Results 181 to 190 of about 7,589 (223)
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Localization of Crystalline Allomorphs in Cellulose Microfibril
Biomacromolecules, 2009We report an FTIR spectroscopic technique combined with intracrystalline deuteration and rehydrogenation of cellulose samples to investigate the localization of I(alpha) and I(beta) domains within a cellulose microfibril obtained from I(alpha)-rich algae.
Yoshiki, Horikawa, Junji, Sugiyama
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Extensional viscosity of microfibrillated cellulose suspensions
Carbohydrate Polymers, 2014The extensional properties of micro fibrillated cellulose (MFC)-suspensions at different fibril concentrations and with different amounts of added sodium chloride were evaluated. The MFC-suspensions were obtained by diluting a stock solution consisting of 0.95 wt.% cellulose with either deionized water or sodium chloride solution, giving a series of ...
Tobias, Moberg +3 more
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Fractional study of the microfibrillated cellulose
TAPPI Journal, 2014The extremely high aspect ratios of minuscule lignocellulosic particles make analysis and characterization problematic. New methods to quantify the size, shape, and structure of cellulose microparticles are needed. The main objective of this research has been to study the potential of a novel fractional analysis method for microparticles.
Laitinen Ossi, Niinimäki Jouko
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Polymer composites with cellulose microfibrils
Polymer Engineering & Science, 2007Abstract Polymer composites with cellulose microfibrils are materials with unique properties compared to existing materials: high strength, formability, and geometrical complexity at very small scale, low density, and abrasivity, biomedical compatibility, and possibility of recycling.
Denis Mihaela Panaitescu +5 more
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Carbohydrate Polymers, 2020
Waste biomass of two major milk weeds was separately given combination of chemical-mechanical treatments in order to expose natural cellulosic micro and nano-fibrillated structures (MFCs and NFCs). Compositional and FTIR analysis were initially used to confirm the removal of impurities.
Mandeep Singh +2 more
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Waste biomass of two major milk weeds was separately given combination of chemical-mechanical treatments in order to expose natural cellulosic micro and nano-fibrillated structures (MFCs and NFCs). Compositional and FTIR analysis were initially used to confirm the removal of impurities.
Mandeep Singh +2 more
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A native cellulose microfibril model
Cellulose, 1998To aid in the understanding of cellulose ultrastructure, computer modelling has been employed to create a model of monoclinic (Iβ) native cellulose. This was achieved by building a chain of cellulose, which was used in a two chain unit cell. An energy minimized microfibril model was created from several of these unit cells.
MARK S. BAIRD +2 more
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The Cellulose Microfibril as an Imperfect Array of Elementary Fibrils
Macromolecules, 1975Cellulose microfibrils are viewed as imperfect array of elementary fibrils. We have investigated the possible defects in Valonia cellulose microfibrils, which are such that the microfibrils can be broken into elementary fibrils by deformation, but are not sufficient to allow for a small angle maximum corresponding to the elementary fibril dimension ...
J, Blackwell, F J, Kolpak
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Process for the production of microfibrillated cellulose and produced microfibrillated cellulose
2010A process for producing microfibrillated cellulose comprises providing a slurry comprising cellulosic fibers, treating the slurry with an enzyme, mechanically treating the slurry so that the fibers are disintegrated wherein the mechanical treatment and the treatment with the enzyme is performed simultaneously in a single treatment step.
Heiskanen, Isto +4 more
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THE FORMATION OF CELLULOSE MICROFIBRILS IN SUSPENSIONS OF ACETOBACTER XYLINUM
Canadian Journal of Microbiology, 1960Formation of cellulose microfibrils from precursors elaborated by Acetobacter xylinum takes place remote from the cell surface and without an extensive, amorphous, intermediate high polymer. The microfibrils increase in mass by growth only at one or both tips. The rate of microfibrillar growth per bacterial cell at 25 °C is constant at 0.1 μ per minute
J R, COLVIN, M, BEER
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Journal of Applied Polymer Science, 2010
AbstractTwo types of microfibrillated cellulose (MFC) were prepared using either a sulfite pulp containing a high amount of hemicellulose (MFC 1) or a carboxymethylated dissolving pulp (MFC 2). MFC gels were then combined with amylopectin solutions to produce solvent‐cast MFC‐reinforced amylopectin films.
David Plackett +6 more
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AbstractTwo types of microfibrillated cellulose (MFC) were prepared using either a sulfite pulp containing a high amount of hemicellulose (MFC 1) or a carboxymethylated dissolving pulp (MFC 2). MFC gels were then combined with amylopectin solutions to produce solvent‐cast MFC‐reinforced amylopectin films.
David Plackett +6 more
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