Nanogenerators,as the typical conversion of mechanical energy to electrical energy devices,have great potential in the application of providing sustainable energy sources for powering miniature devices.In this work,ce...Nanogenerators,as the typical conversion of mechanical energy to electrical energy devices,have great potential in the application of providing sustainable energy sources for powering miniature devices.In this work,cellulose acetate/cellulose nanocrystal(CA/CNC)composite nanofiber membranes were prepared by electrospinning method and then utilized to manufacture a flexible pressure-driven nanogenerator.The addition of CNC not only increased the content of piezoelectric cellulose I crystallization but also strengthened the mechanical deformation of the nanofiber membranes,which could greatly enhance the piezoelectric performance of CA/CNC composite membranes.The CA/CNC composite nanofiber membrane with 20%(mass fraction)of CNC(CA/CNC-20%)showed optimal piezoelectric conversion performance with the output voltage of 1.2 V under the force of 5 N(frequency of 2 Hz).Furthermore,the output voltage of the CA/CNC-20%nanogenerator device exhibited a linear relationship with applied impact force,indicating the great potential in pressure sensors.展开更多
A novel poly（ether sulfone） with oligoaniline pendants（PESOP） was prepared by KaCO3-mediated nucleophilic polycondensation and characterized with Fourier-transform infrared spectrometry（FTIR）, 1H nuclear magneti...A novel poly（ether sulfone） with oligoaniline pendants（PESOP） was prepared by KaCO3-mediated nucleophilic polycondensation and characterized with Fourier-transform infrared spectrometry（FTIR）, 1H nuclear magnetic resonance（1H NMR） and gel permeation chromatography（GPC）. The cyclic voltammetry（CV） curve of PESOP reveals the reversible electroactivity. In the electrochromism study, PESOP film exhibited good electroch- romic properties with a high contrast value, moderate switching time and acceptable coloration efficiency. After running 1000 cycles, the PESOP/indium-tin oxide（ITO） electrochromic device remained unchanged except for the drifting of base line, which certified its good electro-photo stability of the fabricated electrochromic device. Moreover, the polarization technique and electrochemical impedance spectroscopy（EIS） were used to study the anticorrosion performance of PESOP coatings on the cold rolled steel（CRS） in a 5%（mass fraction） NaCI solution. All the results indicate that the obtained PESOP is a competitive candidate as anticorrosion material.展开更多
基金supported by the National Natural Science Foundation of China(No.21875084).
文摘Nanogenerators,as the typical conversion of mechanical energy to electrical energy devices,have great potential in the application of providing sustainable energy sources for powering miniature devices.In this work,cellulose acetate/cellulose nanocrystal(CA/CNC)composite nanofiber membranes were prepared by electrospinning method and then utilized to manufacture a flexible pressure-driven nanogenerator.The addition of CNC not only increased the content of piezoelectric cellulose I crystallization but also strengthened the mechanical deformation of the nanofiber membranes,which could greatly enhance the piezoelectric performance of CA/CNC composite membranes.The CA/CNC composite nanofiber membrane with 20%(mass fraction)of CNC(CA/CNC-20%)showed optimal piezoelectric conversion performance with the output voltage of 1.2 V under the force of 5 N(frequency of 2 Hz).Furthermore,the output voltage of the CA/CNC-20%nanogenerator device exhibited a linear relationship with applied impact force,indicating the great potential in pressure sensors.
基金Supported by the National Natural Science Foundation of China（No.21104024）, the Jilin Province Science and Technology Department Project, China（No.20130522139JH）, the Functional Research Funds for the Central Universities, China（No. JCKY-QKJC07） and the Open Project of State Key Laboratory of Superhard Materials（Jilin University）, China（No.201403）.
文摘A novel poly（ether sulfone） with oligoaniline pendants（PESOP） was prepared by KaCO3-mediated nucleophilic polycondensation and characterized with Fourier-transform infrared spectrometry（FTIR）, 1H nuclear magnetic resonance（1H NMR） and gel permeation chromatography（GPC）. The cyclic voltammetry（CV） curve of PESOP reveals the reversible electroactivity. In the electrochromism study, PESOP film exhibited good electroch- romic properties with a high contrast value, moderate switching time and acceptable coloration efficiency. After running 1000 cycles, the PESOP/indium-tin oxide（ITO） electrochromic device remained unchanged except for the drifting of base line, which certified its good electro-photo stability of the fabricated electrochromic device. Moreover, the polarization technique and electrochemical impedance spectroscopy（EIS） were used to study the anticorrosion performance of PESOP coatings on the cold rolled steel（CRS） in a 5%（mass fraction） NaCI solution. All the results indicate that the obtained PESOP is a competitive candidate as anticorrosion material.
