No abstract

No abstract

No abstract

No abstract

The flexible triboelectric nanogenerator (TENG) has promising applications in portable electronic devices and micro wireless sensors. However, complex fabrication processes, high cost, and difficulty in coupling with the human body are still the challenges for the further development of TENG. Herein, a flexible double‐sided patterned titanium nitride/polydimethylsiloxane (DSP‐TiN/PDMS) composite film is prepared by a simple and low‐cost sandpaper template method. The double‐sided microporous structure on the PDMS increases the effective contact area and promotes more charge storage on the PDMS surface, thus improving the output performance of TENG. With the introduction of conductive TiN nanoparticles, the effective thickness of the composite film can be reduced, leading to the increase of the capacitance value of TENG. Therefore, the TENG fabricated under the conditions of optimized filling content and surface patterning microstructure can generate a high open‐circuit voltage of 51.8 V and a short‐circuit current of 36.8 μA, as well as a peak power of 11.25 μW. Furthermore, the proposed TENG can also achieve effective energy harvesting in human motions. This easy‐to‐prepare DSP‐TiN/PDMS composite film opens up a feasible way for the construction of high output performance TENG and presents promising applications in micro wearable devices.

No abstract

3D printing platform to directly form the desired 3D part. [4][5][6][7] Compared with other 3D printing methods, FDM has the advantages of low cost, simple principle, and high reliability. However, the development of the FDM process is limited by the small variety of available filaments, the poor mechanical properties, and the lack of functionality of the printed parts. [8][9][10] Researchers have mostly focused on the study of FDM process parameters to solve the problems such as the poor mechanical properties of the printed parts. [11,12] Korkut et al. [13] studied the influence of FDM printing process parameters, such as line width, layer thickness, and filler orientation, on the tensile strength and quality of samples. Wang et al. [14] studied the effects of printing parameters such as the FDM nozzle temperature, platform temperature, printing speed and layer thickness on mechanical properties such as tensile strength, flexural strength, and impact strength. Cerda-Avila et al. [15] studied the effects of the filler orientation, layer thickness, and filler morphology on Young's modulus and the ultimate tensile stress of materials. Garzon-Hernandez et al. [16] studied the effects of cavity density and filament orientation on the mechanical properties of samples. Wang et al. [17] studied the influence of printing angle, nozzle temperature, and filling rate materials on mechanical properties. Vicente et al. [18] studied the influence of interlayer cooling time, nozzle diameter, layer thickness, and other parameters on the mechanical properties of FDM processing parts.

No abstract