• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >A reactive core-shell nanoparticle approach to prepare hybrid nanocomposites: effects of processing variables
【24h】

A reactive core-shell nanoparticle approach to prepare hybrid nanocomposites: effects of processing variables

机译：反应性核壳纳米粒子制备混合纳米复合材料的方法：工艺变量的影响

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

Reactive core-shell nanoparticles are prepared in aqueous media by the addition of a solution of an amphiphilic organic polymer and a metal oxide precursor. The nanoparticles are thought to form by nucleation, with a core-shell structure forming later. Using acid catalysis the precursor is converted to metal oxide by an in situ sol-gel reaction. The hybrid nanoparticles, prepared with 10, 15, and 20 wt percent Al(OiPr)_3, are dried and compression moulded, yielding flexible, transparent films (0.5 and 2 mm) that retain a core-shell nanoparticle structure and show well-distributed alumina-rich domains throughout the organic matrix. Preliminary results are given that show relationships between processing variables and film properties (particle diameter, appearance of the core, 7g (glass transition temperature), and storage modulus). The apparent stability of the alumina distribution is also discussed. Nanoparticles prepared using 10 wt percent Al(OiPr)_3 (aluminium isopropoxide) gave films that, depending on the nanoparticles' process conditions, possessed core-shell nanoparticles with a median diameter of 45 + - 2 nm and a Tg that was 27 deg C above the matrix polymer's Tz, or a median nanoparticle diameter of 161 + -30 nm and a Tg that was 17 deg C above the matrix polymer's Tg.
机译：通过添加两亲有机聚合物和金属氧化物前体的溶液，在水性介质中制备反应性核-壳纳米颗粒。认为纳米颗粒通过成核形成，随后形成核-壳结构。使用酸催化，前体通过原位溶胶-凝胶反应转化为金属氧化物。将混合的纳米颗粒（由10％，15％和20％的Al（OiPr）_3制备）干燥并压制成型，从而产生保留芯-壳纳米颗粒结构并显示出良好分布的柔性透明膜（0.5和2 mm）整个有机基质中富含氧化铝的区域。给出的初步结果表明了加工变量与薄膜性能之间的关系（颗粒直径，纤芯外观，7g（玻璃化转变温度）和储能模量）。还讨论了氧化铝分布的表观稳定性。使用10％重量百分比的Al（OiPr）_3（异丙醇铝）制备的纳米颗粒，其薄膜根据纳米颗粒的工艺条件而具有核壳型纳米颗粒，其中值直径为45 +-2 nm，Tg为27摄氏度高于基体聚合物的Tg或中值纳米颗粒直径161 + -30 nm，Tg比基体聚合物的Tg高17摄氏度。

著录项

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