Pinto Javier, Barroso-Solares Suset, Magrì Davide, Palazon Francisco, Lauciello Simone, Athanassiou Athanassia, Fragouli Despina
Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, University of Valladolid, 47011 Valladolid, Spain.
Polymers (Basel). 2020 Apr 17;12(4):934. doi: 10.3390/polym12040934.
A versatile and straightforward route to produce polymer foams with functional surface through their decoration with gold and palladium nanoparticles is proposed. Melamine foams, used as polymeric porous substrates, are first covered with a uniform coating of polydimethylsiloxane, thin enough to assure the preservation of their original porous structure. The polydimethylsiloxane layer allows the facile in-situ formation of metallic Au and Pd nanoparticles with sizes of tens of nanometers directly on the surface of the struts of the foam by the direct immersion of the foams into gold or palladium precursor solutions. The effect of the gold and palladium precursor concentration, as well as the reaction time with the foams, to the amount and sizes of the nanoparticles synthesized on the foams, was studied and the ideal conditions for an optimized functionalization were defined. Gold and palladium contents of about 1 wt.% were achieved, while the nanoparticles were proven to be stably adhered to the foam, avoiding potential risks related to their accidental release.
提出了一种通用且直接的方法，通过用金和钯纳米颗粒对聚合物泡沫进行修饰来制备具有功能表面的聚合物泡沫。用作聚合物多孔基材的三聚氰胺泡沫首先覆盖有一层均匀的聚二甲基硅氧烷涂层，该涂层足够薄以确保保留其原始多孔结构。聚二甲基硅氧烷层允许通过将泡沫直接浸入金或钯前驱体溶液中，在泡沫支柱表面直接原位形成尺寸为几十纳米的金属金和钯纳米颗粒。研究了金和钯前驱体浓度以及与泡沫的反应时间对泡沫上合成的纳米颗粒的数量和尺寸的影响，并确定了优化功能化的理想条件。实现了约1 wt.%的金和钯含量，同时证明纳米颗粒稳定地附着在泡沫上，避免了与其意外释放相关的潜在风险。
