Conductive Liquid Bandage Based on Nitrocellulose and Ag Particles for Wound Isolation and Evaluation

Inspired by the commercial liquid bandage for first-aid treatment of wounds, we proposed a kind of Ag-particle-doped liquid bandage (AgP@LB), which can directly form a conductive layer on a wound for simultaneous isolation and evaluation. Ag particles were doped into collodion solution to realize high conductivity and antibacterial property. Compared to the planner electrode used for wound evaluation, the AgP@LB enables more stable and accurate impedance measurement owing to conformal and flexible contact with skin and wound. To demonstrate this feature, we introduced LCR digital bridge to extract electrical parameters from healthy and injured tissue through skin in order to evaluate the wound state. Our preliminary experimental result indicated significant impedance difference between the wounded skin and healthy one.