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首页> 外文期刊>RSC Advances >Epoxy-silica nanocomposite interphase control using task-specific ionic liquids via hydrolytic and non-hydrolytic sol-gel processes
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Epoxy-silica nanocomposite interphase control using task-specific ionic liquids via hydrolytic and non-hydrolytic sol-gel processes

机译：通过水解和非水解溶胶 - 凝胶方法使用任务特异性离子液体的环氧树脂 - 二氧化硅纳米复合物联络控制

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摘要

Carboxylic-functionalized task-specific imidazolium ionic liquids (carboxylic-ILs) presented selective high reactivities with epoxy-functionalized compounds, even in highly complex epoxy-silica nanocomposite systems. The carboxylic-ILs induced the in situ covalent bonding with epoxy based materials and tuning of the nanocomposites’ filler-matrix interphase when applied either via hydrolytic or non-hydrolytic sol- gel processes. Structural modifications in the carboxylic-ILs allowed fine morphology control and promoted the formation of well dispersed silica nanodomains. This approach resulted in nanocomposites with improved mechanical properties, without a negative effect on the glass transition temperature, for both rubbery and glassy epoxy-silica nanocomposite systems with a very small IL content (～0.2 wt%). The best properties were achieved with the application of IL 1-carboxypropyl-3- methylimidazolium chloride, which produced a toughness increase of more than 7 times for the rubbery and almost twice for the glassy epoxy systems, when compared to their IL-free equivalents. These easy and quick procedures to produce imidazolium functionalized materials have the potential to open up a broad range of new conductive, responsive, smart and tunable reinforced materials.
机译：羧基官能化任务特异性咪唑鎓离子液体（羧基-ILS）呈现出具有环氧官能化化合物的选择性高反应性，即使在高度复杂的环氧树脂 - 二氧化硅纳米复合体系中。羧基-ILS诱导与环氧基材料的原位共价键合，并在通过水解或非水解溶胶方法施用时调整纳米复合材料的填充基质间相互作用。羧基-ILS中的结构修饰允许精细的形态控制并促进良好分散的二氧化硅纳米瘤的形成。该方法导致纳米复合材料具有改善的机械性能，对于具有非常小的IL含量（〜0.2wt％）的橡胶和玻璃状环氧树脂纳米复合体系（〜0.2wt％）而没有对玻璃化转变温度的负面影响。通过施加IL1-羧丙基-3-甲基咪唑鎓氯化物的应用，该氯化物的韧性增加了最佳性能，而橡胶的韧性增加，并且对于其无IL的当量相比，玻璃环氧系统的几乎两次。这些简单快捷的生产咪唑型官能化材料具有潜力，可以开辟广泛的新导电，响应性，智能和可调增强材料。

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  • 来源
    《RSC Advances》 |2015年第111期|共10页
  • 作者

    R. K. Donato; M. Perchacz; S. Ponyrko;

  • 作者单位

    Laboratory of Technological Processes and Catalysis Institute of Chemistry Universidade Federal do Rio Grande do Sul Av. Bento Gon?alves 9500 Porto Alegre RS Brazil.;

    Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic.;

    Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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