4. Conclusions
This work uses layers of self-assembly (based on hydrogen bonding) to prepare stretchable gas barrier films. The combination of a high stretch ratio is the most distinct feature in this work compared with other inorganic platelet-reinforced polymers as gas barrier films. The LDH nanosheets as well as the hydrogen bonding network in this work induce a long diffusion length, thus suppressing the oxygen permeability. Based on the extensibility of hydrogen bond, the composite film has good oxygen resistance after large-deformation and repeated stretching, and has strong competitiveness in terms of stretching ability and gas barrier performance. The assembly strategy based on hydrogen bonding could be expanded in the construction of barrier materials used in flexible electronics, sensors and packing of devices.
Supporting Information Available:DipCoater image, Schematic diagram of tensile film of tensile testing machine and OTR measurement. This material is available free of charge via the Internet at XXX.
Acknowledgements. This work was supported by the National Natural Science Foundation of China (21671015, 21521005) and the Fundamental Research Funds for the Central Universities (XK1802-6, BHYC1702B, and XK1803-05).