Characterization of Cellulase-Treated Fibers and Resulting Cellulose Nanocrystals Generated through Acid Hydrolysis

Beyene, Dawit; Chae, Michael; Dai, Jindong; Danumah, Christophe; Tosto, Frank; Demesa, Abayneh Getachew; Bressler, David C.

doi:10.3390/ma11081272

Cited by 61 publications

(46 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured particle size, often called a hydrodynamic diameter, which indicates the way that the CNF particle diffuses within a fluid. It is essential to understand that PSA is based on the Stokes–Einstein equation, where the measurements refer to spherical particles and the orientation of the CNFs in suspension profoundly influences the particle size values obtained [ 44 ]. The size distribution of CNF-PP 1.0M , CNF-PP 3.8M and CNF-PP 5.6M, as measured by particle size analysis, is shown in Figure 2 a,b.…”

Section: Resultsmentioning

confidence: 99%

Structural, Morphological and Thermal Properties of Cellulose Nanofibers from Napier fiber (Pennisetum purpureum)

et al. 2020

View full text Add to dashboard Cite

The purpose of the study is to investigate the utilisation of Napier fiber (Pennisetum purpureum) as a source for the fabrication of cellulose nanofibers (CNF). In this study, cellulose nanofibers (CNF) from Napier fiber were isolated via ball-milling assisted by acid hydrolysis. Acid hydrolysis with different molarities (1.0, 3.8 and 5.6 M) was performed efficiently facilitate cellulose fiber size reduction. The resulting CNFs were characterised through Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), particle size analyser (PSA), field-emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and transmission electron microscopy (TEM). The FTIR results demonstrated that there were no obvious changes observed between the spectra of the CNFs with different molarities of acid hydrolysis. With 5.6 M acid hydrolysis, the XRD analysis displayed the highest degree of CNF crystallinity at 70.67%. In a thermal analysis by TGA and DTG, cellulose nanofiber with 5.6 M acid hydrolysis tended to produce cellulose nanofibers with higher thermal stability. As evidenced by the structural morphologies, a fibrous network nanostructure was obtained under TEM and AFM analysis, while a compact structure was observed under FESEM analysis. In conclusion, the isolated CNFs from Napier-derived cellulose are expected to yield potential to be used as a suitable source for nanocomposite production in various applications, including pharmaceutical, food packaging and biomedical fields.

show abstract

Section: Resultsmentioning

confidence: 99%

Structural, Morphological and Thermal Properties of Cellulose Nanofibers from Napier fiber (Pennisetum purpureum)

et al. 2020

View full text Add to dashboard Cite

show abstract

“…A promising case of study could be represented by the comparison of spheres and rods particles. As reported by Bartoli et al ., carbon spheres can be produced by pyrolytic treatment of cellulose nanocrystals (CNCs) while carbon rods can be obtained by the same process using wasted cotton fibers (CFs) . Additionally, these materials are both composed by cellulose and pyrolytic reactivity and biochar residual groups are the same using the same pyrolytic conditions …”

Section: Introductionmentioning

confidence: 99%

Effect of incorporation of microstructured carbonized cellulose on surface and mechanical properties of epoxy composites

Bartoli

Rosso

Giorcelli

et al. 2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

In this study, we reported the use of cellulose derived microstructured biochars for the production of reinforced plastics. Cellulose nanocrystals and wasted cotton fibers were used as cellulose template structures and converted into carbonaceous materials under pyrolytic conditions. Biochars particles were produced with the shape of deformed spheres or rods and dispersed into an epoxy matrix with a loading ranging from 1 wt % to 10 wt %. Biochar-based composites showed remarkably elongation properties of up to 8.2% using 2 wt % of carbonized cellulose nanocrystals and a very low friction coefficient of 0.22 using 10 wt % of carbonized cotton fibers. © 2019Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48896. HIGHLIGHTS:• Carbon spheres and carbon rods were produced through pyrolytic conversion of cellulose nanocrystals and wasted cotton fibers.• Mechanical properties of carbon spheres and carbon rods epoxy composites were studied showing the differences induced by the particle shapes. • An ultimate tensile strength improvement of 57% was reached using 5 wt % of carbonized cellulose nanocrystals.• A maximum elongation improvement of 100% was reached using 2 wt % of carbonized cellulose nanocrystals.• A friction coefficient reduction of 61% was reached using 10 wt % of carbonized cotton fibers.

show abstract

“…Transmission electron microscopy (TEM) micrographs of CNC isolated from: filter paper enzyme-treated for (A) 0 h, (B) 2 h, and (C) 10 h and wood pulp enzyme-treated for (D) 0 h, (E) 2 h, and (F) 10 h. Reprinted fromBeyene et al (2018) as distributed by creative common license CC BY license, MDPI publisher.…”

mentioning

confidence: 99%

Nanocellulose: From Fundamentals to Advanced Applications

et al. 2020

View full text Add to dashboard Cite

Over the past few years, nanocellulose (NC), cellulose in the form of nanostructures, has been proved to be one of the most prominent green materials of modern times. NC materials have gained growing interests owing to their attractive and excellent characteristics such as abundance, high aspect ratio, better mechanical properties, renewability, and biocompatibility. The abundant hydroxyl functional groups allow a wide range of functionalizations via chemical reactions, leading to developing various materials with tunable features. In this review, recent advances in the preparation, modification, and emerging application of nanocellulose, especially cellulose nanocrystals (CNCs), are described and discussed based on the analysis of the latest investigations (particularly for the reports of the past 3 years). We start with a concise background of cellulose, its structural organization as well as the nomenclature of cellulose nanomaterials for beginners in this field. Then, different experimental procedures for the production of nanocelluloses, their properties, and functionalization approaches were elaborated. Furthermore, a number of recent and emerging uses of nanocellulose in nanocomposites, Pickering emulsifiers, wood adhesives, wastewater treatment, as well as in new evolving biomedical applications are presented. Finally, the challenges and opportunities of NC-based emerging materials are discussed.

show abstract

Characterization of Cellulase-Treated Fibers and Resulting Cellulose Nanocrystals Generated through Acid Hydrolysis

Cited by 61 publications

References 53 publications

Structural, Morphological and Thermal Properties of Cellulose Nanofibers from Napier fiber (Pennisetum purpureum)

Structural, Morphological and Thermal Properties of Cellulose Nanofibers from Napier fiber (Pennisetum purpureum)

Effect of incorporation of microstructured carbonized cellulose on surface and mechanical properties of epoxy composites

Nanocellulose: From Fundamentals to Advanced Applications

Contact Info

Product

Resources

About