Nanosized silica sphere/polypiperazine-amide nano composite nanofiltration membrane and preparation method thereof
A technology of polypiperazine amide and nano-silicon oxide, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of high energy consumption and cost, and the introduction of nano-silicon oxide spheres into polypiperazine amide nanofiltration membranes , low water flux and other issues, to achieve the effect of improved hydrophilicity, favorable water flux, and stable separation performance
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Embodiment 1
[0031] (1) Add a certain amount of piperazine monomer to deionized water to make its concentration reach 0.2w / v%, then add a certain amount of sodium dodecylsulfonate to the solution to make its concentration reach 0.005w / v% , and then adjust the pH value of the above solution to 10 with sodium phosphate, mix uniformly to form an aqueous phase solution, then immerse the polysulfone ultrafiltration support membrane with a pore size of 60 nanometers in the aqueous phase solution for 2 minutes, and then The polysulfone ultrafiltration support membrane is taken out, and excess aqueous phase solution on its surface is removed.
[0032] (2) trimesoyl chloride is added in the Isopar G type mixed hydrocarbon, and it is prepared into a 0.2w / v% oil phase solution, and then adding nano-silicon oxide balls with a size of 230 nanometers to make its concentration reach 0.06w / v %, and formed a uniform oil phase solution by ultrasonic treatment for 40 minutes; then the polysulfone ultrafiltra...
Embodiment 2
[0035] The nano-silica sphere / polypiperazine amide nanocomposite nanofiltration membrane was prepared by the method in Example 1, the only difference being that the immersion time of the polysulfone ultrafiltration support membrane in the aqueous phase solution was 0.5 minutes.
Embodiment 3
[0037]The nano-silica sphere / polypiperazine amide nanocomposite nanofiltration membrane was prepared by the method in Example 1, the only difference being that the immersion time of the polysulfone ultrafiltration support membrane in the aqueous phase solution was 20 minutes.
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