Fig. 2: Preparation and characterization of the bioadhesive, multi-functional BEWI.
From: A skin-interfaced three-dimensional closed-loop sensing and therapeutic electronic wound bandage
a Schematic illustration of the fabrication process of the BEWI. b XRD patterns of the electrospun SEBS, GelMA, SEBS/GelMA and BEWI films. c Conductivities of BEWIs with different ratios of SEBS and GelMA (w/w) (n = 3 independent replicates, one-way two-sided analysis of variance test, NS denotes not significant, mean value ± SD). d Stress-strain curves of different electrospun films. e Mass loss of the electrospun SEBS, GelMA, SEBS/GelMA and BEWI films after incubation in PBS containing collagenase (3 μ/mL) for 14 days (n = 3 independent replicates, mean value ± SD). f Water vapor transmission rate and (g) water sorption of different electrospun films (n = 3 independent replicates, mean value ± SD). Schematics and optical images and of the (h) lap shear and (i) peel-off tests. Comparison of (j) shear strength and (k) peel-off strength between BEWI and commercial fibrin glue (n = 3 independent replicates, Two-sided Student’s t test, *P  <  0.05, mean value ± SD). l Schematic illustration showing the mechanism of tissue adhesiveness of BEWI. SEBS mentioned in this work represents the hydrophilic SEBS/F127.
