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30 results found
Two new methods based on FT-Raman spectroscopy, one simple, based on band intensity ratio, and the other, using a partial least-squares (PLS) regression model, are proposed to determine cellulose I crystallinity. In the simple method, crystallinity in semicrystalline cellulose I samples was…
Author(s): Umesh P. Agarwal, Richard S. Reiner, Sally A. Ralph
Keywords: Correlation, statistics, analytic chemistry, cellulose, chemistry, wood chemistry, X-rays, Raman spectroscopy, Fourier transform spectroscopy, spectrum analysis, regression analysis, standard error, partial least squares, band intensity ratio, cellulose I, crystallinity
Source: Proceedings of the 15th International Symposium on Wood, Fiber, and Pulping Chemistry, Oslo, Norway (June 15-18, 2009). Oslo, Norway : Congress-Conference AS, 2009: paper no. P-053_ISWFPC_Cellulose_Crystallinity.
Year: 2009
Two new methods based on FT–Raman spectroscopy, one simple, based on band intensity ratio, and the other using a partial least squares (PLS) regression model, are proposed to determine cellulose I crystallinity. In the simple method, crystallinity in cellulose I samples was determined based on…
Author(s): Umesh P. Agarwal, Richard S. Reiner, Sally A. Ralph
Keywords: Cellulose, crystallinity, Raman spectroscopy, FT–Raman, univariate analysis, multivariate analysis, PLS, X-ray, analytic chemistry, chemistry, wood chemistry, Fourier transform spectroscopy, spectrum analysis, correlation, cellulose I, partial least squares, band intensity ratio, standard error
Source: Cellulose. Vol. 17 (2010): p. 721-733.
Year: 2010
Solid and microcellular components made of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/ poly (butylenes adipate-co-terephthalate) (PBAT) blend (weight ration of PHBV:PBAT = 30:70), recycled wood fiber (RWF), and nanoclay (NC) were prepared via a conventional and microcellular-injection…
Author(s): Alireza Javadi, Yottha Srithep, Jungjoo Lee, Srikanth Pilla, Craig Clemons, Shaoqin Gong, Lih-Sheng Turng
Keywords: Clay, composite materials, mechanical properties, injection molding of plastics, thermoplastic composites, plastics, extrusion, wood-plastic composites, recycled products, recycling, thermal properties, modulus of elasticity, elasticity, silane, nanoclay, strength, PBAT, PHBV, wood fibers, wood-plastic materials, tensile strength, crystallinity, thermal degradation, biocomposites
Source: Composites, Part A, Applied science and manufacturing. Vol. 41, no. 8 (Aug. 2010): p. 982-990.
Year: 2010
Raman spectroscopy with its various special techniques and methods has been applied to study plant biomass for about 30 years. Such investigations have been performed at both macro- and micro-levels. However, with the availability of the Near Infrared (NIR) (1064 nm) Fourier Transform (FT)-Raman…
Author(s): Umesh P. Agarwal
Keywords: Raman spectroscopy, near-IR, cell walls, plants, biomass, cellulose, lignin, crystallinity
Source: Frontiers in Plant Science, Plant Biophysics and Modeling, September 2014, Volume 5, Article 490, 2014; 12 p.
Year: 2014
In recent years, a new type of nanocomposite – cellulose based hybrid nanocomposites, which adopts cellulose nanofibers as matrices, has been intensively developed. Among these materials, hybrid nanocomposites consisting of cellulosic fibers and magnetic nanoparticles have recently attracted much…
Author(s): Tao Wang, Zhiyong Cai, Lei Liu, Ilker S. Bayer, Abhijit Biswas
Keywords: Nanostructured materials, nanotechnology, technological innovations, microstructure, cellulose chemistry, composite materials, nanocomposites, nanocrystals, crystallization, chemical composition, nanoparticles, biotechnology, nanofibers, magnetite, biocomposites, nanocellulose, crystalline cellulose, crystallinity, cellulosic fibers, magnetic nanoparticles
Source: Vacuum technology & coating. Vol. 11, no. 9 (Sept. 2010): p. 2-5.
