Fabrication and characterization of Polyvinylidene fluoride and Myristic acid-Tetradecanol eutectic composite Nanofibers by electrospinning

摘要

In this work, the composite nanofibers with energy storage potential were fabricated by means of electrospinning, with the polyvinylidene fluoride (PVDF) as filament-material. The phase change eutectic mixture of myristic acid (MA) and tetradecanol (TD) were used as energy storage material to make the composite nanofibers. The composite nanofibers of PVDF/MA-TD were characterized using scanning electronic microscope (SEM), Fourier transformation infrared spectroscope (FTIR), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA) and mechanical testing machine. The results demonstrated that the eutectic mixture of MA-TD, with the mass ratio of TD/MA at 7:3, present the melting point of 37.8 degrees C and latent heat of 155.2 J/g, respectively. Furthermore, there was not any chemical reaction between PVDF and the eutectic mixture of MA-TD, because of the high chemical stability of PVDF. The melt point of composite nanofibers of PVDF/MA-TD was higher than that of pure MA-TD eutectic mixture. The DSC results indicated that the electrospun PVDF/MA-TD composite nanofibers with various MA-TD loadings had suitable phase transition temperatures with the latent heat ranging from about 6 to 77 J/g. Moreover, the considerable thermal energy storage capacity, good thermal stability and mechanical properties made the PVDF/MA-TD composite nanofibers to be the potential materials in the applications of energy storage and thermo-regulating textiles.