The rapid development of E-Skin has attracted researchers’
attention to portable wearable devices. However, it is a great challenge
to achieve high-output performance and high-environmental protection
simultaneously. Polyhydroxybutyrate (PHB) has excellent electron-withdrawing
ability and biodegradability, but its stretching ability is poor,
which limits its application in portable wearable devices. In this
paper, the biocompatible poly(lactide-co-caprolactone)
(PLCL) was innovatively selected to modify the properties of the PHB
electrospun membranes, and PHB/PLCL composite membranes with different
contents of PLCL were constructed. Then, the expanded polytetrafluoroethylene
(ePTFE) membranes and PHB/PLCL electrospun membranes were used as
the friction layers to construct a flexible triboelectric nanogenerator
(TENG). With the increase of PLCL contents, the elastic recovery rate
of the composite membranes increased to 68% of tension at 40% strain.
The toughness of the composite membrane was increased by 546%, which
exhibits ultratoughness and stretchable properties. Based on the ultratoughness
and high elasticity electrospun membranes with 50% PLCL, a stretchable
and large deformation sensing device was made. The PHB/PLCL-ePTFE
TENG could distinguish pingpong and badminton accurately, as well
as their various postures such as forehand, backhand, smash poses,
etc., which provided a new idea for large deformation monitoring of
TENGs.
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