• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Tunable superoleophobicity via harnessing the surface chemistry of UV responsive titania coatings
【24h】

Tunable superoleophobicity via harnessing the surface chemistry of UV responsive titania coatings

机译：通过利用紫外线响应性二氧化钛涂层的表面化学可调谐超级化学性

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

Superoleophobic surfaces exhibiting tunable wettability are prepared by the combination of simple spray coating of Ultra Violet (UV) responsive titania nanoparticles and a low surface energy coating of a self-assembled monolayer (SAM) of 1H,1H,2H,2H-perflurodecyltrichlorosilane (PFDTS). Spray coating creates random micron-sized roughness with reentrant geometry, a necessary requirement for the superoleophobic surface, and a porous network at the nanometer size level, confirmed by the field emission scanning electron microscope (FE-SEM) images. By employing the rough surface and a low surface energy monolayer, the substrates possess superhydrophobicity with a water ( = 72 mN m(-1)) contact angle of 163 degrees and superoleophobicity with a decane ( = 23 mN m(-1)) contact angle of 144 degrees. Wettability of these surfaces is completely reversed to the superoleophilic state upon 6 h of UV irradiation. A quantitative X-ray photoelectron spectroscopy (XPS) analysis has confirmed the mechanism of decomposition of PFDTS molecules on the superoleophilic surfaces via interaction with the defect Ti3+ states of titania upon UV exposure. Furthermore, the superoleophobicity is restored to complete the transition cycle by changing the surface chemistry of the UV exposed surface via annealing and regrafting of the PFDTS monolayer.
机译：表现出可调谐润湿性的超级表面通过简单的超紫（UV）响应性二氧化钛纳米粒子和1H，1H，2H，2H-穿刺亚氯氧烷（PFDTS ）。喷涂产生随机微米尺寸的粗糙度，具有重圈几何形状，对高脂表面的必要要求，并通过现场发射扫描电子显微镜（FE-SEM）图像确认的纳米尺寸水平的多孔网络。通过采用粗糙表面和低表面能单层，基板具有与水（= 72mN mn（-1））接触角为163度和癸烷（= 23mN m（-1））接触的超细纤维角度为144度。在紫外线照射的6小时后，这些表面的润湿性完全逆转到超级辐射状态。定量X射线光电子能谱（XPS）分析证实了通过与UV暴露的缺陷Ti3 +状态的相互作用来证实了PFDTS分子在高脂表面上的分解机制。此外，通过通过退火和重新切换PFDTS单层改变UV暴露表面的表面化学来恢复超细性以完成过渡周期。

著录项

  • 来源
    《RSC Advances》 |2018年第24期|共6页
  • 作者

    Barman Jitesh; Majumder Sumit Kumar; Roy Pritam Kumar; Khare Krishnacharya;

  • 作者单位

    South China Normal Univ Elect Paper Display Inst Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Indian Inst Technol Kanpur Dept Phys Kanpur 208016 Uttar Pradesh India;

    Indian Inst Technol Kanpur Dept Phys Kanpur 208016 Uttar Pradesh India;

    Indian Inst Technol Kanpur Dept Phys Kanpur 208016 Uttar Pradesh India;

  • 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