Preparation of composite membrane
Weigh a certain amount of silicone rubber, dissolve it in n-heptane, and stir evenly at room temperature until the PDMS is completely dissolved. In addition, weigh a certain mass of Cu3(BTC)2 (the content calculation formula is as formula (4-1)), dry it at a certain temperature, and make it uniformly dispersed in n-heptane. Then the completely dissolved PDMS solution was added to the solution several times, and the mixed solution was alternately stirred and ultrasonically treated until the solution was evenly mixed. Finally, a certain amount of cross-linking agent was added to the mixed solution, and then the prepared membrane solution was poured on the base membrane fixed on the glass plate, and a modified PDMS/PEI asymmetric flat plate composite was prepared with a wire rod Film Applicator. membrane.
