2026-06-05T20:32:59Zhttps://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

Pascual Portal, Blanca Sol Trigo López, Miriam Reglero Ruiz, José A. Pablos, Jesús Luis Bertolín Burillo, Juan Carlos Represa Pérez, César Cuevas Vicario, José Vicente García García, Félix Clemente García Pérez, José Miguel 2019-05-20T10:00:39Z 2019-07 2021-08 0014-3057 http://hdl.handle.net/10259/5093 10.1016/j.eurpolymj.2019.03.058 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. FEDER (Fondo Europeo de Desarrollo Regional) and both the Spanish Agencia Estatal de Investigación (MAT2017-84501-R) and the Consejería de Educación-Junta de Castilla y León (BU306P18) application/pdf eng Elsevier European Polymer Journal. 2019, V. 116, p. 91-98 https://doi.org/10.1016/j.eurpolymj.2019.03.058 info:eu-repo/grantAgreement/MICINN/MAT2017-84501-R info:eu-repo/grantAgreement/JCyL/BU306P18 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Ionic liquid Aramid Porous film Thermally-induced phase separation Ingeniería química Chemical engineering Porous aromatic polyamides the easy and green way info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion