Mechanically robust and conductive poly(acrylamide) nanocomposite hydrogel by the synergistic effect of vinyl hybrid silica nanoparticle and polypyrrole for human motion sensing

Collagen-Based Organohydrogel Strain Sensor with Self-Healing and Adhesive Properties for Detecting Human Motion

“…Recently, flexible conductive sensors were increasingly investigated owing to their tremendous applied value in human–computer interaction, − electronic skin, − soft robots, , and health monitoring. − Conductive hydrogels, as a kind of conductive soft materials, have attracted much research interest due to their excellent flexibility, conductivity, lightweight, and other attractive characteristics. − The ideal conductive hydrogel-based flexible sensor is expected to possess multi-environmental applicability; thus, it can be applied in different real environments, such as warm, cold, and even underwater conditions. However, most of the current reports have mainly focused on the anti-freezing performance of conductive hydrogels.…”

Magnetic Core@Shell Fe3O4@Polypyrrole@Sodium Dodecyl Sulfate Composite for Enhanced Selective Removal of Dyestuffs and Heavy Metal Ions from Complex Wastewater

“…In addition, of particular attention is that the magnetism stemming from Fe 3 O 4 microspheres can ensure the rapid separation of the adsorbent from the solution. − However, the lack of specific interactions between Fe 3 O 4 microspheres and the adsorbates often leads to inferior adsorption performances. , Therefore, the combination of Fe 3 O 4 microspheres and conducting polymers − having abundant functional groups is considered to overcome this shortcoming. Polypyrrole (PPy) has many advantages due to its good electrical conductivity, redox properties, environmental stability, and low price, and, notably, the presence of positively charged nitrogen atoms that can adsorb dyestuffs and reduce heavy metal ions. − For instance, Liu et al fabricated a Fe 3 O 4 @PPy composite and tested trace vitamin D 3 in aquatic products by extraction-high performance liquid chromatography and achieved remarkable results. Ali et al prepared a Fe 3 O 4 /PPy/C composite, which possessed excellent adsorption properties for methylene blue (MB) and Congo red (CR).…”

Preparation and properties of polyacrylamide/cellulose nanocrystal/reduced graphene oxide interpenetrating network composite hydrogels

“…Flexible sensors can monitor human health by converting various external stimuli into electrical signals, which provides a good monitoring method for active human health monitoring. [6][7][8][9][10][11][12][13][14] This requires the sensor to fit closely with the skin surface to achieve the accurate measurement of human health parameters, so it needs to have certain flexibility. Among the commonly used flexible sensors, 15 hydrogels have become important because of their good flexibility, 16 high strength, 5,17 viscoelasticity, 18 and biocompatibility.…”