The main objective of this study was to develop improved functional textiles for marine leisure clothing. Neoprene fabrics we re coated with carbon nanofibers (CNFs)/ Poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) composite solution compris- ing 0�16 wt% CNF in 1�5 wt% PVDF-HFP via electrospinning. Electrospinning was carried out from 15 to 24 kV. Neoprene textiles coated with the CNF/PVDF-HFP composite with various applied voltages were characterized as follows: Morphology was examined using an image analyzer microscope system and a field emission scanning electron microscope (FE-SEM). The thermal storage property of these materials was also analyzed using a ther- mal imaging camera with a forward looking infrared (FLIR) system. The resultant samples that were laminated with a knitted fabric composed of 80% nylon and 20% polyurethane were subjected to a thermal insulation property test. The test and control specimens were irradiated for 60 min. The test specimen and the control specimen were analyzed by con- sidering the differences in temperature between both specimens on heating. Water pene- tration resistance of the laminated knitted fabric with the CNF/PVDF-HFP composite nanoweb-coated neoprene fabric was measured. The water repellent property test was conducted using a drop shape analyzer (DE/DSA 100, Kruse). The results indicated that an increase in the density of nanoweb-coated neoprene fabric surface correlated with improved thermal storage, thermal insulation, water penetration resistance, and water repellent properties. In addition, increasing amounts of CNFs in the CNFs/PVDF-HFP com- posite solution resulted in increased thermal storage, thermal insulation, and water repel- lent properties.

Characterization and Manufacturing of Neoprene Fabrics Coated with CNF/PVDF-HFP Nanoweb

In this study, electrospinning Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) fiber membrane for lithium-ion battery separator was prepared by simultaneous electrospinning and coaxial electrospinning. The membranes were treated using acetone under different temperature and time to increase the strength and stability of membrane. The surface morphology, porosity, electrolyte uptake, heat stability were studied in details. The electrochemical performance of samples was tested as a separator in the lithium-ion battery. The results showed that the composite fiber membrane with sheath/core structure exhibited better performance than that of the membrane prepared by simultaneous electrospinning. The heat shrinkage rate of sheath/core structure fiber membrane was 2.2 % at 150℃, electrolyte uptake was 490 % and the tensile breaking strength was 13.21MPa. The sheath/core structure fiber membrane ionic conductivity at room temperature was 2.87x10-3 S/cm, the electrochemical stability window was 5.3 V, and showed capacity of about 169.5 mAh/g at 0.2 C. After 100 charging and discharging cycling, the specific capacity retention rate of battery was 99 %. The obtained results suggest that PVDF-HFP/PMIA coaxial electrospun membrane can be used as separator for high performance lithium-ion battery.

http://www.dpi-proceedings.com/index.php/dteees/article/download/28493/27597

Enhanced Treatment of Electrospun PVDF-HFP/PMIA Fiber Membrane as Separators for Lithium-Ion Batteries

Characterization of PVdF-HFP Nanofibers by Electrospinning

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Characterization of PVdF-HFP Nanofibers by Electrospinning