The microstructure is a critical factor in determining
the macroscopic
properties of aerogel materials and has a significant impact on their
performance in various application scenarios. Here, drawing inspiration
from the microstructure regulation of the bubble template, polyvinylpyrrolidone
(PVP) was used to microscopically regulate graphene oxide nanosheets
in the fabrication of the graphene aerogel (GA). Simultaneously, sodium
dodecyl sulfate (SDS) foaming was employed as the bubble template
to aid in the construction of PVP/SDS-GA (PSGA) with a hierarchical
porous structure. Such an innovative structural blueprint inherently
promotes a more even distribution of stress, thereby enhancing the
compressive strength of the aerogel. The advanced architecture of
PSGA enables rapid desiccation by using ambient pressure and elevated
thermal methods, simplifying the fabrication process. PSGA possesses
several remarkable characteristics: an ultralow density of 2.84 mg/cm3, a high electrical conductivity of 10 S/m, a superelasticity
with an extreme strain of 99%, an outstanding fatigue resistance with
the ability to withstand 10,000 cycles at 70% strain, and a high compressive
strength of 0.66 MPa. In light of these characteristics, the piezoresistive
sensor conceptualized using PSGA as a foundational substrate exhibited
superior signal discernment capabilities