Proton‐exchange membrane (PEM) is a core component of fuel cells that provides a channel for proton migration and transport. Prevailing PEMs fabricated using well‐established casting techniques have several limitations such as low proton conductivity, high fuel permeability, and poor stability. To overcome these shortcomings, this article introduces a graphene oxide (GO)‐based nanohybrid Nafion nanofiber membrane prepared using a facile electrospinning technique. On the one hand, electrospinning nanofibers provide efficient transport paths for protons, which tremendously enhance the proton conductivity. On the other hand, GO doping in PEM improves the self‐humidification, stabilities (mechanical, thermal, and chemical), and proton conductivity and reduces the fuel permeability. In this research, nanofiber membranes were obtained from Nafion solutions containing 0, 0.1, and 0.2 wt % GO via electrospinning. The morphology, structure, mechanical properties, proton conductivity, water uptake, and swelling properties of the membranes were studied. The results demonstrated that the comprehensive performance of PEM was significantly improved. The new findings may promote the wide application of PEM fuel cells. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46443.

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Getting finer fibers is one important goal of electrospinning. In this article, we introduce orthogonal experimental research of solution electrospinning with a pulsed electric field. The influences of the voltage, flow rate, frequency, and duty cycle on the mean diameter and diameter distribution of electrospun fibers were investigated. The phenomenon of electrospinning in a pulsed electric field was compared to that of electrospinning in an ordinary electric field. We found that the order of the factors that affected the fiber diameter was Duty cycle > Flow rate > Voltage > Frequency and the order of factors that affected the fiber diameter distribution was Duty cycle > Flow rate > Frequency > Voltage. In addition, compared with the ordinary electric field, the pulsed electric field apparently contributed to reductions in the mean fiber diameter and diameter distribution. In this article, we provide important evidence for the reduction of the fiber diameter with the pulsed electric field. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46130.

Through three-dimensional (3D) printing pen methods on the high-voltage electrostatic field with a needle shaped collector, the refined poly-L-lactide (PLA) finished product has been achieved. Through orthogonal experimental methods, We found that optimal conditions at 180℃, a nozzle-to-needle shaped collector of 7 mm, and applied voltage at 45 kV with narrow variance distribution produce an average silk diameter reaching 517.1±24.9μm. 3D printed in a high voltage electrostatic field fibers are 0.5 times thinner than direct 3D printed fibers. Four polymer patterns have been precisely printed. It can be used to make ordered micron fiber pattern, such as the micro sensor, air ultrafiltration membrane, Proton exchange membrane. In this report, the morphology, structural changes of the fibers are characterized.

The presence of undissolved water in fuel can significantly impact the safety, stability, and durability of engine operation. Karl Fischer titration is a cost-effective and convenient approach to accurately measure the total water content in the fuel. The undissolved water content can be determined by subtracting the saturated dissolved water content from the total water content. This paper outlines a methodology for preparing dissolved water saturated fuel and investigates the effect of temperature and interfacial tension on the saturation solubility of water in 0# diesel fuel and 3# jet fuel. The results show that the saturated dissolved water content of the two fuels is linearly and positively correlated with the temperature; the use of surfactants was shown to decrease interfacial tension, thereby promoting the combination of fuel and water molecules and increasing saturated water solubility; molecular surfactants were more effective at combining fuel and water molecules than ionic surfactants when interfacial tension was held constant.