A kind of reverse osmosis membrane with low energy consumption and large flux and its preparation method and application
A technology of reverse osmosis membrane and large flux, applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of easy shedding, lower desalination rate, difficulty in preparing inorganic nanoparticles, etc., and achieve hydrophilicity Enhanced performance, high hydrophilicity, and excellent permeability
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Embodiment 1
[0057] The polysulfone supported membrane prepared by the above method is adopted, and the reverse osmosis membrane is prepared by the following method:
[0058] (1) Prepare an aqueous solution with mass concentrations of 2.5wt% m-phenylenediamine, 1wt% sodium hydroxymethanesulfonate and 0.05% isopropanolamine, and stir at room temperature to dissolve completely.
[0059] (2) The polysulfone supported membrane was contacted with the above-mentioned aqueous phase solution for 30s, after removing excess water on the membrane surface, and then contacted with the organic phase solution containing 0.15wt% trimesoyl chloride and 0.16wt% tributyl phosphate for 30s, the interface Polycondensation forms a polyamide composite film; wherein, the organic phase solvent is isopar G isoparaffin.
[0060] (3) After the composite membrane was vertically drained in the air for 1min, it was treated in hot air at 100°C for 6min; then it was successively entered into methanol aqueous solution with...
Embodiment 2-8
[0062] The cross-linked aromatic polyamide reverse osmosis membrane was prepared according to the method in Example 1, and the difference was only in the types and proportions of raw materials shown in Table 2.
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