超疏水性聚甲的表面启动的聚合
Juan C Tuberquia1, Nabijan Nizamidin, Robert R Harl
1Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA.
Journal of the American Chemical Society
|April 3, 2010
概括
我们开发了一种新的表面启动聚合方法,以制造超疏水性聚甲薄膜. 这些先进的材料具有异常的抗水性和电性,为材料科学应用开辟了新的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 表面科学是一门学科.
背景情况:
- 在需要排水的应用中,开发超疏水表面至关重要.
- 创建超疏水膜的现有方法可能很慢或缺乏对膜形态的控制.
- 聚甲 (PM) 薄膜为各种材料应用提供了潜力,但需要控制的合成方法.
研究的目的:
- 引入一种新的表面启动聚合策略,用于制造超疏水性聚甲薄膜.
- 描述合成的PM薄膜的形态和超性质.
- 研究这些超疏水膜的电性能和潜在应用.
主要方法:
- 在金和基板上使用乙烯基终端自组装单层的表面启动聚合.
- 连续暴露在 -17°C的和甲溶液中进行聚合.
- 原子力显微镜 (AFM) 和扫描电子显微镜 (SEM) 用于表面形态分析.
- 测量水接触角度以量化疏水性和歇斯底里性.
主要成果:
- 实现了薄膜的快速生长,厚度在2分钟内超过500nm,在24小时内超过3微米.
- 观测到微和纳米尺度的特征,使得空气被捕获成为超性.
- 取得了超过160°的前进水接触角度和较低的hysteresis (2°-40°).
- 超疏水膜表现出高电阻 (>10^10 Ω·cm2) 并表现为完美的电容器.
结论:
- 新的表面启动聚甲化 (SIPM) 方法有效地产生超性颗粒膜.
- 独特的表面形态是观察到的超性和电性质的关键.
- 这些超疏水的PM薄膜对先进的电子和防应用有很大的前景.
相关概念视频
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