• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Intercalation behavior and orientation structure of graphene oxide/polyethylene glycol hybrid material
【24h】

Intercalation behavior and orientation structure of graphene oxide/polyethylene glycol hybrid material

机译：氧化石墨烯/聚乙二醇杂化材料的插层行为和取向结构

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

A series of graphene oxide/polyethylene glycol (GO/PEG) hybrid materials with different PEG molecular weights and contents were prepared, and the intercalation behavior and orientation structure were studied. It was found that compared with the XRD pattern of GO, the diffraction peaks of the GO/PEG hybrids shifted to lower angles due to the existence of PEG. With the increase of the molecular weight of PEG, the interlayer spacing of the hybrids first increased, reaching the maximum for the GO/PEG20 000 hybrid, and then decreased. A similar variation trend can be observed for the hybrids with different PEG-20 000 contents, and the interlayer spacing and intercalation ratio reached the maximum for GO/80 PEG-20 000 sample. Remarkable red-shift of the O-H stretching vibration suggested the existence of hydrogen bonding interactions between the PEG-20 000 molecules and GO layers, leading to the enhancement of the thermal stability of GO. The intercalated PEG-20 000 molecules took a trans conformation and adopted an orderly structure of a monolayer arrangement as zigzag chains in the confined GO layers, while the skeletal structure of GO can be kept in the hybrids after intercalation. AFM and TEM analysis showed that the edges of GO/PEG-20 000 hybrids wrinkled more seriously than that of GO, and the maximum increased interlayer spacing (Delta d) was approximately 0.4-0.5 nm, which agreed well with the XRD result.
机译：制备了一系列不同PEG分子量和含量的氧化石墨烯/聚乙二醇（GO / PEG）杂化材料，研究了其插层行为和取向结构。发现与GO的XRD图谱相比，由于PEG的存在，GO / PEG杂化物的衍射峰移动到较低的角度。随着PEG分子量的增加，杂种的层间间距首先增加，达到GO / PEG20000杂种的最大值，然后减小。对于具有不同PEG-20 000含量的杂种，可以观察到类似的变化趋势，并且GO / 80 PEG-20 000样品的层间间距和插层比达到最大值。 O-H拉伸振动的显着红移表明PEG-20 000分子与GO层之间存在氢键相互作用，从而提高了GO的热稳定性。插入的PEG-20 000分子呈反式构象，并在受限的GO层中采用单层结构作为之字形链，而GO的骨架结构可以在插入后保留在杂种中。原子力显微镜和透射电镜分析表明，GO / PEG-20 000杂种的边缘比GO的褶皱更严重，最大层间间距（Δd）约为0.4-0.5 nm，这与XRD结果非常吻合。

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