...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>JCT research >The role of organic modification of layered nanosilicates on mechanical and surface properties of organic-inorganic coatings
【24h】

The role of organic modification of layered nanosilicates on mechanical and surface properties of organic-inorganic coatings

机译：层状纳米硅酸盐的有机改性对有机-无机涂层的机械和表面性能的作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of alcohol- and amino-functional compatibilizers in nanocomposites of organic-inorganic (O-I) matrices with layered nanofillers (LN) was studied. The alcohol-functional compatibilizers are shown to have a marked influence on morphology, surface- and mechanical properties of the coatings prepared, in spite of the very small amount of both filler and compatibilizer (together 0.5 wt%). The studied O-I matrices were polyepoxy-functional poly-siloxanes cured with organic diamines. Two commercial clays were used as LN in the concentration of 0.5 wt%: natural montmorillonite (Cloisite Na, abbreviated MNa) and Bentonite for water systems (BW). These clays were compatibilized by three hydroxyl-containing substances: Polyethylene glycol 4000, TWEEN 80, and tris(hydroxymethyl)aminomethane (TRIS). All compatibilizers improve the dispersion of the clay fillers, while TRIS always supports full exfoliation. They also cause an increase in the micror-oughness of the coatings and strongly modify their large-scale surface patterns. Mechanical properties are also strongly affected by the compatibilizers: toughness is increased, sometimes markedly, as well as stress at break. Tensile and shear moduli are reduced by the compatibilizers, while the glass transition temperature is specifically shifted to higher or lower values, sometimes markedly.
机译：研究了醇和氨基官能增容剂对具有层状纳米填料（LN）的有机-无机（O-I）基质纳米复合材料的影响。尽管填充剂和增容剂的量都非常少（合计为0.5 wt％），但醇官能增容剂对制备的涂层的形貌，表面和机械性能有显着影响。所研究的O-1基质是用有机二胺固化的聚环氧官能的聚硅氧烷。两种商业粘土以0.5 wt％的浓度用作LN：天然蒙脱土（Cloisite Na，缩写为MNa）和用于水系统的膨润土（BW）。这些粘土被三种含羟基的物质相容：聚乙二醇4000，TWEEN 80和三（羟甲基）氨基甲烷（TRIS）。所有相容剂均可改善粘土填料的分散性，而TRIS始终支持完全剥离。它们还会导致涂层的微观粗糙度增加，并强烈改变其大规模的表面图案。增容剂也会极大地影响机械性能：韧性（有时会显着提高）以及断裂应力会增加。增容剂降低了拉伸模量和剪切模量，而玻璃化转变温度则特别地移至更高或更低的值，有时会明显升高。

著录项

  • 来源
    《JCT research》 |2011年第3期|p.311-328|共18页
  • 作者

    Milena Spirkova; Petr Duchek; Adam Strachota; Rafal Poreba; Jin Kotek; Josef Baldrian; Miroslav Slouf;

  • 作者单位

    Nanostructured Polymers and Composites Department,Institute of Macromolecular Chemistry AS CR, v. v. I.,Heyrovsky Sq. 2, 162 06 Prague, Czech Republic;

    Faculty of Mechanical Engineering, University of West Bohemia, Univerzitni 22, 306 14 Plzen, Czech Republic;

    Nanostructured Polymers and Composites Department,Institute of Macromolecular Chemistry AS CR, v. v. I.,Heyrovsky Sq. 2, 162 06 Prague, Czech Republic;

    Nanostructured Polymers and Composites Department,Institute of Macromolecular Chemistry AS CR, v. v. I.,Heyrovsky Sq. 2, 162 06 Prague, Czech Republic;

    Nanostructured Polymers and Composites Department,Institute of Macromolecular Chemistry AS CR, v. v. I.,Heyrovsky Sq. 2, 162 06 Prague, Czech Republic;

    Institute of Macromolecular Chemistry AS CR, v. v. I.,Heyrovsky Sq. 2, 162 06 Prague, Czech Republic;

    Institute of Macromolecular Chemistry AS CR, v. v. I.,Heyrovsky Sq. 2, 162 06 Prague, Czech Republic;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    organic-inorganic nanocomposite; coating; sol-gel process; montmorillonite; bentonite;

    机译：有机-无机纳米复合材料;涂层;溶胶-凝胶法蒙脱石膨润土;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号