Preparation method for reverse osmosis membrane resistant to high-temperature water environment

A preparation method for a reverse osmosis membrane resistant to a high-temperature water environment, comprising the following steps:

• (1) first, synthesis of an α-cyclodextrin@polyethylene glycol supramolecular inclusion complex (α-CD@PEG) by a saturated aqueous solution coprecipitation method:
• first, dissolving a specific quantity of polyethylene glycol in ultrapure water to prepare a polyethylene glycol saturated aqueous solution;
• then, adding α-cyclodextrin powder to the polyethylene glycol saturated aqueous solution, performing constant-temperature stirring and standing, cooling to an ambient temperature, filtering out precipitates, and drying to obtain α-cyclodextrin@polyethylene glycol powder;
• (2) preparation of an aqueous phase solution:
• dissolving a specific quantity of m-phenylenediamine, D(+) camphorsulfonic acid and triethylamine in a specific quantity of ultrapure water to prepare the aqueous phase solution;
• (3) preparation of an oil phase solution:
• dissolving a specific quantity of trimesoyl chloride in a specific quantity of n-hexane to prepare the oil phase solution;
• (4) preparation of a secondary aqueous phase solution:
• dissolving a specific quantity of the α-cyclodextrin@polyethylene glycol powder and triethylamine in a specific quantity of ultrapure water to prepare the secondary aqueous phase solution;
• (5) interfacial polymerization:
• taking a base membrane from water, blowing water away from a surface of the base membrane with nitrogen, and pouring the aqueous phase solution onto the surface of the base membrane for 30 s-180 s;
• removing the superfluous aqueous phase solution, and then blow-drying the surface of the base membrane with nitrogen;
• pouring the oil phase a solution onto the surface of the base membrane for a reaction, and then removing the superfluous oil phase solution to yield a prepared membrane;
• thermocuring the prepared membrane in an oven to form an ultrathin polyamide separation layer on the prepared membrane;
• and
• (6) secondary interfacial polymerization:
• pouring the secondary aqueous phase solution onto the ultrathin polyamide separation layer of the prepared membrane for a reaction, and then removing the superfluous solution to form an α-CD@PEG polyester protection layer on the ultrathin polyamide separation layer yielding a prepared reverse osmosis membrane;
• washing a surface of the prepared reverse osmosis membrane with ultrapure water.