Synthesis of Water Resistance and Moisture-Permeable Nanofiber Using Sodium Alginate–Functionalized Waterborne Polyurethane

Abstract

The development of nontoxic and biodegradable alginate-based materials has been a continual goal in biological applications. However, their hydrophilic nature and lack of spinnability impart water instability and poor mechanical strength to the nanofiber. To overcome these limitations, sodium alginate (SA) and waterborne polyurethane (WPU) were blended and crosslinked with calcium chloride; 30 wt % of SA exhibited good compatibility. Further addition of 10 wt % calcium chloride improved the water stability to an extremely humid region. Furthermore, the stress–strain curve revealed that the initial modulus and the elongation strength of the WPU/SA and WPU/CA blends increased with SA content, and the crosslinker concentration clearly indicated the dressing material hardness resulted from this simple blend strategy. The WPU/SA30 electrospun nanofibrous blend contained porous membranes; it exhibited good mechanical strength with water-stable, water-absorbable (37.5 wt %), and moisture-permeable (25.1 g/m2–24 h) characteristics, suggesting our cost-effective material could function as an effective wound dressing material.

Preparation and Properties of Self-Healing Waterborne Polyurethane Based on Dynamic Disulfide Bond

“…The bands at 2940 and 2856 cm −1 are associated with the C–H asymmetry and symmetric stretching vibration of methylene in polyurethane molecular chain [ 20 , 21 ]. The band at 1110 cm −1 corresponds to bending vibration of C−O (aliphatic ether) in polyether polyol [ 22 ]. The characteristic band about 1707 and 1631 cm −1 is related with nonhydrogen bond C=O hydrogen bond C=O in urea, respectively [ 23 , 24 , 25 ].…”

Recent Progress in Conducting Polymer Composite/Nanofiber-Based Strain and Pressure Sensors

“…Electrospinning polymer solution's viscosity, concentration, conductivity, molecular weight, dispersion, solubility, flow rate greatly influencing the formation of continuous fibers [29,206]. The obtained fibrous structure can be scalable and have a facile control with a wide range from the nanometer to micrometer scale [207,208].…”

Thermoplastic Starch with Poly(butylene adipate-co-terephthalate) Blends Foamed by Supercritical Carbon Dioxide

“…Furthermore, their collection and storage for recycling is an undesirable and time-consuming process [ 10 ]. A viable strategy is to develop bio-based polymer materials as alternatives to these materials to minimize the use of non-biodegradable polymers [ 11 , 12 , 13 , 14 , 15 ]. Considering these, the key to biodegradable polymer-based foams can be used in a wide range of applications, owing to their biocompatibility [ 16 , 17 ], biodegradability, and renewability process [ 18 ].…”