A method for constructing a functional ordered porous membrane using a honeycomb porous membrane as a template
A porous membrane, honeycomb-like technology, applied in the field of functional ordered porous composite membrane preparation, can solve the problems of difficult to meet complex uses, limited application of ordered porous membranes, no composite functional materials, etc., to achieve selective induction The effect of distribution, short preparation period and simple technical process
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[0029] The preparation method of the porous membrane in the present invention is as follows: the polymer is dissolved in an organic solvent to form a solution with a certain concentration, and the solution is allowed to stand. Take 10~100µL polymer solution on a clean glass slide with a micro-sampler, and blow the surface of the solution with water-saturated moist air. After the solvent and water are volatilized, a honeycomb porous membrane is obtained. The pore size of the porous membrane can be adjusted by changing the concentration of the solution, the humidity and the amount of liquid added, and a porous membrane with a diameter of 200nm~10μm and a monodisperse pore size can be obtained. The change in pore size is shown in Figure 1.
[0030] The principle of preparing porous membrane by this method is [µ. H. F. Bµnz, Advanced Materials 18, 973-989(2006)]: after the polymer solution is poured onto the substrate, the solvent volatilizes, causing the solution film and the sur...
Embodiment 1
[0038]Take a certain amount of polymer polystyrene / acrylic block copolymer and dissolve it in chloroform, let it fully dissolve, and prepare a solution with a concentration of 1 wt%. Then take 100 µL of the polymer solution on a clean glass slide with a micro-sampler, and blow the surface of the solution with water-saturated moist air. After the solvent and water are volatilized, a honeycomb porous membrane is obtained. Take it out and observe the quality of the porous membrane with an optical microscope or a field emission scanning electron microscope.
[0039] Then immerse the ordered porous membrane in the aqueous dispersion of 2 mg / mL ceria nanoparticles and let it stand for 24 hours, finally take out the porous membrane and dry it to obtain a functional ordered porous composite membrane. The effect of selective distribution of nanoparticles was observed with scanning electron microscopy.
Embodiment 2
[0041] Take a certain amount of polymer polystyrene / acrylic block copolymer and dissolve it in chloroform, let it fully dissolve, and prepare a solution with a concentration of 5wt% for later use. Then use a microsampler to take 50 µL of the polymer solution on a clean glass slide, and blow the surface of the solution with water-saturated moist air. After the solvent and water are volatilized, a honeycomb porous membrane is obtained. Take it out and observe the quality of the porous membrane with an optical microscope or a field emission scanning electron microscope.
[0042] Then immerse the ordered porous membrane in a 5 mg / mL aqueous dispersion of ceria nanoparticles and let it stand for 20 hours, and finally take out the porous membrane and dry it to obtain a functional ordered porous composite membrane. The effect of selective distribution of nanoparticles was observed with scanning electron microscopy.
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