As a representative piezoelectric polymer,poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)has been widely used in sensors transducers and actuators.In this paper,gold nanoparticles(AuNPs)are prepared and dop...As a representative piezoelectric polymer,poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)has been widely used in sensors transducers and actuators.In this paper,gold nanoparticles(AuNPs)are prepared and doped into the PVDF-HFP solution to enhance the piezoelectric property of electrospun PVDF-HFP nanowires.The results indicate that proper amounts of AuNPs within the nanowires can improve the piezoelectric phase in PVDF-HFP.Then,a nanogenerator was prepared using the PVDF-HFP/Au nanowires to verify the increase in piezoelectric performance.Experimental results show that compared with PVDF-HFP n anoge nerator without AuNPs doping,the output voltage is in creased by about two times,while the output current is doubled for the PVDF-HFP/Au nano generator.Furthermore,systematic molecular dyn amics(MD)simulations are conducted to elucidate the physical mechanism of AuNPs enhanced β-phase formation in PVDF-HFP.Our results show that the adsorption and electrostatic interaction between the AuNPs and the PVDF chains promote the electroactive β-phase formation,and also significa ntly in crease the ten sion and poling effect during electrospin ning process,which is the origin of the enhanced elec-troactive phase formation in electrospun PVDF-HFP nanowires.展开更多
基金the National Natural Science Foundation of China(Grant Nos.12075191 and 11972272).
文摘As a representative piezoelectric polymer,poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)has been widely used in sensors transducers and actuators.In this paper,gold nanoparticles(AuNPs)are prepared and doped into the PVDF-HFP solution to enhance the piezoelectric property of electrospun PVDF-HFP nanowires.The results indicate that proper amounts of AuNPs within the nanowires can improve the piezoelectric phase in PVDF-HFP.Then,a nanogenerator was prepared using the PVDF-HFP/Au nanowires to verify the increase in piezoelectric performance.Experimental results show that compared with PVDF-HFP n anoge nerator without AuNPs doping,the output voltage is in creased by about two times,while the output current is doubled for the PVDF-HFP/Au nano generator.Furthermore,systematic molecular dyn amics(MD)simulations are conducted to elucidate the physical mechanism of AuNPs enhanced β-phase formation in PVDF-HFP.Our results show that the adsorption and electrostatic interaction between the AuNPs and the PVDF chains promote the electroactive β-phase formation,and also significa ntly in crease the ten sion and poling effect during electrospin ning process,which is the origin of the enhanced elec-troactive phase formation in electrospun PVDF-HFP nanowires.
