Ultra-sensitive and flexible electronic skin from nanocellulose/AgNWs hydrogel films with highly transparent, antibacterial and electromagnetic shielding properties

With the rapid development of the electronic information industry, more attention has been paid to the application of flexible wearable electronic devices in the fields of health care, human-computer interaction and artificial intelligence. However, the development of the electronic information industry inevitably brings electromagnetic radiation pollution, and electronic skin (E-skin) with electromagnetic interference shielding effectiveness (EMI SE) can provide extra protection. Here, we used 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) oxidized cellulose nanofibers (TOCN) and silver nanowires (AgNWs) to form TOCN/AgNWs/TOCN/AgNWs multilayer composite hydrogel film for preparing the flexible E-skin. The prepared E-skin exhibited ultra-high sensitivity (5.1 kPa −1 ), extremely fast response time (≤10 ms), excellent stability (>12000 cycles), high antibacterial rate (≥99.99%) and low detecting limit (0.48 Pa). The E-skin achieved a high EMI SE of 20 dB with a transmittance of 86.7%. These excellent properties of the flexible E−skin make it have great application potential in the future. • 2,2,6,6-tetramethylpiperidinyl-1-oxyl oxidized cellulose nanofibers and AgNWs to form TOCN/AgNWs composite hydrogel film. • The E-skin exhibited ultra-high sensitivity (5.1 kPa −1 ), fast response time (≤10 ms), excellent stability (>12000 cycles). • The E-skin achieved high EMI SE of 20 dB, low detecting limit, high antibacterial rate (≥99.99%) and transmittance of 86.7%.