• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Crosslinked reduced graphene oxide/polymer composites via in situ synthesis by semicontinuous emulsion polymerization
【24h】

Crosslinked reduced graphene oxide/polymer composites via in situ synthesis by semicontinuous emulsion polymerization

机译：通过半连续乳液聚合原位合成通过交联的石墨烯氧化物/聚合物复合材料

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

This work presents the in situ synthesis of crosslinked polymer/graphene nanocomposites by seeded semicontinuous emulsion polymerization. The OH functionalities on the rGO platelets and in the polymer chains (introduced by the functional monomer hydroxylethyl methacrylate) were used as reactive sites, linked by the presence of NCO terminated polyurethane prepolymer (PU). The reaction was performed in semicontinous mode, using rGO and PU dispersed in water as a seed, whereas the monomers preemulsion was fed slowly. The hybrid latexes were kinetically stable enough to produce composite films by water evaporation, in which rGO platelets were uniformly dispersed and incorporated in a permanent way in the polymer matrix. The composites have a highly crosslinked structure, the degree of which depends on the loading of rGO and PU e.g., NCO/OH ratio. The electrical conductivity of the composites depends highly on the degree of crosslinking and the morphology, thus aligned platelets parallel to the top film surface are the most prospective morphology for the electrical conductivity. Determination of viscoelastic properties has shown that the composites are stiffer and contain smaller amounts of the mobile neat polymer phase with increasing content of rGO, which agrees well with an increase in their crosslinking.
机译：该工作呈现出通过种子半连续乳液聚合的交联聚合物/石墨烯纳米复合材料的原位合成。 rgo血小板和聚合物链中的OH功能（由官能团羟乙基甲基丙烯酸甲酯引入）用作反应性位点，通过NCO封端的聚氨酯预聚物（PU）连接。使用RGO和PU分散在水中以半圆弧模式进行反应，而单体预乳液缓慢喂养。杂交胶乳在动力学上足够稳定以通过水蒸发生产复合膜，其中RGO血小板均匀地分散并以聚合物基质的永久方式掺入。复合材料具有高度交联的结构，其程度取决于RGO和PU的负载，例如，NCO / OH比。复合材料的导电率在高度上依赖于交联程度和形态，从而平行于顶部膜表面的对齐血小板是电导率最佳的形态。粘弹性特性的测定表明，复合材料是富有的并且含有较少量的移动整洁聚合物相，RGO的含量增加，这与其交联的增加均匀。

著录项

  • 来源
    《RSC Advances》 |2015年第21期|共8页
  • 作者

    Spasevska D.; Leal G. P.; Fernandez M.; Gilev J. Blazevska; Paulis M.; Tomovska R.;

  • 作者单位

    Univ St Cyril &

    Methudius Fac Technol &

    Met Skopje 1000 Macedonia;

    Univ Basque Country UPV EHU Fac Ciencias Quim POLYMAT Donostia San Sebastian 20018 Spain;

    Univ Basque Country UPV EHU Fac Ciencias Quim POLYMAT Donostia San Sebastian 20018 Spain;

    Univ St Cyril &

    Methudius Fac Technol &

    Met Skopje 1000 Macedonia;

    Univ Basque Country UPV EHU Fac Ciencias Quim POLYMAT Donostia San Sebastian 20018 Spain;

    Univ Basque Country UPV EHU Fac Ciencias Quim POLYMAT Donostia San Sebastian 20018 Spain;

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

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