A5028874166- Advanced Cellulose Research Studies
- Nanocomposite Films for Food Packaging
- Electrospun Nanofibers in Biomedical Applications
- Natural Fiber Reinforced Composites
- Lignin and Wood Chemistry
- Superconducting Materials and Applications
- Advanced ceramic materials synthesis
- Physics of Superconductivity and Magnetism
- Polysaccharides and Plant Cell Walls
- biodegradable polymer synthesis and properties
- Biofuel production and bioconversion
- Dyeing and Modifying Textile Fibers
- Fatigue and fracture mechanics
- Tribology and Wear Analysis
- Polymer Nanocomposites and Properties
- Ecology and Conservation Studies
- Textile materials and evaluations
- Metal and Thin Film Mechanics
- Acoustic Wave Resonator Technologies
- Mechanical stress and fatigue analysis
- Blood properties and coagulation
- Electrophoretic Deposition in Materials Science
- Plant Ecology and Soil Science
- Polymer crystallization and properties
- Urban and spatial planning
Yokogawa Electric (Japan)
2024
National Institute of Advanced Industrial Science and Technology
2013-2020
The University of Tokyo
2009-2013
Kyoto University
2004-2011
Tokyo Polytechnic University
2011
Tottori University
1998
Yamaguchi University
1988
Optically transparent paper of densely packed cellulose nanofibers is prepared without any additives. This material has the same chemical constituents as conventional paper, only difference being fiber width and size interstitial cavities. optically exhibits high Young's modulus, strength, ultralow CTE, foldability.
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTObtaining Cellulose Nanofibers with a Uniform Width of 15 nm from WoodKentaro Abe, Shinichiro Iwamoto, and Hiroyuki YanoView Author Information Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan Cite this: Biomacromolecules 2007, 8, 10, 3276–3278Publication Date (Web):September 5, 2007Publication History Received5 June 2007Revised17 July 2007Published online5 September inissue 1 October...
The elastic modulus of single microfibrils from tunicate (Halocynthia papillosa) cellulose was measured by atomic force microscopy (AFM). Microfibrils with cross-sectional dimensions 8 × 20 nm and several micrometers in length were obtained oxidation 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) as a catalyst subsequent mechanical disintegration water sulfuric acid hydrolysis. nanocellulosic materials deposited on specially designed silicon wafer grooves 227 width, three-point bending...
Hemicelluloses as matrix substances showed an important role in nanofibrillation of wood pulp. Never-dried and once-dried pulps with different amounts hemicelluloses were fibrillated using a grinding treatment. The degree fibrillation was evaluated by scanning electron microscopy observation the light transmittance measurements pulp/acrylic resin composites. With one-pass treatment, pulp higher hemicellulose content into 10−20 nm wide fibers easily never-dried pulps, while lower not uniform...
Cellulose nanofibers were prepared by TEMPO-mediated oxidation of wood pulp and tunicate cellulose. The cellulose nanofiber suspension in water was spun into an acetone coagulation bath. spinning rate varied from 0.1 to 100 m/min align the fibers. fibers had a hollow structure at rates >10 m/min, whereas porous. Wide-angle X-ray diffraction analysis revealed that aligned fiber direction higher rates. Young's modulus 23.6 GPa, tensile strength 321 MPa, elongation break 2.2%. increased with...
Wood cellulose nanofibril films with sodium carboxylate groups prepared from a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized pulp exhibited an extremely low oxygen permeability of 0.0008 mL μm m–2 day–1 kPa–1 at 0% relative humidity (RH). Positron annihilation lifetime spectroscopy (PALS) was used to determine the pore sizes in wood and tunicate TEMPO-oxidized (TOCN-COONa) vacuum (i.e., RH). PALS analysis revealed that size TOCN-COONa remained nearly 0.47 nm film surface interior...
Esterification with maleic anhydride before mechanical treatments enabled wood to fibrillate into thin and uniform thick lignocellulose nanofibers. The esterification did not affect the crystal structure of cellulose, carboxyl groups introduced by facilitated fibrillation wood. Moisture in reaction system caused hydrolysis some lignin hemicellulose, thereby assisting fibrillation. significantly reduced number passes through disk mill required for production nanofibers large specific surface...
The dimensions of nanocelluloses are important factors in controlling their material properties. present study reports a fast and robust method for estimating the widths individual nanocellulose particles based on turbidities water dispersions. Seven types nanocellulose, including short rigid cellulose nanocrystals long flexible nanofibers, prepared via different processes. Their calculated from respective turbidity plots dispersions, theory light scattering by thin particles....
Stem cell culture often requires various animal-derived components such as serum and collagen. This limits its practical use. Therefore, xeno-free (xenogeneic component-free) systems are receiving increased attention. Herein, we propose xeno-free, plant-derived cellulose nanofibers (CNFs) with different surface chemistry: 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized CNFs (TOCNFs) carboxy groups surface-sulfated (S-CNFs) for the proliferation of human mesenchymal stem cells (hMSCs)...
The shapes of the edge-on lamellar crystals equiweight poly(l-lactide) (PLLA)/poly(d-lactide) (PDLA) stereocomplexes with various combinations molecular weights were investigated by using atomic force microscopy. In cases PLLA/PDLA blends equivalent weights, straight-shaped lamellae observed. On other hand, curved able to be seen for nonequivalent weights. It was revealed that direction curvature in polylactide (PLA) is same as PLA having lower weight. addition blending ratio, incidence...
Lignocellulose nanofibers were prepared by the wet disk milling of wood flour. First, an ethylene-butene copolymer was pre-compounded with flour or lignocellulose to prepare master batches. This process involved evaporating water nanofiber suspension during compounding heating at 105 °C. These batches compounded again polypropylene obtain final composites. Since is elastomer, its addition increased impact strength but decreased stiffness. In contrast, flour- and nanofiber-reinforced...
A method to estimate the thermally induced residual strain accumulation under varying temperature in a Bi2223/Ag/Ag alloy composite superconductor was presented, which mechanical property values measured from stress–strain curves of samples with different states, value Bi2223 filaments tape at room by x-ray diffraction and reported coefficients thermal expansion constituents (Bi2223, Ag alloy) relevant range were incorporated. This applied change all high critical current type fabricated...