In this study we show a possibility to produce thermoresponsive, free-standing microgel membranes based on N-isopropylacrylamide (NIPAM) and the UV-sensitive comonomer 2-hydroxy-4-(methacryloyloxy)benzophenone (HMABP). To influence the final network structure and functionality of the membranes, we use different cross-linkers in the microgel syntheses and characterize the resulting structural microgel properties and the swelling behavior by means of AFM, FTIR, and PCS measurements. Varying the cross-linker results in significant changes in the structure and swelling behavior of the individual microgels and has an influence on the incorporation of the comonomer, which is essential for subsequent photochemical membrane formation. We investigate the ion transport through the different membranes by temperature-dependent resistance measurements revealing a sharp increase in resistance when the copolymer microgels reach their collapsed state. The resistance of the membranes can be adjusted by different cross-linkers and the associated incorporation of the comonomer. Furthermore, we show that transferring a reversible cross-linker from a cross-linked state to an un-cross-linked state strongly influences the membrane properties and even reverses the switching behavior, while the mechanical stability of the membrane is maintained.
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Clodt, Juliana Isabel
Filiz, Volkan
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Filiz, Volkan
Rangou, Sofia
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Rangou, Sofia
Buhr, Kristian
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Buhr, Kristian
Abetz, Clarissa
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Abetz, Clarissa
Hoeche, Daniel
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Helmholtz Zentrum Geesthacht, Inst Mat Res, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Hoeche, Daniel
Hahn, Janina
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Hahn, Janina
Jung, Adina
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Jung, Adina
Abetz, Volker
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Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Clodt, Juliana Isabel
Filiz, Volkan
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Filiz, Volkan
Rangou, Sofia
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Rangou, Sofia
Buhr, Kristian
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Buhr, Kristian
Abetz, Clarissa
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Abetz, Clarissa
Hoeche, Daniel
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Inst Mat Res, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Hoeche, Daniel
Hahn, Janina
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Hahn, Janina
Jung, Adina
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h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
Jung, Adina
Abetz, Volker
论文数: 0引用数: 0
h-index: 0
机构:
Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, GermanyHelmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany