Electrodeposition of hyaluronic acid and hyaluronic acid–bovine serum albumin films from aqueous solutions
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Hyaluronic acid (HYH) films were prepared from aqueous sodium hyaluronate (HYNa) solutions by anodic electrodeposition. The film thickness was varied in the range of 0-20 microm by the variation of the deposition time and HYNa concentration. The deposition rate was low at HYNa concentration below 1 g L(-1) and increased significantly in the range of 3-5 g L(-1). The addition of bovine serum albumin (BSA) to the HYNa solutions resulted in increased deposition yield, which was attributed to the formation of composite HYH-BSA films. The thickness of the HYH-BSA films deposited by anodic electrodeposition was varied in the range of 0-80 microm. The HYH and composite HYH-BSA films were studied by scanning electron microscopy, thermogravimetric analysis, differential thermal analysis, Fourier transform infrared spectroscopy and circular dichroism spectroscopy. The deposition mechanism and kinetics of deposition are discussed.
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