Preparation of zinc oxide loaded polyurethane/polysulfone composite nanofiber membrane and study on its waterproof and moisture permeability properties

ACs@ZnO incorporated with a PSF/PU polymer membrane for dye removal

“…Due to the presence of the pore creator ACs/ ZnO, which causes thermodynamic instability in the casting solution and increases the material's hydrophilic nature, the measurement of water uptake and swelling ratio of the plain PSF/PU (M 1 ) membrane has been shifted to the modified PSF/ PU@ACs/ZnO membrane. 25 Additionally, the uptake percentage contributes to the swelling ratio by increasing the amount of the hydrophilic polymer. The results show that the modified membrane is more hydrophilic in nature.…”

Super-Elastic Fluorinated Polyurethane Nanofibrous Membranes with Simultaneously Waterproof and Breathable Performance

“…Generally recognized as “second skin”, the ordinary textile would lose its comfortable and protective function under extreme conditions, such as rain, snow, marsh, and desert, which can result in serious health issues for humans (rheumatic pain, cold, joint pain, etc. ). − Recently, waterproof and breathable textiles, which could effectively hamper the invasion of liquid water but allow water vapor to transmit, have become attractive candidates for humans to provide a comfortable microclimate environment and timely protection. − As core components of waterproof and breathable textiles, the waterproof and breathable membranes (WBMs) with hydrophilic compact or hydrophobic microporous structures can be distinguished according to the physical structure. , The dense polyurethane films, a typical representative of hydrophilic nonporous WBMs, exhibit effective water resistance owing to their inherently dense structure, and their breathable performance could be achieved by employing the absorption–diffusion–desorption transfer mode of moisture. For microporous membranes, such as the biaxial stretching polytetrafluoroethylene membranes, the internal pores of 0.2–3 μm could effectively transfer the water vapor with nano-scale size and resist liquid water with large-scale microsize (∼100 μm). , Compared with the moisture transfer mode of nonporous membranes, the connected hydrophobic micropores are deservedly quick to transport water vapor.…”

“…5−7 As core components of waterproof and breathable textiles, the waterproof and breathable membranes (WBMs) with hydrophilic compact or hydrophobic microporous structures can be distinguished according to the physical structure. 8,9 The dense polyurethane films, a typical representative of hydrophilic nonporous WBMs, exhibit effective water resistance owing to their inherently dense structure, and their breathable performance could be achieved by employing the absorption−diffusion−desorption transfer mode of moisture. For microporous membranes, such as the biaxial stretching polytetrafluoroethylene membranes, the internal pores of 0.2−3 μm could effectively transfer the water vapor with nano-scale size and resist liquid water with large-scale microsize (∼100 μm).…”

Polyurethane-Coated Polyaniline/SiO2 Nanoparticle Electrospun Nanofiber Membranes for Waterproof and Moisture-Permeable Materials

“…Zhang et al grafted zinc oxide nanoparticles (ZnO-NPs) to the surface of a polyurethane/polysulfone (PU/PSF) electrospun nanofiber membrane and then hydrophobically modified ZnO-NPs with hexadecyltrimethoxysilane (HDTMS). A composite fiber membrane with a water contact angle (WCA) of 149°, water vapor transmission rate (WVTR) of 9.6 kg·m 2 ·d –1 , and excellent UV resistance was obtained . Liu et al introduced 2-hydroxy-4-methoxybenzopohenone and hydrophobic nanotitanium dioxide to a PVDF solution and prepared a waterproof and breathable film with a WCA of 146°, a WVTR of 10.6 kg·m 2 ·d –1 , and excellent UV resistance using a short-chain fluoroalkylsilane as the coupling agent .…”