Alternative processing routes for electroactive functional polymers
Chemical physicist Achidi Frick investigated a new type of 3D printing to make smart plastics work better and faster.
Frick’s rese
arch focused on creating "smart" plastic films using a material calle
d PVDF-TrFE. These plastics are piezoelectric, meaning they turn phys
ical pressure into electricity and vibrate when they receive an elect
rical signal. Currently, making these films is slow and complicated,
often requiring researchers to stretch the plastic or zap it with hig
h voltage. These old methods struggle to create complex 3D shapes and
cannot compete with common materials that contain toxic lead.
Frick investigated whether a new type of 3D printing could make thes
e smart plastics work better and faster, and which specific products
would benefit most. He was motivated to 3D print these materials in h
igh detail without the usual extra steps. This breakthrough could lea
d to safe medical sensors for the body, flexible chargers that harves
t energy from movement, and soft robots that can "feel" what they tou
ch.
Wearable and biomedical devices
The wor
k demonstrates a fast, single-step route to 3D print piezoelectric PV
DF-TrFE films with high performance at very low active-material conte
nt, which can directly benefit engineers developing flexible pressure
sensors, micro-actuators, and energy harvesters where conventional b
rittle ceramics are impractical or toxic. These results are par
ticularly relevant for wearable and biomedical devices, soft robotics
, and embedded sensing in miniaturized components, where mechanically
compliant, biocompatible, and microstructured architectures are cruc
ial. In the near term, DWVML-printed films could be prototyped
into self-powered wearable health monitors or implantable pressure se
nsors that conform to tissue. On a longer timescale, the FeRAM-
focused part of the thesis informs designers of flexible memory and n
euromorphic systems, where PVDF-based ferroelectrics may enable low-p
ower, non-silicon, thin-film memory in emerging electronics tied to t
he Internet of Things and smart medical devices.
The research c ombined experimental fabrication, advanced characterization, and crit ical literature review. First, photoactive PVDF-TrFE-based resins wer e formulated and processed into thin films using different photochemi cal routes, including a rapid volumetric 3D-printing method. These fi lms were then characterized in the laboratory with techniques such as atomic force-based piezoresponse microscopy, Raman spectroscopy, X-r ay diffraction and electron microscopy to link processing conditions, microstructure, and piezoelectric performance. In parallel, an exten sive literature review on ferroelectric polymers and computer memory concepts was carried out to place the PVDF family in the context of e xisting and emerging memory technologies, including FeRAM and neuromo rphic systems. This combination of lab experiments and synthesis of p ublished work made it possible to both demonstrate a practical proof- of-concept for 3D-printed piezoelectric films and evaluate the broade r potential and limitations of PVDF-based materials in future electro nic devices.
More information on the thesis
DESCRIPTION: Chemical physicist Achidi Frick investigated a ne w type of 3D printing to make smart plastics work better and faster.< /strong> Frick’s research focused on creating "smart" plastic films using a material called PVDF-TrFE. These plastics are piezoelectric, meaning they turn physical pressure into electricity and vibrate whe n they receive an electrical signal. Currently, making these films is slow and complicated, often requiring researchers to stretch the pla stic or zap it with high voltage. These old methods struggle to creat e complex 3D shapes and cannot compete with common materials that con tain toxic lead.