Flexible energy harvester based on aligned PZT/SMPU nanofibers and shape memory effect for curved sensors

Recent developments of hybrid piezo–triboelectric nanogenerators for flexible sensors and energy harvesters

“…Piezoelectric crystals can be conveniently reduced to nanosized fillers that retain the piezoelectricity for the assembly of nanogenerators. Nanofillers include zero-dimensional (0D) materials such as barium titanate (BTO) 8 and potassium sodium niobate (KNN) nanoparticles; 9 one-dimensional (1D) materials such as lead zirconate titanate (PZT) nanofibres, 10 zinc oxide (ZnO) nanorods, gallium nitride (GaN), 11 and indium nitride (InN) nanowires; 12 and two-dimensional (2D) fillers such as tin disulfide (SnS 2 ) 13 and molybdenum disulfide (MoS 2 ) nanosheets. 14 Piezoelectric polymers based on polyvinylidene difluoride (PVDF) and their nanocomposites are also predominately used for developing piezoelectric nanogenerators.…”

Shape memory polyurethane‐based electrospun yarns for thermo‐responsive actuation

“…These onedimensional nanostructures play a crucial role in the design of new functional materials with a wide range of applications. [15][16][17] However, nanofibers often present poor mechanical properties and discontinuous structures.…”

“…Shape memory polyurethane (SMPU) nanofibers, which possess a random structure with high surface area, porosity, and filtration properties, 16,23,24 have been studied for applications in regenerative medicine, filtration, and robotics, taking the advantages of. Therefore, preparing SMPU electrospun yarns that maintain the original network structure of the nanofibers may be an effective approach to improve the spinnability of nanofibers.…”

“…Electrospinning is a simple and low‐consumption method of great importance in the production of nanofibers with diameters that range from the nano‐ to microscale. These one‐dimensional nanostructures play a crucial role in the design of new functional materials with a wide range of applications 15–17 . However, nanofibers often present poor mechanical properties and discontinuous structures.…”

Influence of quadrat characteristics on the evolution of the dispersion effect for fiber–water dispersions

“…Owing to their high aspect ratio, volume and flexibility, low density and abundance of fibers, they are used in a wide range of industrial applications, including composites, 1,2 paper making, 3 health care, 4 battery separators 5 and filtration, 6 and they provide the corresponding structural support, 7 transmission, conductivity 8 and phase separation. 9 Natural and manmade fibers are manipulated by methods such as aligning, the formation of random networks, 10 knitting, 11 braiding, 12 weaving 13 and being applied to three-dimensional structures, 14 and are incorporated into the design of various structures to endow different abilities to the materials. Among these structures, random network structures based on mixed fibers provide high filterability, isotropic mechanical properties 15 and uniform density.…”