Zobrazeno 1 - 10
of 177
pro vyhledávání: '"Kiyotaka Shigehara"'
Publikováno v:
Polymer International. 67:495-499
Autor:
Kiyotaka Shigehara, Yoshihiro Katayama, Masaya Nakamura, Masami Bito, Yuichiro Otsuka, Kazuhiro Shikinaka, Eiji Masai
Publikováno v:
Waste and Biomass Valorization. 10:1261-1265
The complexation behavior between 2-pyrone-4,6-dicarboxylic acid (PDC) and alkali metal ions was systematically estimated. The PDC complexes of alkali metal ions exhibit unique crystal structures due to the diverse coordination numbers of the metal i
Autor:
Ronald R. Navarro, Ryo Tanigawa, Yuichiro Otsuka, Masaya Nakamura, Kazuhiro Shikinaka, Kiyotaka Shigehara, Masanobu Nojiri, Tomoko Shimokawa
Publikováno v:
Green Chemistry. 18:5962-5966
We report a simple yet effective method for processing lignocellulosic biomass by combined wet-type ultrafine bead milling and enzymatic saccharification at pH 5.0 and 50 °C. This generates nanoscale particles that allow close to 70% saccharificatio
Publikováno v:
RSC Advances. 6:52950-52956
In this paper, we discuss the molecular assembly kinetics of stimuli-responsive hydrogels prepared from imogolite, which is a rigid rod-like colloidal inorganic nanotube, and dicarboxylic acids. Here, the “stepwise” agglomeration of imogolite in
Autor:
Kiyotaka Shigehara, Kazuhiro Shikinaka
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 482:87-91
Ordered assembly of imogolite clay nanotubes was achieved by the spatiotemporal regulation of imogolite complex formation using an organic polyelectrolyte. In a confined reaction space, imogolites formed assemblies with anisotropic birefringence and
Publikováno v:
Polymer. 68:279-283
In this paper, we created nanohybrids consisted of imogolite nanotube and various aliphatic polyesters through a hydrophobization of imogolite. The hydrophobization of imogolite via covalent bonding between aluminol group on imogolite and aldehyde gr
Autor:
Kiyotaka Shigehara, Sungmin Kang, Koichi Sakajiri, Noboru Koshimizu, Kazuhiro Shikinaka, Yosuke Aizawa, Masatoshi Tokita
Publikováno v:
Macromolecules. 48:3653-3661
A series of syndiotatic P5CPn polymethylenes was prepared with 4-(trans-4-pentylcyclohexyl)phenoxy moieties linked to each backbone carbon atom via an alkyloxycarbonyl spacer and with even numbers of alkyl carbons n ranging from 2 to 14, and their th
Autor:
Yoichi Tominaga, Kiyotaka Shigehara, Keisuke Uematsu, Hiroyasu Masunaga, Kazuhiro Shikinaka, Keisuke Kaneda
Publikováno v:
ResearcherID
Autor:
Yoshihiko Murakami, Kiyotaka Shigehara, Kensuke Okoshi, Takashi Nakanishi, Katsuhiko Ariga, Tsuyoshi Michinobu
Publikováno v:
Langmuir. 29:5337-5344
A new class of solvent-free room temperature liquid fullerenes was synthesized by attaching a single substituent of 1,3,5-tris(alkyloxy)benzene unit to C60 or C70 under the Prato conditions. Although the C60 monoadducts were single components after c
Autor:
Yumi Koizumi, Keisuke Kaneda, Hiroyasu Masunaga, Kiyotaka Shigehara, Kazuhiro Shikinaka, Yoshihito Osada
Publikováno v:
Polymer. 54:2489-2492
Robust hydrogels have been developed by addition of imogolite, a perfect rigid polyelectrolyte with a nanotube shape, into polyacrylamide networks. It was revealed that the obtained gel exhibited the distinct isotropic–anisotropic structural transi