2026-06-18T03:36:07Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/50932021-11-10T09:38:17Zcom_10259_5377com_10259_5086com_10259_2604com_10259_4363com_10259_4313col_10259_5378col_10259_4364col_10259_4314

00925njm 22002777a 4500 dc Pascual Portal, Blanca Sol author Trigo López, Miriam author Reglero Ruiz, José A. author Pablos, Jesús Luis author Bertolín Burillo, Juan Carlos author Represa Pérez, César author Cuevas Vicario, José Vicente author García García, Félix Clemente author García Pérez, José Miguel author 2019-07 We prepared microporous aramid films through a simple, inexpensive and green way, using ionic liquids (IL) as porosity promoters. Commercial poly(m-phenylene isophthalamide) (MPIA) films with different IL proportions were prepared, and then microporous films were obtained by removing the IL in distilled water. Microporous films presented density values between 0.34 and 0.71 g⋅cm−3 (around five times lower to commercial MPIA), with a homogeneous and controlled cellular morphology dependent on the proportion of the IL, showing cell sizes in the microcellular range (radii between 1 and 8 µm). Thermal, mechanical and electrical properties (specifically ionic conductivity) of the aramid films were analyzed to evaluate the influence of the IL proportion. Finally, it was observed that the MPIA/IL system presented a reversible thermally induced phase-separation process around 60 °C, which was characterized through AFM-Raman images and spectra, together with the variation of the ionic conductivity. 0014-3057 http://hdl.handle.net/10259/5093 10.1016/j.eurpolymj.2019.03.058 Ionic liquid Aramid Porous film Thermally-induced phase separation Porous aromatic polyamides the easy and green way