Conductive ultra-soft hydrogel-based wearable sensors, despite featuring multifunctional adaptability, still face inherent mechanical weaknesses and inadequate directional stress discernment. To address this challenge, we herein rationally designed a helical twisted alginate/agar/carbon nanotube triple-network composite gel fiber through a low-temperature-assisted wet-spinning technique coupled with cation crosslinking. The resulting gel fibers exhibit exceptional mechanoelectrical synergy, achieving conductivity up to 3.8 S/m while sustaining thousandfold self-weight loads via synergistic polymer entanglement and coordination interactions. The implemented helical architecture demonstrates enhanced strain responsivity (56%-130%, gauge factor), rapid response kinetics (< 0.5 s), and rate-agnostic stability in twisted fibers, enabling 360° spatiotemporal perception through three orthogonally coupled mechanisms: torsion-activated interfacial contact expansion, spiral topology-optimized charge transfer, and stress-dissipative dynamic microcavity formation based on the one-dimensional intrinsic uniaxial deformation amplification of gel fibers under multi-directional stresses. Practical validations include four-phase table tennis swing biomechanics analysis, proof-of-concept for handwriting training and motion correction systems, and motion-encoded encrypted communications, establishing a fundamental mechanistic framework for directional angle sensing with applications in assessment of adolescents’ daily activities. Ultimately, this breakthrough stems from the harmonization of helix-driven anisotropic sensitivity and triple-network viscoelastic dissipation, effectively resolving the longstanding compromise between directional acuity and mechanical durability in hydrogel-based sensors.

Herein, this study reports the development of a multifunctional conductive antibacterial cotton fabric through the utilization of the natural polyphenol-mediated silver mirror reaction. The experimental results demonstrate that polyphenols can effectively facilitate the deposition of silver nanoparticles (AgNPs), resulting in a uniform and durable hybrid nanocoating on the cotton fabric. The effects of polyphenol’s molecular weights on the coating structures and stabilities have been revealed via two distinct approaches: washing resistance and electrochemical testing systems. It has been concluded that lower-molecular-weight phenols induce a compact and dense coating structure, whereas polyphenols such as tannic acid exhibit relatively high stability, achieving an excellent conductivity of 0.2 S/cm and a good washing resistance of 67% over five cycles. The underlying mechanism has been further confirmed by the cyclic voltammetry measurements, suggesting that polyphenols play a significant role in stabilizing AgNPs and preventing their dissolution. Furthermore, the Ag-doped polyphenol-coated fabrics exhibit notable antibacterial properties. By coupling natural polyphenols with typical silver mirror reactions, this study not only offers a sustainable alternative to synthetic chemicals but also presents a promising method to endow cotton textiles with the dual properties of conductivity and antibacterial activity.