Laccase–Cu<sub>3</sub>BTC<sub>2</sub> Prepared\nvia a Biomimetic Mineralization Method and Its Effect on the Performance\nof a Poly(vinylidene fluoride) (PVDF) Membrane (BTC = Benzene-1,3,5-tricarboxylate)

Laccase–Cu<sub>3</sub>BTC<sub>2</sub> was synthesized\nfrom\nlaccase and Cu<sub>3</sub>BTC<sub>2</sub> metal–organic skeleton\nmaterials and doped with the highly hydrophilic amphiphilic polymer\npolyvinylidene fluoride-<i>graft</i>-poly(ethylene glycol)\nmethyl ether methacrylate (PVDF-<i>g</i>-PEGMA) as a bimodifier\nin the casting solution using in situ synthesis to prepare high-flux\npoly(vinylidene fluoride) (PVDF) membranes. Due to the high hydrophilicity\nof PVDF-<i>g</i>-PEGMA and laccase–Cu<sub>3</sub>BTC<sub>2</sub>, the PVDF-modified membranes were more hydrophilic;\nthe water contact angle decreased from 93.45° to 79.46°.\nIt exhibited optimal performance when its mass fraction relative to\nPVDF was 8.0%. Pure water flux and the sodium alginate retention rate\nreached 1975.61 L/(m<sup>2</sup>·h) and 87.79%, respectively,\nand the flux recovery and reversible and irreversible contamination\nratio were 84.64%, 71.07%, and 15.36%, respectively, substantially\nenhancing the pollution resistance of the PVDF membrane.