Kuśmierek Małgorzata, Szadkowski Bolesław, Marzec Anna
Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.
Materials (Basel). 2020 Sep 29;13(19):4337. doi: 10.3390/ma13194337.
In this paper, we present the design of reinforced silica-filled elastomer composites exhibiting a high transparency, high mechanical performance in static and dynamic conditions, and improved electrical conductivity. Two different imidazolium ionic liquids (ILs) were used with increasing loads: 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIMTFSI) and 1-butyl-3-methylimidazolium tetrachloroaluminate (BMIMAlCl). The composites were prepared in a two-roll mill. The influence of the ILs on the dispersion of the silica in the nitrile rubber (NBR) matrix was assessed by scanning electron microscopy (SEM). The presence of ILs in the NBR/SiO systems improved the crosslink density and ionic conductivity of the composites. Their mechanical properties and aging stability remained almost unchanged, at a very satisfactory level. Greater crosslinking was observed for the NBR/SiO composites containing BMIMAlCl, due to its catalytic effect on the efficiency of interface crosslinking reactions. We found the optimal formulation for obtaining transparent reinforced NBR/SiO composites. The application of 2.5 phr of BMIMAlCl resulted in a high transparency in the case of NBR composites filled with 30 phr of silica.
在本文中，我们展示了一种增强型二氧化硅填充弹性体复合材料的设计，该复合材料具有高透明度、在静态和动态条件下的高机械性能以及改善的导电性。使用了两种不同的咪唑鎓离子液体（ILs），且负载量不断增加：1-丁基-3-甲基咪唑鎓双（三氟甲基磺酰）亚胺（BMIMTFSI）和1-丁基-3-甲基咪唑鎓四氯铝酸盐（BMIMAlCl）。复合材料在双辊炼胶机中制备。通过扫描电子显微镜（SEM）评估了离子液体对二氧化硅在丁腈橡胶（NBR）基体中分散的影响。NBR/SiO体系中离子液体的存在提高了复合材料的交联密度和离子电导率。它们的机械性能和老化稳定性几乎保持不变，处于非常令人满意的水平。由于BMIMAlCl对界面交联反应效率具有催化作用，因此在含BMIMAlCl的NBR/SiO复合材料中观察到了更大程度的交联。我们找到了获得透明增强NBR/SiO复合材料的最佳配方。在填充30 phr二氧化硅的NBR复合材料中，应用2.5 phr的BMIMAlCl可实现高透明度。
