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oai:uvadoc.uva.es:10324/258802025-02-19T12:57:15Zcom_10324_31661com_10324_952com_10324_894com_10324_1158com_10324_931col_10324_31662col_10324_1242

00925njm 22002777a 4500 dc Pinto Sanz, Javier author Morselli, Davide author Bernardo García, Victoria author Notario Collado, Belén author Fragouli, Despina author Rodríguez Pérez, Miguel Ángel author Athanassiou, Athanassia author 2017 Polymer foams with controlled and templated pore size have been obtained for the first time by CO2 gas dissolution foaming from poly(methyl methacrylate) (PMMA) films. This kind of materials, with a variable porous structure, mimic some high-performance natural materials and could present significant interest in many applications. However, up to now their controlled fabrication has not been successfully achieved. Herein, we present a method to achieve a fine control in the production of such materials. Thermal in situ synthesis of ZnO nanoparticles from Zn(OAc)2 was proposed to obtain PMMA nanocomposites, in which the ZnO nanoparticles induce heterogeneous nucleation that leads to formation of pores with size below the micron, upon CO2 foaming. Starting from templated solid PMMA samples with well-differentiated regions, presenting or not ZnO nanoparticles, it was possible to obtain PMMA-based foams with well-defined areas of different pore sizes. Polymer 124 (2017) 176-185 http://uvadoc.uva.es/handle/10324/25880 Nanoporous PMMA foams with templated pore size obtained by localized in situ synthesis of nanoparticles and CO2 foaming