Tohoku University · Engineering
Professor Kimiyoshi Naito's research lab specializes in advanced materials science, with a primary focus on high-performance fibers, carbon nanomaterials, and magnetic nanostructures. The lab investigates the mechanical properties, fracture behavior, and statistical strength distributions of ultrahigh-strength carbon fibers, carbon nanotubes, and polymer-based high-performance fibers, employing techniques such as tensile testing, electron microscopy, and statistical analysis. A key research direction involves enhancing material performance through nanostructuring, such as growing CNTs on carbon fibers or creating self-assembled magnetic dot arrays for next-generation data storage. The lab also explores polymer blends and composite materials, emphasizing compatibility, mechanical reliability, and durability under static and fatigue loading conditions.
Figures are computed from collected data and may differ slightly.
Circumferential magnetic patterned media were prepared on a 2.5-inch-diameter glass plate and on a 3-in-diameter silicon plate. A Ni master disk possessing spiral patterns with 60-250-nm-width lands and a 400-nm-width groove was pressed into a resist film on a CoPt or CoCrPt film to transfer the spiral patterns. A diblock copolymer solution was cast into the obtained grooves and then annealed to prepare self-assembling dot structures aligned along the grooves. According to the dot patterns, the
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibility in Blends of Poly(methyl methacrylate) and Poly(styrene-co-acrylonitrile). 1. Physical PropertiesK. Naito, G. E. Johnson, D. L. Allara, and T. K. KweiCite this: Macromolecules 1978, 11, 6, 1260–1265Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published inissue 1 November 1978https://pubs.acs.org/doi/10.1021/ma60066a037https://doi.org/10.1021/ma60066a037research-articleACS PublicationsRequest reuse
The flexural properties of ultrahigh tensile strength polyacrylonitrile‐based (T1000GB), ultrahigh modulus pitch‐based (K13D), and high ductility pitch‐based (XN‐05) carbon fibers have been investigated using a three‐point bending test at various span lengths ranging from 200 to 1500 μm. The flexural modulus and flexural strength of these carbon fibers were measured at room temperature. The fracture surfaces under bending were examined using a high‐resolution scanning electron microscope to iden
The tensile properties and fracture behavior of carbon nanotubes (CNTs) grown on ultrahigh tensile strength polyacrylonitrile (PAN)-based (T1000GB) and ultrahigh modulus pitch-based (K13D) carbon fibers have been investigated. The CNTs were grown on the carbon fiber surface using chemical vapor deposition. The statistical scattering of the tensile strength was also evaluated. The results clearly show that grafting of CNTs improves the mechanical properties and the Weibull modulus of ultrahigh te
Abstract The tensile properties and fracture behavior of poly‐( para ‐phenylene‐2,6‐benzobisoxazole), poly‐( para ‐phenylene terephthalamide), co ‐poly‐( para ‐phenylene‐3,4′‐oxydiphenylene terephthalamide), polyarylate, polyethylene, and poly(lactic acid) high‐performance polymeric fibers have been investigated. The Weibull statistical distributions of the tensile strength were also characterized. The results clearly show that for various types of high‐performance polymer fibers, the Weibull mo
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