Vol. 13, Issue 3 (2025)

I Hydrogels combined with electrical conductivity and stimulus responsiveness have emerged as a talented material that have the capacity to expand its applications in the field of bioelectronics and robotics. This paper presents a low-energy approach to the formation of the conductive poly acrylamide (PAAm) hydrogels using NO2 as the initiator of the radical polymerization at room temperature without the use of heating and photoactivation. In this process aqueous solution of NO2 creates NO2 radicals which trigger the linking of acrylamide monomers to form poly-acrylamide polymer. N, N-methylene bis acrylamide (BAM) crosslinks the PAAm polymer to form stable network. Now, if Aniline, a conductive filler was added then it creates an efficient charge pathway. And this tailored network design permits the materials conductivity which is responsive to environmental stimuli.

Experimental testing shows that conductivities from 0.1 S/cm to 5 S/cm were achieved by managing filler loadings and applying redox cycles. Studies confirm high strength mechanically and excellent elasticity, making these smart hydrogels a fit material for wearable sensors, drug delivery platforms, and flexible bioelectronic components. The experimental mild conditions and mild initiations of NO? based approach provides a scalable and ecofriendly method for forming such intelligent soft materials explorable to next generation biomedical application.