Anti-biological-pollution composite reverse osmosis membrane and preparation method thereof
An anti-biological fouling and reverse osmosis membrane technology, applied in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of poor anti-biological fouling of polyamide desalination layer, reduce the washing frequency of reverse osmosis membrane, and water flux Low-level problems, achieve good antibacterial and hydrophilic properties, excellent adsorption properties, and widen the effect of flow channels
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Embodiment 1
[0029] A preparation of anti-biological fouling composite reverse osmosis membrane, the specific implementation steps are as follows:
[0030] (1) Weigh 10g of clay mineral montmorillonite and disperse it in deionized water, add 2g of guanidine-based modifier (guanidinoacetic acid) and ultrasonically mix evenly, then add ammonia water drop by drop until the pH of the solution is 8-9, and heat up under stirring React at 35°C for 2 hours, then filter the resulting mixture with suction, wash with ethanol until neutral, freeze-dry and grind to obtain modified clay minerals for later use;
[0031] (2) Dissolve 20g of citric acid and 10g of sodium hydroxide in deionized water and mix them uniformly to prepare an acid-binding agent, then add 20g of m-phenylenediamine, 1g of dopamine and 1g of modified clay mineral to the above-mentioned acid-binding agent in sequence, Dilute to 1000g with deionized water, disperse ultrasonically for 30 minutes to form a modified aqueous solution, and...
Embodiment 2~5
[0037] The preparation method of the anti-biological fouling composite reverse osmosis membrane in Examples 2 to 5 is basically the same as that of Example 1, the only difference being: the addition of modified clay minerals and hydrophilic linking agent added in step (2) different, as shown in Table 1:
[0038] Table 1
[0039]
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