Abstract
This study modified hydrogels prepared from silk fibroinand graphene oxideby injecting plasma into the silk. The SF-GO hydrogels, modified by plasma jet with different discharge time (30, 90, and 150 s) and working gases (argon, air, helium), undergo electrochemical AC impedance spectrum tests. After hydrogel modification with the plasma of any working gas, the impedance in the very low frequency (10−2∼100 Hz) decreased with a longer plasma discharge time. In the very low frequency, the sequence of impedance change is Ar group <air group ≈ He group <empty. The electric capacity of the hydrogel showed an increasing trend with those modified by argon plasma and a decreasing trend for those hydrogels modified by air and helium plasma. The sequence of electric capacity change is Ar group >empty >air group >He group. Fourier transform infrared spectrum, and X-ray diffraction spectrum showed a reduction of β-fold structure and graphene oxide content in SF-GO hydrogels modified by plasma.
Published Version
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