Scaling-resistant and yellowing-resistant reverse osmosis composite membrane and preparation method thereof

A preparation method of a scaling-resistant and yellowing-resistant composite reverse osmosis membrane, wherein, comprising following steps:

• (1) dissolving ethylene glycol methacrylate (EGMA) in anisole, and ultrasonically stirring to mix evenly;
• then sequentially adding a first initiator and 2-dodecylsulfanylthiocarbonylsulfanyl-2-methyl propionic acid (DMP) as a chain transfer agent, sealing and vacuum mixing at 25° C. for 5 h to obtain a product;
• precipitating the product into a large amount of petroleum ether, then separating the product by filtration, and then vacuum drying the product at 40° C. for 24 h to obtain poly(ethylene glycol) methacrylate (PEGMA) particles;
• (2) immersing a polysulfone supported membrane in pure water in advance for cleaning, and removing excess water via a rubber roller, then putting the polysulfone supported membrane in an aqueous phase solution for 15 seconds-60 seconds and in an oil phase solution for 15 seconds-60 seconds, and performing heat treatment for the polysulfone supported membrane to obtain a primary composite reverse osmosis membrane;
• and
• (3) adding 2-(methacryloyloxy)ethyl)dimethyl-3-sulphoproyl) ammonium hydroxide (MEDSAH) and N-(isobutoxymethyl) acrylamide (IBMA) to tetrahydrofuran to mix evenly, and then adding azobisisobutyronitrile (AIBN) as a second initiator to obtain a solution;
• putting the primary composite reverse osmosis membrane prepared in the step (2) in the solution for ultrasonic reaction at 25° C. for 24 h, to obtain the scaling-resistant and yellowing-resistant composite reverse osmosis membrane.