| 초록 |
A highly conductive and stretchable composite, combined with gas barrier properties, is achieved by depositing trilayers (TL) of polyethylene oxide (PEO), double-walled nanotube (DWNT), stabilized with polyacrylic acid (PAA), and graphene oxide (GO) via the layer-by-layer assembly technique. A 40 TL thin film (~ 900 nm thick), comprised of a PEO/DWNT-PAA/GO sequence, exhibits electrical conductivity of 1.3 S/cm and exceptional oxygen barrier property (200X times improvement in oxygen transmission rate (OTR) relative to polyurethane (PU) rubber), along with high stretchability of 25%. Low temperature thermal reduction of this system further improves the electrical conductivity to 67 S/cm and crack-free surface up to 15% strain with high gas barrier (30 times lower OTR than uncoated polyurethane rubber). Stretching up to 15% reduces electrical properties, only ~ 30% increase in R/R0, and the OTR remains at least 15X lower than the uncoated rubber. |
