Improving waterproof and breathability of nanofibrous polyurethane-poly(vinylidene fluoride) hybrid membrane

Document Type : Research Article

Authors

1 MSc,, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran

2 Department of Textile Engineering, Yazd University, Yazd, Iran

amnc.2021.9.36.1

Abstract

In this study, a waterproof hybrid nanofibrous membrane with breathability and high resistance to water penetration was prepared. For this purpose, polyurethane-poly(vinylidene fluoride) hybrid nanofibers with different ratios and with addition of silica nanoparticles were produced by electrospinning method. The effect of different ratios of the studied polymers on the morphology and performance of nanofibrous membranes such as breathability and waterproof properties were studied. Scanning electron microscopy and analysis of air permeability, hydrostatic pressure and water vapor permeability were used for this purpose. Morphological study of hybrid nanofibrous membrane shows the fabrication of uniform and bead-free fibers with average diameter of 60 to 80 nm. Moreover, increasing the ratio of PVDF polymer in nanofibrous membrane by 70% increased their air permeability and hydrostatic pressure. The results also show that the nanofibrous membrane containing 70:30 PVDF/PU, exhibits better breathability and waterproof properties, as its air permeability and water vapor permeability were obtained 68.6 mL/cm2.s and 2853 g/m2/day, respectively.

Keywords


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