MnO₂ nanorods with controllable scale were grown in the PVDF-g-PMAA modified membrane to form PVDF-g-PMAA@ MnO₂ membrane through the in situ redox reaction of KMnO₄ solution, which is confirmed by scanning electron microscopy (SEM) and X-ray energy-dispersion spectroscopy (EDX). The pore size of the membrane decreased with the increase of KMnO₄ solution concentration. The thermodynamic stability and the hydrophilicity of the membrane were also enhanced by the MnO₂ nanorods. The water flux, bovine serum albumin (BSA)/Lysozyme protein solution flux and rejection, flux recovery, etc. showed effective improvement of the anti-fouling performance of the PVDF-g-PMAA@ MnO₂ membrane. More importantly, it can effectively separate BSA from lysozyme, which provided a potential application in the field of biology, food, and other industrial fields for the requirement of separation and purification.

通过KMnO ₄溶液的原位氧化还原反应，在PVDF-g-PMAA改性膜中生长了尺寸可控的MnO ₂纳米棒，形成PVDF-g-PMAA@MnO ₂膜，扫描电子显微镜（SEM）和X 射线能量色散光谱 (EDX)。膜孔径随着KMnO ₄溶液浓度的增加而减小。MnO ₂纳米棒还增强了膜的热力学稳定性和亲水性。PVDF-g-PMAA@MnO ₂的水通量、牛血清白蛋白（BSA）/溶菌酶蛋白溶液通量和排斥反应、通量回收率等均显示出有效提高的防污性能膜。更重要的是，它可以有效地将BSA与溶菌酶分离，为生物、食品等工业领域的分离纯化需求提供了潜在的应用。