| Summary: | 碩士 === 長庚大學 === 化工與材料工程研究所 === 91 === This thesis reports modifications of polyanilines (PAns) by incorporation with two kind of anhydride: Maleic anhydride (MA) and Succini anhydride (SA). Two kinds of water-soluble self-acid-doped PAn (MPAn and SPAn) were successfully synthesized.
In solubility test, the dry poly[N-(1-one-2-vinyl-butyric acid)]aniline and poly[N-(1-one-butyric acid)]aniline are well soluble in polar solvents NMP and partially soluble in DMSO, but their sodium salts can dissolve in DI water. They are proved as true solutions follow Beer's Law in UV-Vis near IR spectra. We confirmed that MPAn and SPAn and their sodium salt have carboxyl side chain structures as analyzed with FTIR spectra. In cyclic voltammogram analysis (CV), we found MPAn and SPAn all have electroactivity. Both MPAn and SPAn show a higher potential for the first redox process and a lower potential for the second redox process in comparison to those of polyaniline and this phenomenon becomes more obvious with the longer chain length. In CV analysis with various pH values, the first redox reaction does not involve protonation or deprotonation. However, the second redox reaction involves two protons for each electron in the pH ranges from -0.2 to 1.46. In titration and conductivity analysis, the doping levels of MPAn and SPAn are 48.0% and 32.9%, and the graft percents are 52.6% and 38.3%, respectively. Meanwhile, we also confirm the existing of doping phenomenon. This is consistent with the result of the UV-Vis near IR and FTIR spectra. In thermogravimetric analysis of MPAn Na and SPAn Na, the peak of broken backbone of MPAn Na shifts to lower temperature than that of SPAn Na. In Fluorescence spectra analysis, we found that modified MPAn10H, MPAn15 H, MPAn20 H, MPAn30 H, MPAn40 H and SPAn10 H can be immobilized protein.
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