Separation Property

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Liqin Ge - One of the best experts on this subject based on the ideXlab platform.

  • Double network self-healing chitosan/dialdehyde starch-polyvinyl alcohol film for gas Separation
    Applied Surface Science, 2019
    Co-Authors: Hongyun Xuan, Liqin Ge
    Abstract:

    Abstract Intrinsic self-healing materials have attracted great attention as its self-healing ability endowed by dynamic linkage. In this work, we report a double-network self-healing film which is built by Schiff base linkage between chitosan (CS) and dialdehyde starch (DS), and hydrogen bond between oxygen-containing groups in the polymer. The double-network film has been characterized by the FTIR spectra, thermal decomposition, swelling Property, and morphology. The self-healing ability of (CS/DS-PVAx)n film with different concentration of PVA has been measured. The results show self-healing efficiency of (CS/DS)15 film, (CS/DS-PVA5)15 film, (CS/DS-PVA7.5)15 film and (CS/DS-PVA10)15 film is ca. 87.5%, ca.74.2%, ca. 88.4%, and ca. 75.5%, respectively. Meanwhile, the gas Separation Property is desirable for self-healing (CS/DS-PVAx)n films due to dense structure and amino groups in the film. According to results, (CS/DS-PVA10)15 film performed a CO2/N2 selectivity of 19.8, with ∼18 fold increment in gas selectivity as compared to (CS/DS)15 film. The combination of gas Separation Property and self-healing Property provides a new way to improve the lifetime of gas Separation films.

  • double network self healing chitosan dialdehyde starch polyvinyl alcohol film for gas Separation
    Applied Surface Science, 2019
    Co-Authors: Hongyun Xuan, Liqin Ge
    Abstract:

    Abstract Intrinsic self-healing materials have attracted great attention as its self-healing ability endowed by dynamic linkage. In this work, we report a double-network self-healing film which is built by Schiff base linkage between chitosan (CS) and dialdehyde starch (DS), and hydrogen bond between oxygen-containing groups in the polymer. The double-network film has been characterized by the FTIR spectra, thermal decomposition, swelling Property, and morphology. The self-healing ability of (CS/DS-PVAx)n film with different concentration of PVA has been measured. The results show self-healing efficiency of (CS/DS)15 film, (CS/DS-PVA5)15 film, (CS/DS-PVA7.5)15 film and (CS/DS-PVA10)15 film is ca. 87.5%, ca.74.2%, ca. 88.4%, and ca. 75.5%, respectively. Meanwhile, the gas Separation Property is desirable for self-healing (CS/DS-PVAx)n films due to dense structure and amino groups in the film. According to results, (CS/DS-PVA10)15 film performed a CO2/N2 selectivity of 19.8, with ∼18 fold increment in gas selectivity as compared to (CS/DS)15 film. The combination of gas Separation Property and self-healing Property provides a new way to improve the lifetime of gas Separation films.

Hongyun Xuan - One of the best experts on this subject based on the ideXlab platform.

  • Double network self-healing chitosan/dialdehyde starch-polyvinyl alcohol film for gas Separation
    Applied Surface Science, 2019
    Co-Authors: Hongyun Xuan, Liqin Ge
    Abstract:

    Abstract Intrinsic self-healing materials have attracted great attention as its self-healing ability endowed by dynamic linkage. In this work, we report a double-network self-healing film which is built by Schiff base linkage between chitosan (CS) and dialdehyde starch (DS), and hydrogen bond between oxygen-containing groups in the polymer. The double-network film has been characterized by the FTIR spectra, thermal decomposition, swelling Property, and morphology. The self-healing ability of (CS/DS-PVAx)n film with different concentration of PVA has been measured. The results show self-healing efficiency of (CS/DS)15 film, (CS/DS-PVA5)15 film, (CS/DS-PVA7.5)15 film and (CS/DS-PVA10)15 film is ca. 87.5%, ca.74.2%, ca. 88.4%, and ca. 75.5%, respectively. Meanwhile, the gas Separation Property is desirable for self-healing (CS/DS-PVAx)n films due to dense structure and amino groups in the film. According to results, (CS/DS-PVA10)15 film performed a CO2/N2 selectivity of 19.8, with ∼18 fold increment in gas selectivity as compared to (CS/DS)15 film. The combination of gas Separation Property and self-healing Property provides a new way to improve the lifetime of gas Separation films.

