Fabrication of Durable PVDF Nanofiber Composite Membrane with Superhvdrophobicitv by Electro-Spinning for Direct Contact Membrane Distillation

摘要

Although hydrophobic nanofiber membranes are considered as promising candidates for membrane distillation (MD) application due to their high porosity and hydrophobicity, they still suffer performance instability in long-term direct contact membrane distillation (DCMD) process [1]. The possible solution to enhance the wetting resistance of nanofiber membranes is to shift the hydrophobicity of membranes to superhydrophobicity. In this research, superhydrophobic membranes were fabricated facilely by designing a hierarchical structure on polyvinylidene fluoride (PVDF) nanofiber membrane surface via electro-spinning of a PVDF dope blended with modified-SiO2 nano-particles.