Polydopamine/manganese dioxide composite membrane and preparation method thereof
A polydopamine and manganese dioxide technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of few types of modifiers, achieve low equipment requirements, increase uniform dispersion, and good affinity. The effect of water anti-pollution properties
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Embodiment 1
[0020] A kind of preparation method of polydopamine / manganese dioxide composite film, concrete steps are:
[0021] 1) Preparation of polydopamine surface coating film: put dopamine hydrochloride (initial concentration in the mixed solution: 2 mg / L) into 10 mM Tris solution, and set the volume to 200mL to obtain a mixed solution; commercial polydopamine The vinylidene fluoride microfiltration membrane was immersed in the mixed solution, stirred at room temperature for 24 hours, washed with water, placed in a vacuum drying oven, and dried at 30°C to obtain a polydopamine surface-coated membrane, which was then used;
[0022] 2) Preparation of a polydopamine / manganese dioxide composite film: immerse the polydopamine surface-coated film in 20 mL of 0.6 mM potassium permanganate solution and 0.2 mL of 1 M H2SO4 mixed solution, shake at room temperature for 2 minutes, Take it out, wash it with water, and dry it at 50°C to obtain a polydopamine / manganese dioxide composite film.
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Embodiment 2
[0025] A kind of preparation method of polydopamine / manganese dioxide composite film, concrete steps are:
[0026] 1) Preparation of polydopamine surface coating film: put dopamine hydrochloride (initial concentration in the mixed solution: 4 mg / L) into 10 mM Tris solution, and set the volume to 200mL to obtain a mixed solution; commercial polydopamine The vinylidene fluoride microfiltration membrane was immersed in the mixed solution, stirred at room temperature for 24 hours, washed with water, placed in a vacuum drying oven, and dried at 30°C to obtain a polydopamine surface-coated membrane, which was then used;
[0027] 2) Preparation of a polydopamine / manganese dioxide composite membrane: immerse the polydopamine surface-coated membrane in 20 mL of 0.6 mM potassium permanganate solution and 0.3 mL of 1 M H2SO4 mixed solution, and shake at room temperature for 2 minutes , taken out, washed with water, and dried at 50°C to obtain a polydopamine / manganese dioxide composite fi...
Embodiment 3
[0030] A kind of preparation method of polydopamine / manganese dioxide composite film, concrete steps are:
[0031] 1) Preparation of polydopamine surface coating film: put dopamine hydrochloride (initial concentration in the mixed solution: 6 mg / L) into 10 mM Tris solution, and set the volume to 200 mL to obtain a mixed solution; commercial polydopamine The vinylidene fluoride microfiltration membrane was immersed in the mixed solution, stirred at room temperature for 24 hours, washed with water, placed in a vacuum drying oven, and dried at 30°C to obtain a polydopamine surface-coated membrane, which was then used;
[0032] 2) Preparation of a polydopamine / manganese dioxide composite membrane: immerse the polydopamine surface-coated membrane in 20 mL of 0.6 mM potassium permanganate solution and 0.4 mL of 1 M H2SO4 mixed solution, and shake at room temperature for 2 minutes , taken out, washed with water, and dried at 50°C to obtain a polydopamine / manganese dioxide composite f...
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