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稳定液体通过纳米颗粒的界面堵塞而陷入不平衡的形状
Mengmeng Cui1, Todd Emrick, Thomas P Russell
1Polymer Science and Engineering Department, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA.
概括
研究人员创造了自组装的纳米粒子表面活性剂,在流体接口上形成类似液体的阵列. 这些纳米颗粒表面活性剂可以被结以稳定液体形状,从而使运输和储存的新应用成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 体科学 体科学 体科学
- 软物质物理学 软物质物理学
背景情况:
- 纳米粒子可以在流体接口上组装,形成无序的,类似液体的阵列.
- 较弱的吸附力通常限制了纳米粒子在接口上的稳定性.
- 在现场生成纳米粒子表面活性剂可以克服这些局限性.
研究的目的:
- 研究纳米粒子表面活性剂在流体界面上的形成和稳定.
- 探索使用外部场来控制纳米粒子稳定液体的形状和稳定性.
- 开发方法来创建坚固的,保持形状的液体系统.
主要方法:
- 在现场使用水中的纳米粒子和油中的聚合物产生纳米颗粒表面活性剂.
- 用外部场变形液体域以改变接口面积.
- 在接口上观察纳米粒子扩散和聚集.
- 使用双功能连接体来交叉链接纳米粒子组件,以提高稳定性.
主要成果:
- 纳米粒子表面活性剂在现场成功生成,在接口上形成类似液体的阵列.
- 外界场诱导的变形导致了纳米粒子吸附的增加,并在场释放时随后的阻塞.
- 堵塞阻止了进一步的形状变化,同时保持了组件的无序,类似液体的性质.
- 与功能失调的配体交叉连接提供了纳米粒子组件的进一步稳定.
结论:
- 这项工作展示了一种使用纳米粒子表面活性剂生成和稳定具有规定的形状的液态域的新方法.
- 阻塞机制允许可逆和可重复的形状控制.
- 开发的技术为反应性液体系统,包装,交付和储存中的先进应用提供了潜力.
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