Magnesium and magnesium alloy surface covalent bond combined macromolecule film layer and preparation technology
A surface covalent, composite film technology, applied in the direction of electrolytic organic material coating, etc., can solve the problems of affecting the actual size of the device, affecting the service life of the magnesium alloy implanted device, reducing the mechanical support force, etc., achieving good uniformity and improving Combination, good effect
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Embodiment 1
[0026] A preparation process of a polymer composite film layer covalently bonded on the surface of a magnesium alloy, comprising the following steps:
[0027] (1) The 100mL graft solution prepared by this example is composed of: the solvent is dimethylformamide, the graft monomer is ethyl acrylate, the proton source is tetraethyl ammonium perchlorate, and the ethyl acrylate in the graft solution is composed of: The concentration is 1.5 mol / L, and the concentration of tetraethylammonium perchlorate is 0.05 mol / L;
[0028] (2) Using the polished Mg-2Zn-0.5Y-0.5Nd (for the specific preparation process, please refer to the patent ZL201110043303.8) alloy matrix as the working electrode, the platinum sheet as the reference electrode, and the platinum wire electrode as the auxiliary electrode. The grafting reaction was carried out by cyclic voltammetry in the graft solution. The parameters used were: the voltage scanning range was -2~-3.8 V relative to the platinum sheet electrode, t...
Embodiment 2
[0036] A preparation process of a polymer composite film layer covalently bonded on the surface of a magnesium alloy, comprising the following steps:
[0037] (1) The 100mL graft solution prepared by this example is composed of: the solvent is dimethylformamide, the graft monomer is ethyl acrylate, the proton source is tetraethylammonium perchlorate, and the ethyl acrylate concentration in the graft solution is 1.0 mol / L, and the concentration of tetraethylammonium perchlorate is 0.05 mol / L;
[0038](2) Using the polished Mg-2Zn-0.5Y-0.5Nd alloy substrate as the working electrode, the platinum sheet as the reference electrode, and the platinum wire electrode as the auxiliary electrode, the grafting reaction was carried out by galvanostatic method in the grafting solution. , the parameters used are: the current size is 2 mA, the reaction time is 15 min, and the polyethyl acrylate (PEA) layer is obtained.
[0039] (3) The bottom layer was reacted with a xylene solution containi...
Embodiment 3
[0042] A preparation process of a polymer composite film layer covalently bonded on the surface of a magnesium alloy, comprising the following steps:
[0043] (1) The 100mL grafting solution prepared by this example is composed of: the solvent is dimethylformamide, the grafting monomer is hydroxyethyl methacrylate, the proton source is tetraethylammonium perchlorate, and in the grafting solution, methyl methacrylate The concentration of hydroxyethyl acrylate was 1.5 mol / L, and the concentration of tetraethylammonium perchlorate was 0.025 mol / L;
[0044] (2) Using the polished Mg-2Zn-0.2Ca alloy substrate as the working electrode, the platinum sheet as the reference electrode, and the platinum wire electrode as the auxiliary electrode, the grafting reaction was carried out by cyclic voltammetry in the grafting solution. The parameters used are: the voltage scanning range is -2~-6 V relative to the platinum electrode, the number of cycles is 7, the scanning rate is 20 mV / s, and ...
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