Banca de DEFESA: LUCAS LOPES MENDES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCAS LOPES MENDES
DATE: 03/09/2025
TIME: 14:00
LOCAL: Online
TITLE:

EFFICIENCY COMPARISON BETWEEN SILICONE COATINGS FOR LED MODULAR BOARDS WITH UV AND RTV CURING

KEY WORDS:

Conformal coating, UV curing, PCB, LED, Silicone.

PAGES: 70
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Polímeros
SUMMARY:

Currently, most electronic devices used in daily life contain printed circuit boards (PCIs), composed of conductive tracks and metallic areas for component mounting. When these boards incorporate light-emitting diodes (LEDs), they are applied in signaling systems for urban mobility and are commonly referred to as electronic panels. To ensure their durability in harsh environments, a protective coating known as conformal coating is applied, which safeguards components against weathering, mechanical stress, electrical discharges, thermal stress, and corrosion. This study evaluated the comparative performance of two silicone conformal coatings with distinct curing processes: an RTV system (room-temperature vulcanization, accelerated by convection oven) and a UV-cured system. A distinguishing feature of this research is the use of real operating boards, providing greater representativeness compared to studies based solely on laboratory samples. The analyses included hydrophobicity, adhesion, chemical resistance, corrosion, and UV degradation tests, using techniques such as Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), contact angle measurement, adhesion testing, accelerated aging, and salt spray exposure. FTIR analysis enabled the identification of functional groups in the formulations, while TGA highlighted the thermal stability of each coating. Combined, these methods provided an in-depth understanding of the chemical and physical behavior of the materials, allowing their properties to be correlated with performance under simulated real-world conditions. The results revealed distinct behaviors between the coatings, emphasizing that the selection of the most suitable system must account for specific operating conditions, as each material responds differently to humidity, temperature, and contaminant exposure.

COMMITTEE MEMBERS:
Presidente - DOUGLAS ALEXANDRE SIMON
Interno - EDSON LUIZ FRANCISQUETTI
Interna - DAIANE ROMANZINI
Externo à Instituição - DOUGLAS GAMBA