Year: 2010
Hydrolysis experiments with commercial cellulases have been performed to understand the effects of cell wall crystallinity and lignin on the process. In the focus of the paper are loblolly pine wood samples, which were systematically delignified and partly ball-milled, and, for comparison, Whatman…
Author(s): Umesh P. Agarwal, J.Y. Zhu, Sally A. Ralph
Keywords: ball milling, cellulase, cellulose, crystallinity, enzymatic hydrolysis, hydrolysis, lignin, loblolly pine, wood
Source: Holzforschung 2013; Volume 67, Number 4: 2013; pp. 371–377.
Year: 2013
This critical review provides a processing-structure-property perspective on recent advances in cellulose nanoparticles and composites produced from them. It summarizes cellulose nanoparticles in terms of particle morphology, crystal structure, and properties. Also described are the self-assembly…
Author(s): Robert J. Moon, Ashlie Martini, John Nairn, John Simonsen, Jeff Youngblood
Keywords: Nanostructured materials, nanotechnology, technological innovations, microstructure, cellulose, chemistry, composite materials, nanocomposites, nanocrystals, crystallization, chemical composition, biocomposites, nanoparticles, mechanical properties, suspensions, elasticity, surface chemistry, nanocellulose, crystalline cellulose, nanocomposites, crystallinity, review article, bacterial cellulose, synthesis paper
Source: Chemical Society reviews. Vol. 40, no. 7 (2011): p. 3941-3994.
Year: 2011
This study demonstrates the feasibility of integrating the production of nano-fibrillated cellulose (NFC), a potentially highly valuable biomaterial, with sugar/biofuel (ethanol) from wood fibers. Commercial cellulase enzymes were used to fractionate the less recalcitrant amorphous cellulose from a…
Author(s): Junyong Zhu, Ronald Sabo, Xiaolin Luo
Keywords: Enzymes, industrial applications, fungal enzymes, ethanol, fuelwood, biomass energy, biomass utilization, biotechnology, cellulose, hydrolysis, fermentation, sugars, Eucalyptus, wood-decaying fungi, sulfate pulping process, cellulase, yeast fungi, nanofibers, nano-fibrillated cellulose, NFC, nanocellulose, fractionation, wood fibers, biomass fuel, bioconversion, biorefining, chemical utilization, alcohol, wood extractives, pulp and paper processes, crystallinity, polymers, polymerization, tensile strength, opacity
Source: Green chemistry. Vol. 13, no. 5 (May 2011): p. 1339-1344.
Year: 2011
The synthesis of cadmium sulfide (CdS), zinc sulfide (ZnS), and lead sulfide (PbS) nanoparticle chains on cellulose nanocrystal (CNC) templates can be accomplished by the reaction of the precursor salts. The use of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), was critical for the…
Author(s): Sonal Padalkar, Jeff R. Capadona, Stuart J. Rowan, Christoph Weder, Robert J. Moon, Lia A. Stanciu
Keywords: Nanostructured materials, nanotechnology, microstructure, cellulose, nanocrystals, crystallization, chemical composition, nanoparticles, cadmium sulfide, zinc sulfide, lead sulfide, salts, semiconductors, surface active agents, Tunicata, sea squirts, biosynthesis, biotechnology, nanocellulose, crystalline cellulose, crystallinity, Cetyltrimetylammonium bromide, CTAB, particle sizes
Source: Journal of materials science. Vol. 46, no. 17 (Sept. 2011): p. 5672-5679.
Year: 2011
The development of metrology for nanoparticles is a significant challenge. Cellulose nanocrystals (CNCs) are one group of nanoparticles that have high potential economic value but present substantial challenges to the development of the measurement science. Even the largest trees owe their strength…
Author(s): Michael T. Postek, Andras Vladar, John Dagata, Natalia Farkas, Bin Ming, Ryan Wagner, Arvind Raman, Robert J. Moon, Ronald Sabo, Theodore H. Wegner, James Beecher
Keywords: Cellulose, nanocrystals, measurement, crystallization, nanotechnology, nanostructured materials, biopolymers, biosynthesis, cellulose, chemistry, nanoparticles, cellulose fibers, nanofibers, elasticity, scanning probe microscopy, scanning electron microscopy, measuring instruments, metrology, crystalline cellulose, nanocomposites, crystallinity, helium ion microscopy, cellulose fibers properties, nanometrology, cellulose nanocrystals, CNC, metrology, standards
Source: Measurement science and technology. Vol. 22, no. 2 (Feb. 2011): [10] p.
Year: 2011
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