Metal micro-filtration membrane as well as preparation method and application thereof
A microfiltration membrane and metal technology, applied in chemical instruments and methods, membranes, ultrafiltration, etc., can solve the problems of high preparation cost of metal microfiltration membranes, difficulty in large-scale production, and discontinuous production, and achieve low cost, The effect of high controllability and low price
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Embodiment 1
[0032] Step 1, prepare A solution (the concentration of each component in the A solution is respectively 70g / L NaOH, 40g / LNa 2 CO 3 , 30g / LNa 3 PO 4 and 5g / L Na 2 SiO 3 ), then immerse the 400-mesh stainless steel mesh in A solution, immerse at a constant temperature of 90°C for 30min, and then immerse in 30% (wt) HCl solution for 60s, 10% (wt) H 2 SO 4 In the solution for 30s, the pretreated stainless steel mesh is obtained;
[0033] Step 2, prepare B solution (concentration of each component is respectively 110g / L CuSO in the B solution 4 , 40g / LH 2 SO 4 and 20mg / LHCl), then the pretreated stainless steel mesh is placed in the B solution, and connected to the negative electrode of the DC power supply, the copper plate of the same size is placed in the B solution, and connected to the positive electrode of the DC power supply, the stainless steel mesh is set in parallel with the copper plate, and The distance between the two is 10cm, and the current density is set to...
Embodiment 2
[0037] The difference from Example 1 is that CuSO used in step 24 The concentration is 220g / L, the distance between the stainless steel mesh and the copper plate is 7cm, and the current density is 0.06A / cm 2 , the deposition time is 60min.
[0038] Result: the SEM topography of the metal microfiltration membrane that the present embodiment makes is as follows figure 1 as shown in c;
[0039] The thickness of the metal microfiltration membrane prepared in this embodiment is 35 mm, the average pore diameter of the membrane is 1.3 microns, and the membrane flux is 160 L / m 2 h, the applicable pH range is 4-11, good reusability and good processability.
Embodiment 3
[0041] The difference from Example 1 is that CuSO used in step 2 4 The concentration is 330g / L, the distance between the stainless steel mesh and the copper plate is 5cm, and the current density is 0.08A / cm 2 , The deposition time is 75min.
[0042] Result: the SEM topography of the metal microfiltration membrane that the present embodiment makes is as follows figure 1 as shown in d;
[0043] The thickness of the metal microfiltration membrane prepared in this embodiment is 55 mm, the average pore diameter of the membrane is 0.8 micron, and the membrane flux is 120 L / m 2 h, suitable for pH range 4-11, reusable performance, good processability.
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