  • double network self healing chitosan dialdehyde starch polyvinyl alcohol film for gas Separation
    Applied Surface Science, 2019
    Co-Authors: Hongyun Xuan, Liqin Ge
    Abstract:

    Abstract Intrinsic self-healing materials have attracted great attention as its self-healing ability endowed by dynamic linkage. In this work, we report a double-network self-healing film which is built by Schiff base linkage between chitosan (CS) and dialdehyde starch (DS), and hydrogen bond between oxygen-containing groups in the polymer. The double-network film has been characterized by the FTIR spectra, thermal decomposition, swelling Property, and morphology. The self-healing ability of (CS/DS-PVAx)n film with different concentration of PVA has been measured. The results show self-healing efficiency of (CS/DS)15 film, (CS/DS-PVA5)15 film, (CS/DS-PVA7.5)15 film and (CS/DS-PVA10)15 film is ca. 87.5%, ca.74.2%, ca. 88.4%, and ca. 75.5%, respectively. Meanwhile, the gas Separation Property is desirable for self-healing (CS/DS-PVAx)n films due to dense structure and amino groups in the film. According to results, (CS/DS-PVA10)15 film performed a CO2/N2 selectivity of 19.8, with ∼18 fold increment in gas selectivity as compared to (CS/DS)15 film. The combination of gas Separation Property and self-healing Property provides a new way to improve the lifetime of gas Separation films.

Fu-gui Shi - One of the best experts on this subject based on the ideXlab platform.

Shuili Chen - One of the best experts on this subject based on the ideXlab platform.

  • Urysohn Separation Property in topological molecular lattices
    Fuzzy Sets and Systems, 2001
    Co-Authors: Shuili Chen
    Abstract:

    Abstract The theory of topological molecular lattices, which is a generalization of the theories of point set topology, fuzzy topology and L -fuzzy topology, is established by Wang. In this paper, the concepts of some kinds of Urysohn Separation axioms in topological molecular lattices are introduced and systematically discussed. Several important results, such as the U i (i =−1,0,1,2,3,4) , Urysohn regular and Urysohn normal Separation properties are both hereditary and topological invariant, etc., are given.

Toshiharu Sugie - One of the best experts on this subject based on the ideXlab platform.

  • CDC - Stability analysis of quantized feedback systems including optimal dynamic quantizers
    2008 47th IEEE Conference on Decision and Control, 2008
    Co-Authors: Shunichi Azuma, Toshiharu Sugie
    Abstract:

    This paper characterizes the stability of quantized feedback systems which contains optimal dynamic quantizers recently proposed by the authors. First, it is shown that the Separation Property of the quantizer-controller design, which is similar to the well-known Separation Property of the observer-controller design, holds in the quantized feedback systems. Next, based on this Property, a necessary and sufficient condition for the stability is derived, where the stability is characterized by the poles/zeros of a linear feedback system to be quantized. Finally, we present suboptimal dynamic quantizers for which the resulting quantized feedback systems are always stable.

  • stability analysis of quantized feedback systems including optimal dynamic quantizers
    Conference on Decision and Control, 2008
    Co-Authors: Shunichi Azuma, Toshiharu Sugie
    Abstract:

    This paper characterizes the stability of quantized feedback systems which contains optimal dynamic quantizers recently proposed by the authors. First, it is shown that the Separation Property of the quantizer-controller design, which is similar to the well-known Separation Property of the observer-controller design, holds in the quantized feedback systems. Next, based on this Property, a necessary and sufficient condition for the stability is derived, where the stability is characterized by the poles/zeros of a linear feedback system to be quantized. Finally, we present suboptimal dynamic quantizers for which the resulting quantized feedback systems are always stable.

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