通过毛细管悬浮中的纳米粒子增强了接触灵活性
Lingyue Liu1, Jens Allard2, Erin Koos1
1KU Leuven, Department of Chemical Engineering, Celestijnenlaan 200J, 3001 Leuven, Belgium.
Journal of colloid and interface science
|March 29, 2024
概括
将纳米颗粒添加到毛细管悬浮液中,可以调整它们的3D打印特性. 这些粒子修改液体桥梁和微粒接触,控制先进材料应用的屈服应力和可压缩性.
科学领域:
- 合体和表面科学科学
- 材料科学 材料科学 材料科学
- 类风病学 类风病学 类风病学
背景情况:
- 毛细管悬浮利用粒子网络进行结构和产量应力,这对于陶和油漆等3D打印应用至关重要.
- 加入一种不可混合的二次流体会在微粒之间形成毛细血管桥梁,从而影响悬浮的特性.
- 调整这些特性对于控制加工和应用过程中的材料行为至关重要.
研究的目的:
- 研究不同疏水性的纳米颗粒如何影响毛细血管桥梁和微粒接触的结构.
- 为了确定这些结构修改对毛细悬浮的调节性屈服应力和剪切模块的影响.
- 评估样品压缩性对纳米粒子添加的敏感性及其对网络结构的影响.
主要方法:
- 使用共聚焦显微镜可视化纳米粒子相对于微粒和毛细血管桥梁的定位.
- 纳米颗粒的疏水性被系统地改变,以观察对网络结构和桥梁形成的影响.
- 在显微镜中,在现场进行了逐步的单轴压缩测试,以监测微粒运动和结构演变.
主要成果:
- 观察到纳米粒子在微粒子表面上诱导薄液体薄膜,减少接触线固定,促进液体交换.
- 接触点上的纳米粒子减少了赫兹接触,促进了微粒的重新排列.
- 这些修改导致了增强的微粒子流动性和毛细血管桥梁大小的较窄分布.
结论:
- 纳米颗粒的添加提供了一种方法来控制和调整毛细管悬浮液的风湿性质.
- 纳米粒子引起的液体薄膜和接触力学变化显著影响网络的稳定性和可变性.
- 这项研究为优化毛细管悬浮的途径提供了一个途径,用于需要精确控制材料性能的先进制造工艺.
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