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932 results on '"Furukawa, Hidemitsu"'

213. 3D Printing of Molds for Soft Lithography

Author

Shah, Shreyas, primary, Shiblee, MD Nahin Islam, additional, Furukawa, Hidemitsu, additional, Kawakami, Masaru, additional, Nagahara, Larry A, additional, Thundat, Thomas, additional, Sekhar, Praveen K., additional, and Khosla, Ajit, additional

Published
2018
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216. 3D printing of foods

Author

Ishigaki, Ryo, primary, Basher, Samiul, primary, Sasaki, Hiroyuki, primary, Saito, Azusa, primary, Makino, Masato, primary, Khosla, Ajit, primary, Kawakami, Masaru, primary, Furukawa, Hidemitsu, primary, and Kodama, Mai, primary

Published
2018
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249. A molecular dynamics simulation study on polymer networks of end-linked flexible or rigid chains.

Author

Hosono, Nobuhiko, Masubuchi, Yuichi, Furukawa, Hidemitsu, and Watanabe, Toshiyuki

Subjects
MOLECULAR dynamics, POLYMER networks, CROSSLINKED polymers, POLYMERS
Abstract

The differences in formation and structural properties of polymer networks consisting of end-linked flexible or rigid chains were studied by molecular dynamics simulation. Networks were formed from monodisperse, linear, short, flexible or rigid chains with functional end groups and a stoichiometric ratio of trifunctional cross-linkers. The rigid chains had a rodlike shape defined by an angle potential, while the flexible chains had no angle potential. In order to understand the influence of chain rigidity, all parameters of precursor chains (length, reactivity, bond potential, nonbonding potential) were the same, with the exception of the angle potential. The system density ρ, corresponding to the concentration of monomer in solvent, was varied from 0.01 to 0.11. Different network structures resulting from the different processes of network formation were observed. Simulations showed that the flexible chains created an inhomogeneous network on a large scale via microgel cluster formation, in agreement with experimental observations, whereas the rigid chains rapidly created a homogeneous network in the entire system volume without first generating microgel clusters, with the additional difference that they gave rise to mutually interpenetrating networks at the local scale. [ABSTRACT FROM AUTHOR]

Published
2007
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250. Hydrogels with cylindrically symmetric structure at macroscopic scale by self-assembly of semi-rigid polyion complex

Author

Zi Liang Wu, Kurokawa, Takayuki, Songmiao Liang, Furukawa, Hidemitsu, and Jian Ping Gong

Subjects
Amides -- Chemical properties, Benzene -- Structure, Benzene -- Chemical properties, Phthalates -- Chemical properties, Polymerization -- Analysis, Chemistry
Abstract

A hydrogel with cylindrically symmetric structure at macroscopic scale is developed by polymerization of a cationic monomer in the presence of a small amount of semi-rigid polyanion poly(2,2E-disulfonyl-4,4' -benzidine terephthalamide) (PBDT) in a cylinder glass tube. The homeotropic alignment on the glass wall is favorable for the semi-rigid polyion complex and the oriented structures have resulted from the monomer diffusion that has induced PBDT orientation perpendicular to the diffusion direction.

Published
2010

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