A kind of Prussian blue/carboxymethyl cellulose gel modified composite film and its preparation method and application
A carboxymethyl cellulose and Prussian blue-like technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of poor membrane mechanical properties, poor pollution resistance, poor flexibility, etc., and achieve good stability , low price, simple preparation method
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Embodiment 1
[0031] Step 1: Preparation of LPB modified nickel mesh
[0032] Cut the nickel mesh into 2×2 cm and add 40 mL of HCl with a concentration of 0.1 mol / L and K with a concentration of 0.1 mol / L 4 Fe(CN) 6 ·3H 2 The mixed solution of O was added into the reaction kettle, reacted at 75°C for 6h, and then taken out. After the reactor was cooled to room temperature, the product was taken out, cleaned with deionized water, and dried in an oven at 45°C to obtain LPB modified nickel mesh.
[0033] Step 2: Preparation of LPB-CMC modified composite membrane
[0034] The LPB modified nickel mesh was sequentially impregnated into 0.1 wt% sodium carboxymethylcellulose (CMC) solution and FeCl 3 After soaking in the solution for 3 minutes, take it out, put it in an oven to dry for 3 minutes, take it out and continue to immerse. After repeating the operation 10 times, put it in an oven and dry it at 45°C to obtain the LPB-CMC-1 modified composite membrane.
[0035] Step 3: Oil-water mixtu...
Embodiment 2
[0041] Step 1: Preparation of LPB modified nickel mesh
[0042] Cut the nickel mesh into 2×2cm and 30mL of HCl with a concentration of 0.2mol / L and K with a concentration of 0.2mol / L 4 Fe(CN) 6 ·3H 2 The mixed solution of O was added into the reaction kettle, reacted at 85°C for 4h, and then taken out. After the reactor was cooled to room temperature, the product was taken out, cleaned with deionized water, and dried in an oven at 45°C to obtain LPB modified nickel mesh.
[0043] Step 2: LPB-CMC modified composite membrane
[0044] The LPB modified nickel mesh was sequentially impregnated into 0.2 wt% sodium carboxymethylcellulose (CMC) solution and FeCl 3 After soaking in the solution for 3 minutes, take it out, put it in an oven to dry for 5 minutes, take it out and continue to immerse. After repeating the operation 3 times, put it in an oven and dry it at 45°C to obtain the LPB-CMC-2 modified composite membrane.
[0045] Step 3: Oil-water mixture separation experiment...
Embodiment 3
[0048] Step 1: Preparation of LPB modified nickel mesh
[0049] Cut the nickel mesh into 2×2 cm and 50 mL of HCl with a concentration of 0.1 mol / L and K with a concentration of 0.1 mol / L 4 Fe(CN) 6 ·3H 2 The mixed solution of O was added into the reactor, reacted at 80°C for 5 h, and then taken out. After the reactor was cooled to room temperature, the product was taken out, cleaned with deionized water, and dried in an oven at 45°C to obtain LPB modified nickel mesh.
[0050] Step 2: LPB-CMC modified composite membrane
[0051] The LPB modified nickel mesh was sequentially impregnated into 0.15 wt% sodium carboxymethylcellulose (CMC) solution and FeCl 3 solution, take it out after soaking for 2 minutes, put it in an oven to dry for 4 minutes, take it out and continue to soak. After repeated operation 5 times, put it into an oven and dry it at 45°C to obtain LPB-CMC-3 modified composite membrane.
[0052] Step 3: Oil-water mixture separation experiment
[0053] The prep...
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