Electrospun PVDF and copolymer nanofibers for flexible, low-voltage electrocaloric cooling

Objective

Develop and optimize nanosized PVDF and copolymer fibers obtained by electrospinning for flexible electrocaloric cooling applications.

Optimize electrospinning parameters (voltage, flow rate, distance, humidity, collector) to maximize electrocaloric response of PVDF and derivates.

Carry out structural (FTIR, XRD), morphological (SEM/AFM), electrical and electrocaloric characterization.

Model the electrothermal behavior of membranes and correlate it with fiber microstructure.

Integrate the fibers into flexible microcooler prototypes and evaluate their performance in real-world applications (electronic chips, portable thermal patches).

Characterization Methods

• FTIR, XRD.
• SEM, AFM
• Electrical and thermal conductivities (σ, κ)
• Electrocaloric characterization.

Innovation & Impact

• Contribution to the development of polymer-based solid-state refrigeration technologies.
• Lightweight, flexible materials that can be processed using scalable techniques.

A sustainable, refrigerant-free alternative to gas compression.

Master’s degree in Physics, Chemistry, nanoscience and nanotechnology, Electronics/IT Engineering (or similar);

Scientific ambition and enthusiasm, research-oriented attitude, capable of taking initiatives and with a solid problem-solving attitude; Ability to work in an interdisciplinary team, w/ good spoken and written English.

MicroEnergy Sources and Sensor Integration Group (MESSI): MESSI develops micro‑energy and smart sensing devices to tackle long‑term challenges like “Healthier Citizens” and “Net Zero Human Impact.” The group explores environmental energy harvesting (thermoelectricity) and energy generation/storage using micro‑fuel cells and biodegradable batteries, along with advanced sensor systems. A key focus is micro‑integrating energy sources and sensors into autonomous, self‑powered platforms by leveraging standard silicon technologies, rapid prototyping, and additive manufacturing.

Thermal Properties of Nanoscale Materials group (GTNaM): Affiliated also with ICN2: studies thermal properties of disordered and nanoscale materials, especially ultrathin films and low‑dimensional solids. They employ nanocalorimetry to investigate phase transitions in ultrathin films and 2D materials, often collaborating on size‑dependent effects. They also research nanoscale heat transport mechanisms involving phonons, electrons and photons to design thermoelectric harvesters and thermal sensors.