Polymer/liquid crystal composite membranes: A new membrane system for crown-mediated ion transport

Seiji Shinkai; Tisato Kajiyama

doi:10.1351/pac198860040575

Polymer/liquid crystal composite membranes: A new membrane system for crown-mediated ion transport

Seiji Shinkai, Tisato Kajiyama

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Composite membranes composed of polymer (polycarbonate, PC)/liquid crystal [N-(4-ethoxybenzylidene)-4' ‘-butylaniline, EBBA]/crown ethers have been prepared. Crown-mediated K⁺ transport through the PC/EBBA/crown membranes was very fast above tkn(crystal-nematic liquid crystal phase transition temperature of EBBA) owing to the high fluidity of EBBA forming a continuous phase in the composite membranes. K⁺ transport was very slow below T_KN where the therm38:150al molecular motion of EBBA is frozen. In particular, K⁺ transport is “completely” suppressed when the crown carriers form microheterogeneous, phase-separated aggregates in the membranes. This is the first example for “complete” thermocontrol of ion transport through the polymer composite membranes.

Original language	English
Pages (from-to)	575-580
Number of pages	6
Journal	Pure and Applied Chemistry
Volume	60
Issue number	4
DOIs	https://doi.org/10.1351/pac198860040575
Publication status	Published - Jan 1 1988
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

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10.1351/pac198860040575

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title = "Polymer/liquid crystal composite membranes: A new membrane system for crown-mediated ion transport",

abstract = "Composite membranes composed of polymer (polycarbonate, PC)/liquid crystal [N-(4-ethoxybenzylidene)-4' {\textquoteleft}-butylaniline, EBBA]/crown ethers have been prepared. Crown-mediated K+ transport through the PC/EBBA/crown membranes was very fast above tkn(crystal-nematic liquid crystal phase transition temperature of EBBA) owing to the high fluidity of EBBA forming a continuous phase in the composite membranes. K+ transport was very slow below TKN where the therm38:150al molecular motion of EBBA is frozen. In particular, K+ transport is “completely” suppressed when the crown carriers form microheterogeneous, phase-separated aggregates in the membranes. This is the first example for “complete” thermocontrol of ion transport through the polymer composite membranes.",

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AU - Shinkai, Seiji

AU - Kajiyama, Tisato

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N2 - Composite membranes composed of polymer (polycarbonate, PC)/liquid crystal [N-(4-ethoxybenzylidene)-4' ‘-butylaniline, EBBA]/crown ethers have been prepared. Crown-mediated K+ transport through the PC/EBBA/crown membranes was very fast above tkn(crystal-nematic liquid crystal phase transition temperature of EBBA) owing to the high fluidity of EBBA forming a continuous phase in the composite membranes. K+ transport was very slow below TKN where the therm38:150al molecular motion of EBBA is frozen. In particular, K+ transport is “completely” suppressed when the crown carriers form microheterogeneous, phase-separated aggregates in the membranes. This is the first example for “complete” thermocontrol of ion transport through the polymer composite membranes.

AB - Composite membranes composed of polymer (polycarbonate, PC)/liquid crystal [N-(4-ethoxybenzylidene)-4' ‘-butylaniline, EBBA]/crown ethers have been prepared. Crown-mediated K+ transport through the PC/EBBA/crown membranes was very fast above tkn(crystal-nematic liquid crystal phase transition temperature of EBBA) owing to the high fluidity of EBBA forming a continuous phase in the composite membranes. K+ transport was very slow below TKN where the therm38:150al molecular motion of EBBA is frozen. In particular, K+ transport is “completely” suppressed when the crown carriers form microheterogeneous, phase-separated aggregates in the membranes. This is the first example for “complete” thermocontrol of ion transport through the polymer composite membranes.

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Polymer/liquid crystal composite membranes: A new membrane system for crown-mediated ion transport

Abstract

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