A5067644038- Advanced Chemical Physics Studies
- Electrospun Nanofibers in Biomedical Applications
- Polymer crystallization and properties
- Advanced Cellulose Research Studies
- Surface and Thin Film Phenomena
- nanoparticles nucleation surface interactions
- Fiber-reinforced polymer composites
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Polymer Nanocomposites and Properties
- biodegradable polymer synthesis and properties
- Additive Manufacturing and 3D Printing Technologies
- Carbon Nanotubes in Composites
- Nanocomposite Films for Food Packaging
- Synthesis and properties of polymers
- Natural Fiber Reinforced Composites
- Textile materials and evaluations
- Metallurgical and Alloy Processes
- Spectroscopy and Quantum Chemical Studies
- Fluorine in Organic Chemistry
- Surface Modification and Superhydrophobicity
- Rare-earth and actinide compounds
- Advanced Materials Characterization Techniques
- Material Properties and Processing
- Polymer Foaming and Composites
Shinshu University
2011-2024
Materials Science & Engineering
2020
Tokyo University of Science
1999-2009
Ōtani University
2006
Eindhoven University of Technology
2003
Yamagata University
2003
Indian Institute of Technology Kharagpur
2003
Gunma University
1994-2002
Hokkaido University
2002
Tokai University
2002
To exploit the maximum potential of cellulose whiskers (CWs), we report here for first time successful fabrication nanocomposites reinforced with highly oriented CWs in a polymer matrix. The were prepared using polyvinyl alcohol (PVA) and colloidal suspension cotton-derived CWs. macroscopically homogeneous PVA-CW suspensions extruded into cold methanol to form gel fibers followed by hot drawing. Compared neat PVA fiber, as-spun fiber containing small amount (5 wt % solid PVA) showed higher...
Carbon fibers were fabricated from electrospun poly(vinyl alcohol) (PVA) nanofibers. Electrospun PVA nanofibers treated with iodine vapor for different periods, subsequently carbonized at temperatures, and the structural changes of analyzed. The iodinated 80 °C 24 h led to a good carbon yield 21% when 1200 °C. influence metal nanoparticle on fabrication fiber its properties was also investigated by addition salt, nickel(II) acetate tetrahydrate [(CH 3 COO) 2 Ni·4H O], spinning solution....
Composite films consisting of metallic Cu nanoparticles dispersed in poly(acrylic acid) (PAA) have been prepared by reduction Cu2+ from the copper salt PAA above 220 °C under a H2 atmosphere. Optical absorption properties and structures also investigated UV/VIS, WAXD, TEM IR. Spherical particles were found to be homogeneously diameters range 10–16 nm. The composite exhibited an optical peak centered at ca. 570 nm, which was attributed surface plasmon resonance nanoparticles. film made heat...
Abstract Nylon‐6/poly(ethylene terephthalate) (PET) ultra‐multi‐island sea–island conjugated melt‐spun fibers are flow‐drawn at a draw ratio of 174 with heating by CO 2 laser irradiation. Continuous PET nanofibers that have diameter 39 nm could be obtained from the fiber further drawing and removal sea component. In addition, drawn has strength 0.54 GPa. This result shows nanofiber having almost equal to conventional can combination conjugate‐melt‐spinning laser‐heated flow‐drawing. magnified image
The interactions between condensed molecules at cryogenic temperatures (15–200 K) have been investigated on the basis of secondary ion mass spectrometry. It is demonstrated that protonated molecular ions, emitted via proton transfer reactions, provide us unique information about reorganization hydrogen-bonded molecules. From CH3OH adsorbed D2O–ice surface, D+(CH3OH) ions are sputtered predominantly in temperature range 100 and 150 K since most bound to D2O layer hydrogen bonds. A rapid...
We have investigated the ferroelectric domain structure formed in a Sr0.61Ba0.39Nb2O6 single crystal by cooling through Curie point. Imaging etched surface using scanning force microscope (SFM) both topographic mode and piezoresponse revealed that multidomain of nanoscale islandlike domains was formed. The could be inverted applying an appropriate voltage conductive SFM tip. Furthermore, periodically inverted-domain artificially fabricated which underwent poling treatment.
Abstract Fibers of PA9‐T, a new semiaromatic polyamide containing long aliphatic chain, were prepared by melt spinning. As‐spun fibers subsequently drawn with CO 2 laser‐heated drawing system at different draw ratios and various velocities. On‐line observations points deciphered two states; namely, flow neck drawing, over the entire range drawing. Drawing stress revealed that is induced slight under low ratio up to 3, relatively high higher ratio. The effect velocity on development structure...
Abstract The initial stage of fiber structure development in the continuous neck‐drawing amorphous poly(ethylene terephthalate) fibers was analyzed by situ wide‐angle X‐ray diffraction, small‐angle scattering, and temperature measurements. time error measurements (<600 μs) obtained synchrotron source laser irradiation heating. A highly ordered fibrillar‐shaped two‐dimensional (smectic‐like) found to be formed less than 1 ms after necking. By analyzing its (001′) (002′) diffractions,...
Abstract In order to utilize the excellent mechanical properties of cellulose whiskers (CWs) along their length, present work was undertaken embed CWs with highly oriented forms in a polymer matrix. Nanocomposite fibers were prepared using poly(vinyl alcohol) (PVA; degree polymerization 1500) as matrix and stable aqueous suspension extracted from tunicates reinforcing phase. Macroscopically homogeneous suspensions PVA–CW gel‐spun methanol coagulating bath. The as‐spun included fiber axis...
ABSTRACT In the present study, we focused on several factors affecting utility of 1‐butyl‐3‐methylimidazolium chloride (BMIMCl) for obtaining higher performance fibers. The dependence spinnability and tensile strength fibers zero‐shear viscosity spinning solutions was investigated based differences in molecular weight cellulose, pulp concentration, pH BMIMCl. We demonstrated an appropriate range 2000–4000 Pa s −1 (100 °C) dopes to obtain good high strength. BMIMCl cellulose clearly impacted...