Preparation method for porous superhydrophobic membrane with structural gradient changes
A structural gradient and super-hydrophobic technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of surface particle agglomeration, increase mass transfer resistance, high requirements for the selection of bonding layer materials and properties, and achieve wide application Prospect, simple preparation method, effect of increasing porosity
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Embodiment 1
[0025] A method for preparing a porous super-hydrophobic membrane with a structural gradient change, the steps are as follows:
[0026] (1) Use plasma technology to modify the base film to increase the porosity of the film; fix the base film on the supporting plate of the plasma surface treatment instrument, adjust the supporting plate to be parallel to the plasma generator, and turn on the plasma surface treatment Switch on the instrument, select the automatic mode, and set the process parameters, the radio frequency power is 50W, the gas flow rate is 200cc / min, the base film treatment time is 3min, the vacuum degree is 60Pa, and ammonia gas is introduced, and finally click the "Run" button to run Plasma generating device, complete the treatment of increasing the porosity of the PP base film, and then seal it for storage, and its porosity increases from 5.5% of the base film to 8.68%;
[0027] (2) Adopt surface coating method to prepare the composite film of micron-scale stru...
Embodiment 2
[0031] A method for preparing a porous superhydrophobic membrane with a gradient structure, the steps are as follows:
[0032] (1) Use plasma technology to modify the base film to increase the porosity of the film; fix the base film on the supporting plate of the plasma surface treatment instrument, adjust the supporting plate to be parallel to the plasma generator, and turn on the plasma surface treatment Switch the instrument, select the automatic mode, and set the process parameters, the radio frequency power is 100W, the gas flow rate is 300cc / min, the base film treatment time is 3min, the vacuum degree is 80Pa, and the mixed gas of ammonia and air is introduced, and finally click "Run ” button, run the plasma generating device, complete the process of increasing the porosity of the PP base film, and then seal it for storage, and its porosity increases from 5.5% of the base film to 11.99%;
[0033] (2) Adopt the surface coating method to prepare the composite film of micro...
Embodiment 3
[0037] A method for preparing a porous superhydrophobic membrane with a gradient structure, the steps are as follows:
[0038] (1) Use plasma technology to modify the base film to increase the porosity of the film; fix the base film on the supporting plate of the plasma surface treatment instrument, adjust the supporting plate to be parallel to the plasma generator, and turn on the plasma surface treatment Switch the instrument, select the automatic mode, and set the process parameters, the radio frequency power is 150W, the gas flow rate is 400cc / min, the base film treatment time is 3min, the vacuum degree is 120Pa, and the mixed gas of ammonia and nitrogen is introduced, and finally click "Run " button to run the plasma generating device, complete the process of increasing the porosity of the PP base film, and then seal it for storage, and its porosity increases from 5.5% of the base film to 15.29%;
[0039] (2) Adopt surface coating method to prepare the composite film of m...
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