| abstract |
The invention discloses a hyperbranched antibacterial polyurethane reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane is a hyperbranched polyurethane nanofiber membrane. The preparation method of the reverse osmosis membrane comprises the following steps: firstly adopting diisocyanate and polyglycol to prepolymerize, obtaining an isocyanate group-terminated polyurethane prepolymer through chain extension and cross-linking, and then modifying it with a hydroxyl-terminated or amine-terminated hyperbranched polymer Polyurethane prepolymer is prepared to obtain isocyanate group-terminated hyperbranched polyurethane, and then the antibacterial small molecule biguanide hydrochloride is used for grafting reaction to obtain hyperbranched antibacterial polyurethane. The obtained hyperbranched antibacterial polyurethane is diluted with an organic solvent, electrospinning technology is used, and vacuum drying is used to prepare a hyperbranched antibacterial polyurethane reverse osmosis membrane. The antibacterial reverse osmosis membrane according to the present invention has stable structure, good antibacterial performance and good permeability, and has potential application value in the fields of seawater and brackish water desalination, waste water recycling, lithium ion battery diaphragm and substance separation and concentration. |