使用一步式方法制备稳定的超疏水型砂表面
Yutong Han1,2, Jue Liu1,2, Xiaojing Xia1,2
1Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha 410004, PR China.
Langmuir : the ACS journal of surfaces and colloids
|November 11, 2023
概括
研究人员使用氧化 (ZnO),酸和环氧树脂为混凝土开发了一种耐用的超性涂层. 这种一步骤的方法增强了混凝土的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 土木工程 土木工程是指土木工程.
背景情况:
- 像混凝土这样的水泥材料自然是多孔的和水友性的,导致损坏.
- 对于超疏水表面的现有方法通常涉及复杂的准备,缺乏稳定性.
- 开发强大的超性涂层对于保护混凝土结构至关重要.
研究的目的:
- 创建一种简单有效的单步方法,用于在砂表面制备超性涂层.
- 为了研究开发的超性涂层的微观结构,特性和稳定性.
- 评估超性涂层在排水,防污染和耐用性方面的性能.
主要方法:
- 采用了一步式方法,使用用氧化物 (ZnO) 纳米颗粒修改了酸和环氧树脂.
- 系统地研究涂层的微观结构,物理/化学特性,疏水特性和稳定性.
- 通过磨砂纸磨损,皮带和高温耐受性测试来评估耐用性.
- 模拟分子动力学以确定水集群扩散系数.
主要成果:
- 超疏水涂层实现了164.2°的最大水接触角和4.6°的滑动角.
- 与普通砂相比,涂层砂的吸水率下降了大约61%.
- 涂层表现出对颗粒物和液体污染物的耐受性.
- 在磨损,带剥离和高温测试后观察到出色的物理耐用性.
- 分子动力学模拟显示,与普通涂层 (0.1645 × 10-4 cm2 / s) 相比,修改表面的水集群扩散系数显著较低 (0.0328 × 10-4 cm2 / s).
结论:
- 一步制备方法有效地在砂上产生了稳定且耐用的超性涂层.
- 开发的超性涂层显著提高了混凝土对吸水和污染的抵抗力.
- 这种先进的涂层为改善混凝土结构的寿命和性能提供了有希望的解决方案.
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