Laser-assisted fabrication and stability of superomniphobic surfaces

超全疏表面的激光辅助制造和稳定性

• 批准号: RGPIN-2016-04641
• 负责人: Kietzig, AnneMarie
• 金额: $ 2.77万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=747151
• 关键词: Laser; assisted; fabrication; stability; superomniphobic

Super non-wetting surfaces are considered the optimal surface for applications as varied as shower walls, windshields, turbine blades, etc. While research interest in this field is huge, surfaces that behave non-wetting to any fluid (superomniphobic) are still largely sought after in industrial applications, which can be explained by two reasons: (1) many of the presented fabrication techniques are not suitable for large area applications, require multiple expensive fabrication steps or are based on environmentally harmful coatings, which are readily damaged and require reapplication; (2) many of the presented surfaces behave non-wetting under ideal laboratory conditions, but fail in real applications. My research program spans and combines two research fields, one being femtosecond laser-matter interactions, namely fs laser micromachining, which I consider a viable method to create large-scale industrial surfaces with non-wetting behavior, and the other being the interaction of liquids with solids, namely wetting research. The long term goal of my research is to further develop and promote femtosecond laser micromachining to fabricate textured surfaces with defined wettability on everyday materials to provide a viable method for large scale industrial applications. Building upon our background in the field the objective of the current research program is to establish stability criteria and guidelines to design superomniphobic surface textures through characterization of wetting dynamics and partial penetration on laser-created surfaces. Two novel methods will be applied: confocal microscopy through a liquid immersion lens and drop impact with liquid footprint analysis. As laser-machined surfaces exhibit roughness on several length scales, progress will be made beyond the current single roughness features. To achieve this objective, specific targets will be addressed first, such as (1) the elucidation of the formation mechanisms of laser-induced surface texture on metals and polymers and (2) controlling the reaction mechanism causing wetting changes after laser machining.In the context of this Discovery grant funded research program 3 PhD, 3 MEng and 5 undergraduate students will be trained and learn invaluable skills at the forefront of research in chemical engineering, photonics applications and wetting physics. All HQP will be exposed to an interdisciplinary research environment guaranteed through the existing high level of interaction with other local and regional research groups. Over the course of their studies they will be exposed to peer-learning and instruction, which will further develop/enhance their communication and collaboration skills. The combination of the technical and soft skills acquired during their studies will provide them with an excellent toolkit to a successful career in academia or industry.

超级不湿润表面被认为是各种应用的最佳表面，如淋浴墙，挡风玻璃，涡轮叶片等。虽然这一领域的研究兴趣很大，但工业应用中仍然大量寻求对任何流体都不润湿的表面（超疏水性），这可以用两个原因来解释：(1)许多现有的制造技术不适合大面积应用，需要多个昂贵的制造步骤，或者基于对环境有害的涂层，这些涂层很容易损坏，需要重新应用；(2)许多表面在理想的实验室条件下表现为不润湿，但在实际应用中失败。我的研究项目跨越并结合了两个研究领域，一个是飞秒激光与物质的相互作用，即激光微加工，我认为这是一种可行的方法，以创建具有非润湿行为的大规模工业表面，另一个是液体与固体的相互作用，即润湿研究。我研究的长期目标是进一步发展和推广飞秒激光微加工，以在日常材料上制造具有确定润湿性的纹理表面，为大规模工业应用提供可行的方法。基于我们在该领域的背景，当前研究计划的目标是建立稳定性标准和指导方针，通过表征湿润动力学和激光创建表面的部分渗透来设计超疏水性表面纹理。两种新方法将被应用：通过液体浸没透镜的共聚焦显微镜和液滴冲击与液体足迹分析。由于激光加工表面在几个长度尺度上表现出粗糙度，因此将取得超越当前单一粗糙度特征的进展。为了实现这一目标，将首先解决具体的目标，如：(1)阐明激光诱导金属和聚合物表面织构的形成机制；(2)控制激光加工后引起润湿变化的反应机制。在这项发现基金资助的研究计划的背景下，3名博士，3名b孟和5名本科生将在化学工程，光子学应用和润湿物理研究的前沿接受培训并学习宝贵的技能。所有HQP都将接触到一个跨学科的研究环境，通过与其他地方和区域研究小组的现有高水平互动来保证。在他们的学习过程中，他们将接触到同行学习和指导，这将进一步发展/提高他们的沟通和协作技能。在学习期间获得的技术和软技能的结合将为他们在学术界或工业界的成功职业生涯提供一个很好的工具包。