l-Citrulline-Modified Ti₃C₂T_x MXene Nanosheets Embedded in Polyacrylamide/Sodium Alginate Hydrogels for Electromagnetic Interference Shielding

Abstract

In this work, a robust and mechanically composite hydrogel with an efficient electromagnetic interference shielding performance was successfully fabricated via the incorporation of Lcitrulline-modified Ti 3 C 2 T x MXene nanosheets into the polyacrylamide/sodium alginate hydrogels by using ferrous chloride as the adhesive. A L-citrulline-modified Ti 3 C 2 T x MXene nanosheet was the main shielding medium; ferrous chloride could not only enhance the mechanical property of the resultant hydrogels but also slightly improve the EMI shielding efficiency. The optimal tensile strength (3.42 MPa) and the EMI shielding effectiveness (26.8 dB) were achieved for the composite hydrogels with 6.5 wt % L-citrulline-modified Ti 3 C 2 T x MXene nanosheets and 0.6 mol/L ferrous chloride, and the high ductility (780% elongation at break) of the composite hydrogel was reached with 0.5 wt % L-citrullinemodified Ti 3 C 2 T x MXene and 0.8 mol/L ferrous chlorides. With outstanding mechanical and EMI shielding performances, the prepared composite hydrogels could apply in the electronic skin field.

Direct Writing of Silver Nanowire Patterns with Line Width down to 50 μm and Ultrahigh Conductivity

“…Using SA as additives, we developed an aqueous ink with high loading of AgNWs up to 2.0 wt % that can be extruded smoothly through a thin nozzle (inner diameter = 50 μm) without clogging. SA is a low cost, water-soluble natural polysaccharide. − The rheological behavior of the inks modified with three types of SA of varying molecular weights was first investigated. The results depicted in Figure S3 suggest that SA with a moderate apparent viscosity (SA-2) could impart adequate printability to the ink at a relatively low concentration of 0.50 wt %.…”