Anisotropic Triboelectric Nanogenerators Based On Ordered Electrospinning And Their Applications

The structure of the fiber plays a decisive role in the performance of the fiber.Oriented nanofibers with unique advantages in mechanics,electricity,optics,etc.have good development prospects in the research fields of biology,medicine,and optoelectronics.Electrospinning technology has the advantages of good air permeability,high specific surface area,material diversity,large porosity,etc.,and has broad application prospects in electronic technology,green environmental protection,new energy,catalysis and other fields.As a new type of energy collection and conversion device,the nanogenerator obtained by electrospinning technology can convert various energy collected in daily life environment into electric energy,showing strong flexibility,and can provide small independent systems.power.This thesis mainly introduces the anisotropic triboelectric nanogenerator based on ordered electrospinning and its application research.Firstly,the anisotropic triboelectric nanogenerator is introduced.The traditional triboelectric nanogenerator(TENG)is isotropic in electrical and mechanical properties and does not change with the change of the relative friction Angle of the triboelectric layer.We get organized by high-speed roller adopt electrostatic spinning technology of polymer nanofibers,with anisotropic TENG(A-TENG),it is better than the disorderly electrospinning TENG higher mechanical strength,and with the change of the relative direction friction layer,the output signal changes,can be used for the power supply of Angle sensor.The act of forging banknotes,products and documents not only infringes upon the interests of the original authors,but also circumvents supervision.Effective anticounterfeiting measures are urgently needed to stop this phenomenon.By their very nature,anti-counterfeiting technologies are hard to copy and easy to authenticate.In this work,using the anisotropic output characteristics of A-TENG,considering that the fiber membrane along the two directions has the same appearance but the output is anisotropic,we use A-TENG for anti-counterfeiting,and determine the true information conveyed by the output signal.At the same time,A-TENG can also be combined with binary coding for information encryption transmission,greatly increase the difficulty of forgery.The act of forging banknotes,products and documents not only infringes upon the interests of the original authors,but also circumvents supervision.Effective anticounterfeiting measures are urgently needed to stop this phenomenon.By their very nature,anti-counterfeiting technologies are hard to copy and easy to authenticate.In this work,using the anisotropic output characteristics of A-TENG,considering that the fiber membrane along the two directions has the same appearance but the output is anisotropic,we use A-TENG for anti-counterfeiting,and determine the true information conveyed by the output signal.At the same time,A-TENG can also be combined with binary coding for information encryption transmission,greatly improving the difficulty of anti-counterfeiting.TENG has been widely studied because of its small size,low cost,low frequency and high efficiency,and various working modes.However,in non-operating conditions,the friction layer of the TENG may be accidentally rubbed,and the high voltage generated by the accumulation of charges on the surface may pose a risk of electrostatic discharge(ESD)to the nearby circuit.In order to solve this problem,we changed the structure of the friction substrate and designed A concave A-TENG,which improved the A-TENG anisotropy.By adjusting the effective contact area of the friction layer,the difference between the longitudinal output voltage and the transverse output voltage reached an order of magnitude.When not in use,the nanogenerator can be rotated 90° to avoid static charge build-up and circuit burnout without adding additional components.