Characteristics and Properties of Cellulose Nanofibers Prepared by TEMPO Oxidation of Corn Husk

Du, Chao; Li, Hailong; Li, Bingyun; Liu, Mengru; Zhan, Hui

doi:10.15376/biores.11.2.5276-5284

Cited by 48 publications

(27 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peaks from 1371 and 660 cm -1 reveal that the samples exhibited almost identical FTIR spectra, comparing with the CNFFs untreated samples [54][55][56][57] (Figures 2a-2d). Additionally for making more explicit the difference between the samples and regenerated CNF (Figure 2e) the regenerated sample exhibits one peak at 1045cm -1 due to pyranose ring ether stretching vibration without the two additional small peaks around this peak, which are present in the case of cellulose type I 54,57 . Table Sb1 (see the supporting information).…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 80%

“…The noisy signals between 2300-1900 cm -1 are an artifact of the equipment and were not assigned to any chemical group in the samples. It is possible to see a peak around 1640 cm -1 related to (O-H) bending vibration of the absorbed water 54 . Similar water peaks appeared for all samples, although they were dried in a vacuum oven (200 mbar, 60 o C)…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

See 1 more Smart Citation

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

et al. 2018

View full text Add to dashboard Cite

Cellulose nanofiber films (CNFF), were treated via a welding process using ionic liquids (ILs). Acid-base conjugated ILs derived from 1,5-diazabicyclo[4.3.0]non-5-ene [DBN] and 1-ethyl-3-methylimidazolium acetate ([emim][OAc]) were utilized. The removal efficiency of ILs from welded CNFF was assessed using liquid-state nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared spectroscopy (FTIR). The mechanical and physical properties of CNFF indicated surface plasticization of CNFF, which improved transparency. Upon 2 treatment, the average CNFF toughness increased by 27 % and the films reached a Young modulus of ~5.8GPa. These first attempts for IL 'welding' show promise to tune bio-based films surfaces, expanding the scope of properties for the production of new bio-based materials in a green chemistry context. The results of this work are highly relevant to the fabrication of CNFFs using ionic liquids and related solvents. nanocomposites, transparent films, layer-by-layer films, paper products, cosmetics, barrier/separation membranes, transparent-flexible electronics, batteries, supercapacitors, catalytic supports, continuous fibers and textiles, food coatings, healthcare, antimicrobial films, biomedical and tissue engineering scaffolds, pH-responsive CNMs, drug delivery, among others 2. The sustainable preparation of cellulose-based nanomaterials is techno-economically challenging since this requires a low energy consumption process without the use, or production of, hazardous chemicals. The benefits are the production of high mechanical performance fibers and films, which 3 have potential applications as textiles, support for particles, and as composite materials for catalytic and electrochemical applications 3. Nanocellulose can form self-standing, thermallystable films and "nano-papers", thus this material has been strongly advocated as potential replacement for traditional packaging materials, primarily based on glass, aluminum, and fossilderived synthetic plastics 4-16 , but in many cases, such applications require an improvement of their physical and mechanical properties, in order to enhance their use 13,17. At this respect, the novel concept of welding has been introduced by Haverlhals 18-21. In this process, the surface of adjacent natural fibers (cotton, silk, and hemp) is plasticized and merged to create a congealed network using ILs such as 1-ethyl-3-methylimidazolium acetate ([emim][OAc]), a well-known cellulose-dissolving ionic liquid (IL). The welding process is intended mainly for cellulosic and protein-based fibers with the purpose to improve mechanical properties, synthesis of composites and functionalization of materials 18,22. The welding procedure has been used for modifying mainly cellulose macrofibers (not hydrolyzed neither treated fibers) to produce electrodes, catalysts, materials with special magnetic and electric features 23,24 , and synthesis of composites with improved mechanical properties 25. The same concept, using N-methylmorpholine-N-oxide (NMMO), was use...

