In this work, the superhydrophobic polypropylene (PP) composite membranes with modified surface were successfully fabricated by loading the SiO₂ nanoparticles and attaching low surface energy 1H,1H,2H,2H-perfluorodecyltriethoxysilane. The impact of deposited nanoparticle size on the surface roughness, heterogeneous nucleation barrier and critical nucleus size versus the loaded nanoparticle size (d^∗_nuclear/d) was simulated by the model combining the surface roughness and superhydrophobility with the critical nucleation energy. The optimized loaded nanoparticles size maintained the proper roughness and d^∗_nuclear/d to ensure the desired performance of antifouling. The improved superhydrophobic surface enhanced the anti-wetting ability of the membrane for vacuum membrane distillation (VMD) purpose. The resulting modified membrane possessed good anti-wetting ability and stable anti-fouling performance during long-term continuous and batch operation of VMD treating high salinity water system. The fouling rate of the fabricated membrane was decreased to 20% of the one of the original membrane under 15 wt% high salinity feed condition.

在这项工作中，通过负载SiO ₂纳米粒子并附着低表面能1H，1H，2H，2H-全氟癸基三乙氧基硅烷成功地制备了具有改性表面的超疏水聚丙烯（PP）复合膜。通过将表面粗糙度和超疏水性与临界成核能相结合的模型，模拟了沉积的纳米粒子尺寸对表面粗糙度，异质成核屏障和临界核尺寸与负载纳米粒子尺寸（d ^* _nuclear / d）的影响。优化的负载纳米颗粒尺寸保持适当的粗糙度和d ^*_核/ d以确保所需的防污性能。改进的超疏水表面增强了膜在真空膜蒸馏（VMD）方面的抗湿能力。所得改性膜在VMD处理高盐度水系统中长期连续和间歇运行期间具有良好的抗湿能力和稳定的防污性能。在15wt％的高盐度进料条件下，制得的膜的结垢率降低至原始膜之一的20％。