Shao, Huili; Hu, Xuechao

doi:10.1002/app.12879

Cited by 88 publications

(56 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1). The crystallinity of untreated Lyocell cellulose was calculated to be 61% from the X-ray diffraction patterns, which was reasonable according to the published values of about 64.04% and 72.56% for Lyocell-I and Lyocell-II, respectively (Peng et al 2003). A reason the crystallinity of fiber and fibril aggregate mixture went up with the treatment time increasing may be that some of the amorphous cellulose were degraded and removed during the mechanical treatment.…”

Section: Morphology Of Fibers and Fibril Aggregatesmentioning

confidence: 99%

Physical and mechanical properties of polyvinyl alcohol and polypropylene composite materials reinforced with fibril aggregates isolated from regenerated cellulose fibers

et al. 2007

View full text Add to dashboard Cite

Natural fibers in micro and nano scales may be a potential alternative for man-made fibers because of the comparable mechanical properties to those of glass, carbon, and aramid fibers. Cellulose fibril and fibril aggregate are generally prepared by physical treatments, e.g., high-pressure homogenizer, or chemical treatments, e.g., acid hydrolysis. In this study, fibril aggregates were generated from a regenerated cellulose fiber by a novel mechanical treatment. The geometrical characteristics of the fibers and the fibril aggregates were investigated using scanning electron microscopy (SEM) and polarized light microscopy (PLM), and its crystallinity was investigated by wide angle X-ray diffraction (WAXD). The degree of fibrillation of the fibers was indirectly evaluated by water retention value (WRV). Nano-biocomposites reinforced with fibril aggregates were prepared by film casting and compression molding and evaluated by tensile test. The morphological characteristics of the nanocomposites were investigated with SEM and PLM. As reference, commercial microfibrillated cellulose was also used to reinforce biodegradable polymer.

show abstract

Section: Morphology Of Fibers and Fibril Aggregatesmentioning

confidence: 99%

Physical and mechanical properties of polyvinyl alcohol and polypropylene composite materials reinforced with fibril aggregates isolated from regenerated cellulose fibers

et al. 2007

View full text Add to dashboard Cite

show abstract

“…where Dn is the birefringence of regenerated cellulose fibers, W c,x is the crystallinity, Dn co and Dn ao are the birefringence of the crystalline regions and amorphous regions, respectively, and Dn co = Dn ao = 0.0545 (Peng et al 2003). X-ray scattering (SAXS) profiles were carried out at 16B1 Beamline station in Shanghai Synchrotron Radiation Facility (SSRF).…”

Section: Recovery Of [Bmim]clmentioning

confidence: 99%

Analysis of regenerated cellulose fibers with ionic liquids as a solvent as spinning speed is increased

et al. 2012

View full text Add to dashboard Cite

In order to improve the spinning efficiency, the spinning experiments with cellulose/1-butyl-3-methylimidazolium chloride solution were done whilst increasing spinning speed. It was found that the tenacity and initial modulus of regenerated cellulose fibers increased but the elongation at break decreased slightly with increasing spinning speed at constant draw ratio. Further, the synchrotron wideangle X-ray diffraction and small-angle X-ray scattering were carried out to illustrate the relationship between the structure and the mechanical properties. It was shown that the crystal orientation, crystallinity, amorphous orientation factor as well as orientation of the microvoids along the fiber increased with the spinning speed as the diameter of the microvoids in the fiber decreased. From the analysis of the spinline stress, it is clear that the spinline stress increased when both extruding and draw speed increased at constant draw ratio. This resulted in the improvement of supramolecular structure and mechanical properties of the regenerated cellulose fibers.

show abstract

“…It may be expected that carbonized cellulose nanocomposite fibers containing graphene would possess better mechanical properties than those of neat cellulose-based carbon fibers. Regenerated cellulose-based carbon fibers are used almost exclusively in ablative applications, such as space flight and aviation, reentry vehicle nose tips, heat shields, solid rocket motor nozzle, and exit cones [30][31][32]. In addition, because of the high electrical conductivity of graphene, conductive cellulose/graphene nanocomposites may potentially be used in portable and bendable electronic equipment such as rollup display and wearable devices [20,33].…”

Section: Introductionmentioning

confidence: 99%

Graphene reinforced regenerated cellulose nanocomposite fibers prepared by lyocell process

et al. 2015

View full text Add to dashboard Cite

Nanocomposites of regenerated cellulose containing different amounts of graphene nanoplatelets (GNPs) (0.5, 1, and 2 wt%) have been prepared by wet spinning using Lyocell process. The thermal stability, mechanical, and electrical properties of the nanocomposite fibers were studied. The nanocomposite fibers were characterized by Fourier transform infrared (FTIR), Transmission electron microscopy, X‐ray diffraction, and Scanning electron microscopy (SEM). The tenacity and initial modulus of the nanocomposite fibers improved by 66% and 61%, respectively with the addition of 2 wt% GNPs. The T20 decomposition temperature of regenerated cellulose fibers improved with the addition of GNPs up to 2 wt%. The morphology by SEM revealed exfoliated dispersion of GNPs into the regenerated cellulose matrix which subsequently resulted in good interaction between the nanofillers and the matrix. The addition of exfoliated GNPs generated electrical conductivity. The nanocomposite fibers containing 2 wt% GNPs has a conductivity of 2.3 × 10−4 S/cm. The FTIR spectra showed that the addition of GNPs in regenerated cellulose did not result in any noticeable change in its chemical structure. The resulting nanocomposite may find potential applications in the areas of carbon fiber precursor, conductive fibers, electrical tools, and biodegradable composites. POLYM. COMPOS., 38:E81–E88, 2017. © 2015 Society of Plastics Engineers

show abstract

Lyocell fibers as the precursor of carbon fibers

Cited by 88 publications

References 30 publications

Physical and mechanical properties of polyvinyl alcohol and polypropylene composite materials reinforced with fibril aggregates isolated from regenerated cellulose fibers

Physical and mechanical properties of polyvinyl alcohol and polypropylene composite materials reinforced with fibril aggregates isolated from regenerated cellulose fibers

Analysis of regenerated cellulose fibers with ionic liquids as a solvent as spinning speed is increased

Graphene reinforced regenerated cellulose nanocomposite fibers prepared by lyocell process

Contact Info

Product

Resources

About