Figure 7. SEM images of four kinds of composite films after
stretching. (Green circles mark the aggregation of LDH nanosheets and
orange circles represent the fracture of the film.)
The cyclic stability under tensile condition was further investigated.
Because of the generation of small cracks in 120% deformation, the
repeated tensile test was carried out under 100% deformation. It can be
found that the OTR of (TA@LDH/PEO)50 films does not
change much after stretching (Figure S6, Support Information). With the
increase of the recycle times, the gas blocking performance only slowly
decays, and after 10 recycle times, it decreases by only ∼20%. The
excellent performance after multiple stretching makes the
(TA@LDH/PEO)50 film a promising candidate for
stretchable gas barrier material.