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    Study of denaturation and composition-dependent poly(ethylene oxide)-soy protein interactions: Structures and dielectric polarization

    Date
    2018-08-15
    Author
    Zheng, Zhuoyuan
    Ma, Daowei
    Rashidi, Soheil
    Li, Bin
    Metadata
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    Citation
    Zheng, Z., Ma, D., Rashidi, S. and Li, B. (2018), Study of denaturation and composition‐dependent poly(ethylene oxide)–soy protein interactions: Structures and dielectric polarization. J. Appl. Polym. Sci., 135, 46561
    Abstract
    The significance of aggregated protein structures in tuning structures and dielectric polarization of poly(ethylene oxide) (PEO)/soy protein isolate (SPI) films was studied. The aggregated protein structures, subjected to denaturation processes, are expected to alter polymer-protein interactions, leading to diverse material structures, and properties. However, this is still insufficiently understood. In this study, SPI was modified via different denaturation processes including heat, sonication, and pH-control. According to structural analysis with scanning electron microscope, fluorescence imaging, X-ray diffraction, and Fourier transformed infrared spectroscopy, both denaturation conditions and SPI content affected PEO-SPI interactions, producing distinctive microstructures of PEO and SPI phases, which subsequently caused different dielectric properties in ferroelectric analysis. Particularly, sonication treated-SPI distinguished itself by generating a unique parabolic-like composition dependence of dielectric polarization, in contrast to other modified SPIs. Polymer/protein blends have shown great potential in biomedical and electronic applications, which will be further benefited by the findings in this study.
    Description
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    URI
    http://dx.doi.org/10.1002/app.46561
    http://hdl.handle.net/10057/15237
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