12%acrylamide（AM） was grafted onto the surface of nanocellulose whiskers（NCW）,which was self-assembled to be the chiral nematic suspension at 3%content.The acrylamide grafted NCW（AM-g-NCW） was characterized with...12%acrylamide（AM） was grafted onto the surface of nanocellulose whiskers（NCW）,which was self-assembled to be the chiral nematic suspension at 3%content.The acrylamide grafted NCW（AM-g-NCW） was characterized with Fourier Transform Infrared Spectroscopy（FTIR）.The grafting ratio was measured by elemental analysis.The degrees of crystallinity of the AM-g-NCW were measured by X-ray diffraction（XRD）.The liquid crystalline properties of the AM-g-NCW were investigated by the polarizing optical microscopy（POM）.The AM-g-NCW was found to self-assembly to be a lyotropic state.展开更多
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
基金support received from the National Natural Science Foundation of China(No20646003)Guangdong Province Natural Science Foundation(No07300767)the Fundamental Research Funds for the Central Universities of South China University of Technology(No2009ZM0239)
文摘12%acrylamide（AM） was grafted onto the surface of nanocellulose whiskers（NCW）,which was self-assembled to be the chiral nematic suspension at 3%content.The acrylamide grafted NCW（AM-g-NCW） was characterized with Fourier Transform Infrared Spectroscopy（FTIR）.The grafting ratio was measured by elemental analysis.The degrees of crystallinity of the AM-g-NCW were measured by X-ray diffraction（XRD）.The liquid crystalline properties of the AM-g-NCW were investigated by the polarizing optical microscopy（POM）.The AM-g-NCW was found to self-assembly to be a lyotropic state.
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.
