Robust hydrophobic polyurethane fibrous membranes with tunable porous structure for waterproof and breathable application

Electrospun composite nanofibre fabrics containing green reduced Ag nanoparticles as an innovative type of antimicrobial insole

“…The increase of solution conductivity leads to strong electrically driven stretching forces during the electrospinning, which will benet the orientation and stretching of the chains along the bre axis. [31][32][33] The membranes exhibited increased tensile strength from 7.31 AE 0.54 to 9.19 AE 0.83 MPa with the formation of Ag NPs, which can be caused by orientation of the macromolecule in the bres. However, the nal elongation at the breakage of PVA/Ag NP membranes decreased greatly, compared with the neat PVA brous membranes, which is shown in Fig.…”

Waterproof and Breathable Electrospun Nanofibrous Membranes

“…The above‐mentioned doping modifications show limited effect on improving hydrophobicity of extremely hydrophilic nanofibers, such as PAN, polyvinyl alcohol (PVA), and electrospun inorganic nanofibers. In view of this, many researchers have applied surface modification treatment to develop W&B membranes with hydrophobic materials including FPU, fluoroalkylsilane (FAS), polydimethylsiloxane (PDMS), and amino‐silicone oil (ASO) . Combining the virtues of high porosity of nanofibers and hydrophobic property of surface modification layer, this strategy could realize the effective regulation of pore structure and surface wettability of electrospun membranes simultaneously, which is applicable to construct electrospun W&B membranes .…”

“…Through varying immerging time and concentration of modifier, we can effectively decrease pore size and enhance hydrophobicity of membranes. So far many researchers fabricated electrospun W&B membranes through hydrophobic coating with low surface energy materials, including fluoropolymers and siloxanes . Here, the employed electrospun nanofibers can be PAN nanofibers and even be SiO 2 nanofibers.…”

Preparation and properties of fluorinated silicon two‐component polyurethane hydrophobic coatings

“…Polyurethane (PU) is a multi‐purpose synthetic resin with various product forms. It is widely used in transportation, construction, electronic equipment, synthetic leather, healthcare and other fields, and adopts the form of foam plastics, elastomers, coatings, adhesives, waterproof materials etc. PU coating has outstanding properties such as good flexibility, wear resistance, high strength and strong adhesion, but it limits actual extensive applications in many industries because of its low thermal stability and mechanical strength .…”