Preparation and characterization of multilayered superfine fibrous mat with the function of directional water transport

Abstract

Multilayered superfine fibrous mat with the function of directional water transport is prepared by dual-mode electrospinning.

Tuning In‐Plane Wicking Properties of Hydrophilic Fibrous Membranes Using Hydrophobic Fibrous Cover Layers

“…The above results were obtained based on the PAN fibrous membranes with a thickness of 80.17 ± 5.91 µm. We also tested the wicking height of PAN membranes with other thickness conditions (e.g., 35.75 ± 1.71 mm and 161.00 ± 8.86 mm from electrospinning times 0.5 and 2.0 h). In these cases, the PVDF-HFP layers had the same thickness conditions.…”

“…Since Wang et al [26] from Lin's group reported a single-layer DWT woven fabric in 2010, considerable research has been devoted to DWT fabrics. [27,28] Two main methods have been developed to prepare DWT fabrics, 1) creating a hydrophobic-to-hydrophilic gradient across the thickness of the fabric, e.g., dip-coating plus UV irradiation, [26][27][28] and 2) forming a hydrophobic layer on a hydrophilic fabric or membrane, e.g., single-side chemical vapor deposition, [29] singleside polymerization, [30] layer-by-layer electrospinning, [20,[31][32][33][34][35] and one-side electrospraying. [18,36,37] Apart from fabrics and nanofiber membranes, copper mesh, [38] copper foam, [39] nickel foam, [40] and wood [41] have been used as a substrate to obtain DWT property based on wetting gradient.…”

Bacteriophage nanofiber fabrication using near field electrospinning

“…Our approaches to fabricate phage nano- and microfibers without any function inhibitors such as polymers and cross-linkers will be very useful to create many phage-based materials and applications. Furthermore, through genetic modification of functional peptides on the M13 phage and writing desired patterns, the phage NFES would be very useful to design chemical sensor, 1,5,26,51 tissue regenerative medicine, 21,22,24,47–52 energy generation, harvesting, 2,27–30 metal reduction and metal nanowires, 53 and water purification 54 in the future.…”

Flexible, portable and heatable non-woven fabric with directional moisture transport functions and ultra-fast evaporation

“…When the droplets are placed on the hydrophobic side, they are subjected to two opposite forces, hydrophobic force (HF) and hydrostatic pressure (HP), and retain a steady-state (Wenzel-Cassie state). 37,38 Subsequently, this steady state is broken, and the droplets begin to move to the opposite side, owing to the action of the horizontal capillary force (CP) generated by HNW-Ag. Finally, the droplets further accelerate in the positive direction through the functional NW under the synergistic action of HP and CP.…”

“…Initially, we assumed that the droplets move in a positive direction from the PVDF coating side (hydrophobic side) to the HNW-Ag (hydrophilic side), while the opposite direction is negative. When the droplets are placed on the hydrophobic side, they are subjected to two opposite forces, hydrophobic force (HF) and hydrostatic pressure (HP), and retain a steady-state (Wenzel-Cassie state) 37,38. Subsequently, this steady state is broken, and the droplets begin to move to the opposite side, owing to the action of the horizontal…”