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Hult, Eva-Lena; Iversen, Tommy; Sugiyama, Junji

doi:10.1023/a:1024080700873

Cited by 202 publications

(75 citation statements)

References 24 publications

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“…This diffractogram was quite altered from the previous report [21] which gave cellulose diffractogram at 2 = 15.5˚ (peak 1), 16.5˚ (peak 2), and 22.6˚ (peak 3). The 2s were correspond to d values of 5.72, 5.37, and 3.93 angstrom, respectively, and these diffraction peaks are typical of cellulose I.…”

Section: Crystal Morphologycontrasting

confidence: 65%

Cellulose Microfibril from Banana Peels as a Nanoreinforcing Fillers for Zein Films

Phiriyawirut¹,

Maniaw²

2012

OJPChem

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Cellulose microfibril (CMF) was the extraction with acid mixture from peel of Musa sapientum Linn type of banana (Kluai Nam Wa). The fibrous-shape of CMF interconnected weblike structure with the average diameter 26 nm were observed by TEM. In order to prepare zein/CMF nanocomposite films, 16 wt% zein solution was prepared by dissolved in 80% ethanol aqueous solution which contain glycerol 20% w/w. The suspension of CMF and zein solution was mixed with 0% -5% weight fractions of solid CMF in zein matrix. The morphology of the zein films is more roughness by increased amount of cellulose microfibrils. It was found that as CMF content increase from 0 to 5 wt% results in increasing tensile strength and Young's modulus of zein nanocomposite films. The highest strength obtains at 4 wt% CMF.

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Section: Crystal Morphologycontrasting

confidence: 65%

Cellulose Microfibril from Banana Peels as a Nanoreinforcing Fillers for Zein Films

Phiriyawirut¹,

Maniaw²

2012

OJPChem

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“…Hult et al 9 investigated the hierarchic organization of cellulose microfibrils in kraft and sulfite pulp fibers and showed that the kraft fibers exhibit higher ordered cellulose regions and more aggregated fibrils in contrast to the sulfite fibers. This may contribute to higher crystallinity in kraft fibers.…”

Section: Introductionmentioning

confidence: 99%

“…However, pulping conditions as cooking temperature may influence on cellulose properties. The increase in cooking temperature during pulping process can promote more chain scission reactions increasing the amorphous character of the cellulose, which reduce the total amount of cellulose crystalline regions 9,23 . Cellulose crystallinity is one of the most important crystalline structure parameters in cellulose fibers 10 .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, cellulose crystallinity and hydrogen bond between cellulose chains play an important role in the mechanical and thermal properties of composite materials reinforced with cellulose fibers 1,13 . Several techniques as X-ray diffraction and FTIR spectroscopy were used to evaluate the wood and cellulose crystallinity 5,7,8,9,10,12 . However, FTIR spectroscopy has been used as a simple technique for obtaining rapid information about the structure of cellulose and chemical changes taking place in cellulose due to various treatments 10,21,22,[25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

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Materials produced from plant biomass: part II: evaluation of crystallinity and degradation kinetics of cellulose

et al. 2012

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In this study Eucalyptus grandis (CEG) and Pinus taeda (CPT) cellulose fibers obtained from kraft and sulfite pulping process, respectively, were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TGA). The degradation kinetic parameters were determined by TGA using Coats and Redfern method. FTIR results showed that CPT presented a more ordered structure with higher crystallinity than CEG. Thermogravimetric results showed that CPT had a higher thermal stability than CEG. The kinetic results revel that for CEG the degradation mechanism occurs mainly by random nucleation, although phase boundary controlled reactions also occurs while for CPT the degradation process is more related with phase boundary controlled reactions. Results demonstrated that differences between thermal stability and degradation mechanisms might be associated with differences in the cellulose crystalline structure probably caused by different pulping processes used for obtaining the cellulose fibers.

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“…7) exhibit typical diffraction peaks for cellulose: such values of 2θ are recognized as the crystallographic planes (Hult et al 2003;Park et al 2010;Jarrett 2011). In the case of BrownMCC, high content of lignin (10.3%) did not changed the form of diffraction pattern.…”

Section: Molecular Level Investigationsmentioning

confidence: 99%

Comparison of Conventional and Lignin-Rich Microcrystalline Cellulose

Vanhatalo¹,

Maximova²,

Perander³

et al. 2016

BioResources

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a Three microcrystalline cellulose (MCC) samples were manufactured from bleached and unbleached softwood kraft pulp, and their properties were compared to those of the commercial MCC, Avicel PH-101. One of the produced samples retained a large portion of lignin (10.3%), while the two others retained only some. The physical, chemical, thermogravimetric, and molecular properties were analyzed. The presence of lignin caused a substantial effect on the thermogravimetric and chemical properties of the MCC, as well as on its surface characteristics. The lignin-containing sample degraded at lower temperatures, and its UV Raman spectra had a high intensity aromatic band (1600 cm -1 ) arising from the lignin. X-ray photoelectron spectroscopy confirmed a high surface lignin coverage (40%) in this specimen only. Particle size and BET surface area measurement results varied in some limits between MCCs, while the cellulose crystallinity index showed almost equal values between 0.82 and 0.84. This work introduces a new wood-based product, the lignincontaining MCC, comparable in properties to the wide-marketed Avicel.

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Untitled

Cited by 202 publications

References 24 publications

Cellulose Microfibril from Banana Peels as a Nanoreinforcing Fillers for Zein Films

Cellulose Microfibril from Banana Peels as a Nanoreinforcing Fillers for Zein Films

Materials produced from plant biomass: part II: evaluation of crystallinity and degradation kinetics of cellulose

Comparison of Conventional and Lignin-Rich Microcrystalline Cellulose

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