Takeo Yamaguchi

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlasma-graft filling polymerization: preparation of a new type of pervaporation membrane for organic liquid mixturesTakeo Yamaguchi, Shinichi Nakao, and Shoji KimuraCite this: Macromolecules 1991, 24, 20, 5522–5527Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1 September 1991https://pubs.acs.org/doi/10.1021/ma00020a006https://doi.org/10.1021/ma00020a006research-articleACS PublicationsRequest r

Unique molecular-recognition microcapsules for environmental stimuli-responsive controlled release have been developed. The microcapsules consist of a core–shell porous membrane. The pores contain linear-grafted poly(NIPAM-co-BCAm) chains, which act as the molecular-recognition gates. The Figure shows the mechanism of the opening of the pores to release the molecules inside.

A highly durable pore-filling-type electrolyte membrane for direct methanol fuel cells has been developed from a porous polyimide substrate and a wholly aromatic hydrocarbon (see figure). The membrane succeeds in reducing the methanol crossover to several hundred times lower than that of a commercial Nafion membrane. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c1086_s.pdf or from the author. Please note: The publisher is not

Abstract Both thermoresponsive flat membranes and core‐shell microcapsule membranes, with a porous membrane substrate and grafted poly(N‐isopropylacrylamide) (PNIPAM) gates, were successfully prepared using a plasma‐graft pore‐filling polymerization method. PNIPAM was proven to be grafted homogeneously onto the porous membrane substrates, in the direction of both the membrane thickness and surface. Regardless of the solute molecular size, temperature had an opposite effect on diffusion coefficie

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTDevelopment of a Fast Response Molecular Recognition Ion Gating MembraneTakeo Yamaguchi, Taichi Ito, Taketoshi Sato, Toshio Shinbo, and Shin-ichi NakaoView Author Information Department of Chemical System Engineering The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656, Japan Cite this: J. Am. Chem. Soc. 1999, 121, 16, 4078–4079Publication Date (Web):April 8, 1999Publication History Received4 December 1998Published online8 April 1999Pub

Pore‐filling membranes that are composed of a porous substrate and a filling polymer electrolyte have been developed. These polyelectrolyte membranes demonstrate low permeation with respect to methanol, high proton conductivity, good mechanical strength, chemical stability, and low cost, making them ideal for use in direct methanol fuel cells. The necessary characteristics can also be controlled by changing the substrate and the filling polymer electrolyte.

Anion exchange membranes are of increasing interest due to their applications in many electrochemical devices such as solid-state alkaline fuel cells. However, their practical applications remain limited compared to proton exchange membranes as they have been found to degrade in alkaline media. This degradation is believed to be derived from the instability of the anion exchange group under alkaline conditions. Consequently, much effort has been focused on the development of an anion exchange gr

The success of pure water solid alkaline water electrolysis (SAWE) technology currently depends on the use of polymer electrolytes exhibiting high OH– conductivity and long-term operational stability. To address these issues, the present study investigated SAWE employing anion exchange membranes and ionomers constructed from a fully aromatic and high-molecular-weight poly(fluorene-alt-tetrafluorophenylene) modified with trimethylammonium. High performances were achieved when the membrane–electro

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransport Properties of Carbon Dioxide through Amine Functionalized Carrier MembranesTakeo Yamaguchi, Lars M. Boetje, Carl A. Koval, Richard D. Noble, and Christopher N. BowmanCite this: Ind. Eng. Chem. Res. 1995, 34, 11, 4071–4077Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/doi/10.1021/ie00038a049https://doi.org/10.1021/ie00038a049research-articleACS Public

We observed fast proton conduction in a material consisting of packed acids, the “packed-acid mechanism” resulting from acid–acid interactions.