show abstract

Section: X-ray Diffraction (Xrd)mentioning

confidence: 80%

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Cellulose nanofibers (CNF) which possess properties such as high aspect ratio (L/d), large specific surface area, biodegradability, low coefficient of thermal expansion [ 1 ], great mechanical properties [ 2 ], and high gas barrier properties [ 3 ] are nano-sized fibers less than 100 nm wide produced from cellulose [ 4 ]. Due to their unique properties, CNF has been utilized in many areas such as tissue engineering [ 5 ], hydrogel contact lenses [ 6 ], filtration [ 7 ], electronic devices [ 8 , 9 , 10 , 11 ], carbon nanofiber production [ 12 ], drug delivery [ 13 ], wound healing [ 14 ], and translucent conducting films [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Nanofibers Prepared via Pretreatment Based on Oxone® Oxidation

et al. 2017

View full text Add to dashboard Cite

Softwood sulfite bleached cellulose pulp was oxidized with Oxone® and cellulose nanofibers (CNF) were produced after mechanical treatment with a high-shear homogenizer. UV-vis transmittance of dispersions of oxidized cellulose with different degrees of mechanical treatment was recorded. Scanning electron microscopy (SEM) micrographs and atomic force microscopy (AFM) images of samples prepared from the translucent dispersions showed individualized cellulose nanofibers with a width of about 10 nm and lengths of a few hundred nm. All results demonstrated that more translucent CNF dispersions could be obtained after the pretreatment of cellulose pulp by Oxone® oxidation compared with the samples produced without pretreatment. The intrinsic viscosity of the cellulose decreased after oxidation and was further reduced after mechanical treatment. Almost translucent cellulose films were prepared from the dispersions of individualized cellulose nanofibers. The procedure described herein constitutes a green, novel, and efficient route to access CNF.

show abstract

“…The extraction of NFC from corn husks improves their economic value. Different methods have been used to extract NFC from corn husk (Mendes et al 2015;Du et al 2016;Xiao et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, TEMPO oxidation method is one of the most widely used approaches for NFC extraction. Dimethyl sulfoxide (DMSO) treatment is a pretreatment process before TEMPO oxidation in some research (Cao et al 2012;Miao et al 2016), while DMSO pretreatment has been omitted in other research (Yu et al 2014;Du et al 2016). The effect of DMSO treatment on the morphology and properties of NFC has not been fully investigated.…”

Section: Introductionmentioning

confidence: 99%

Impact of Dimethyl Sulfoxide Treatment on Morphology and Characteristics of Nanofibrillated Cellulose Isolated from Corn Husks

Wang¹,

Liu²,

Zhao³

et al. 2016

BioResources

View full text Add to dashboard Cite

This work investigated the impact of dimethyl sulfoxide (DMSO) treatment in the isolation of nanofibrillated cellulose (NFC) from corn husk by the 2,2,6,6,-tetramethylpilperidine-1-oxyl (TEMPO) oxidation method. NFC-A and NFC-B were prepared without and with DMSO treatment before TEMPO oxidation. The extracted NFC were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), zeta potential analyzer, Xray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that the dimension of both NFC-A and NFC-B were in nanoscale. The crystalline type of NFC was cellulose I, and the crystallinity of NFC was obviously increased. The thermal stability of NFC was reduced slightly. Compared with NFC-A, NFC-B had a narrower distribution range, higher crystallinity, and better thermal stability. This result demonstrated that DMSO treatment did not change the chemical structure of NFC, but it affected their dimension and distribution and improved their dispersion stability, crystallinity, and thermal stability.

show abstract

Characteristics and Properties of Cellulose Nanofibers Prepared by TEMPO Oxidation of Corn Husk

Cited by 48 publications

References 22 publications

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

Solvent Welding and Imprinting Cellulose Nanofiber Films Using Ionic Liquids

Cellulose Nanofibers Prepared via Pretreatment Based on Oxone® Oxidation

Impact of Dimethyl Sulfoxide Treatment on Morphology and Characteristics of Nanofibrillated Cellulose Isolated from Corn Husks

Contact Info

Product

Resources

About