RT info:eu-repo/semantics/article
T1 Evaluation of Imidazolium Ionenes: Solid–Solid Phase Change Materials as Heat Sinks
A1 Arriaza Echanes, Carolina
A1 Krüger, Gabriel I.
A1 Comesaña Gandara, Bibiana
A1 Terraza, Claudio A.
A1 Sanhueza, Loreto
A1 Ortiz, Pablo A.
K1 Materiales de Cambio de Fase
K1 Generación y disipación de calor en ingeniería eléctrica
K1 Polímeros de compuestos nitrogenados
K1 Cambios de estado de la materia
K1 Polielectrolitos
K1 Iones
K1 Disipador térmico
K1 SS-PCM
K1 3312 Tecnología de Materiales
K1 2213 Termodinámica
K1 3307 Tecnología Electrónica
AB Overheating in miniaturized electronic devices can reduce their useful life, where conventional heat sinks are insufficient. The utilization of ionenes as solid–solid phase change materials is proposed to enhance thermal dissipation without the risk of leakage. In this work, a series of imidazolium ionenes with structural modifications in their aromatic core and aliphatic chain length were synthesized. The synthesis was carried out using the respective monomers diimidazole and alkyl dibromide, followed by counterion bromide exchange using lithium bis(trifluoromethanesulfonyl)imide, with yields over 90% in all cases. Thermal characterizations showed that all ionenes are heat-resistant, with degradation temperatures between 421 °C and 432 °C; moreover, they all presented only a solid–solid transition (Tg) as a phase change, between 59 °C and 28 °C, which varied depending on the aromatic core used and the length of the aliphatic chain. The obtained ionenes were introduced into an experimental device with an operating temperature of 40 °C, to be evaluated as solid–solid phase change materials in heat sinks. These demonstrated an average decrease in operating temperature of 9 °C compared to the device without ionenes. On the other hand, the stability of the ionenes was analyzed over 10 thermal cycles at 40 °C at a heating rate of 5 °C/min. This analysis demonstrated that the ionenes did not present changes or degradation during the evaluated cycles. These findings demonstrate that imidazolium ionenes are promising solid–solid phase change materials for use as efficient and self-repairing heat sinks in compact electronic devices.
PB Royal Society of Chemistry
SN 2073-4360
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/82694
UL https://uvadoc.uva.es/handle/10324/82694
LA eng
NO Polymers, 2025, vol. 17, n. 13, 1782.
NO Producción Científica
DS UVaDOC
RD 04-mar-2026