Exploring a New Class of PVDF/3-Aminopropyltriethoxysilane (core) and 2,2-Bis(hydroxymethyl)butyric Acid (monomer)-Based Hyperbranched Polyester Hybrid Fibers by Electrospinning Technique for Enhancing Triboelectric Performance

With the rapid advancement in sensor technologies, triboelectric nanogenerators (TENGs) have emerged as a promising sustainable power source for intelligent electronics. Herein, fabricated a novel 3-aminopropyltriethoxysilane (core) and 2,2-bis(hydroxymethyl)butyric acid (monomer)-based hyperbranched polyester by facile single-step polycondensation technique generation 2 (Si-HBP-G2). Further, a new class of polyvinylidene fluoride (PVDF) and different weight percentages (0, 5, 10, 15, and 20 wt%) of Si-HBP-G2 hybrid fiber blends are prepared by traditional electrospinning technique. The as-prepared Si-HBP-G2 and its blends are well characterized using SEM/EDS, FTIR, NMR, and XRD studies. The influence of Si-HBP-G2 content on triboelectric performance in terms of the open circuit potential (V_OC) and short circuit current (I_SC) is evaluated using aluminum (Al) as a counter electrode. Among them, 15 wt% of Si-HBP-G2/PVDF hybrid fiber mat (PG2-15) exhibits superior electrical performance. Which is almost increased 5.9 times (22–130 V) of V_OC and 4.9 times (0.71–3.5 µA) of I_SC than PVDF fiber mate. These results reveal the significance of Si-HBP-G2 in the triboelectric performance. The optimized TENG device (PG2-15/Al-TENG) exhibits a peak power density of 0.2 Wm⁻² at 100 MΩ external load. Finally, the PG2-15/Al-TENG practically demonstrates real-time application energy harvesting applications such as powering 100 LEDs and a stopwatch.