提高低界面性涂层的抗/脱冰性能:诱导冰裂产生及其延伸
Senyun Liu1, Lingfeng Zhao2, Bingquan Wu2
1State Key Laboratory of Aerodynamics, Mianyang, Sichuan 621000, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|November 5, 2024
概括
这项研究引入了一种使用多孔聚甲基 (PDMS) 涂层和压电振动的新型脱冰策略. 这种方法通过降低界面性和促进冰的断裂来增强冰的脱落.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 部落学 (tribology) 是一个学科.
背景情况:
- 低的界面性对于有效的大规模脱冰至关重要,因为它促进了冰裂的开始和扩张.
- 当前脱冰方法的挑战包括大型的临界结冰尺寸和不完整的冰层脱落.
- 优化界面力量以增强冰裂,膨胀和脱落是克服低强度材料中抗冰失败的关键.
研究的目的:
- 提出并研究一种脱冰策略,将多孔聚甲基 (PDMS) 涂层与低界面性和压电振动相结合.
- 探索涂层孔隙性,机械性能和脱冰性能之间的关系.
- 为了阐明在修改表面上的冰裂背后的机制.
主要方法:
- 在合金基板上通过固化和相分离制造具有不同孔径的疏水性多孔PDMS涂层.
- 涂料的机械性质的表征,特别是弹性模量,与孔隙性相关.
- 调查切割应力和微裂纹在固体冰界面上的协同效应,以促进冰裂.
主要成果:
- 一系列疏水性多孔PDMS涂层已经成功地准备好.
- 发现涂层的多孔度与弹性模量相反相关,随着多孔度的增加,从1465 kPa下降到509 kPa.
- 在固体冰界面的外平面剪切应力和微裂纹的协同作用被确定为增强冰裂的主要机制.
结论:
- 拟议的脱冰策略通过利用低界面性和压电振动来有效地解决防冰故障.
- 调节涂层孔隙性是调整机械性能和提高除效率的可行方法.
- 通过内在材料特性和外部刺激来理解界面力量,为设计先进的抗结冰材料提供了新的途径.
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