THESIS
2020
xvii, 106 pages : illustrations ; 30 cm
Abstract
Robust ultrathin porous polymer films would be gradually regarded as the enabler of next
generation technologies, including flexible sensors, artificial skins, separators, antireflection
and self-cleaning films. Nevertheless, both the creation and the application of these films have
been extremely challenging owing to the insufficient mechanical strength of all reported
ultrathin films. The fabrication of a new ultra-strong and highly flexible ultrahigh molecular
weight polyethylene (UHMWPE) porous membrane is reported in this thesis. Both SEM and
TEM evaluations of film morphology revealed a 2D Delaunay fibrous structure with randomly
triangulated pores. Moreover, the tensile property of this film was at least twice as strong as
that of solid stainless steel, with a measured in...[
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Robust ultrathin porous polymer films would be gradually regarded as the enabler of next
generation technologies, including flexible sensors, artificial skins, separators, antireflection
and self-cleaning films. Nevertheless, both the creation and the application of these films have
been extremely challenging owing to the insufficient mechanical strength of all reported
ultrathin films. The fabrication of a new ultra-strong and highly flexible ultrahigh molecular
weight polyethylene (UHMWPE) porous membrane is reported in this thesis. Both SEM and
TEM evaluations of film morphology revealed a 2D Delaunay fibrous structure with randomly
triangulated pores. Moreover, the tensile property of this film was at least twice as strong as
that of solid stainless steel, with a measured in-plane tensile strength and ductility approximate
to 1400 MPa and 50%, respectively. Its top surface was further aligned a monolayer graphene
to be invented as a fully conformable piezoresistive skin sensor and a nano-vibrational
diaphragm of clarity electrostatic speaker. In addition, other applications such as skin
conformable sweat sensors, antibacterial films, turing pattern structures based on this
nanomembrane were also elucidated in this thesis.
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