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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=687147
• 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.**

超级非润湿表面被认为是各种应用的最佳表面，如淋浴墙、挡风玻璃、涡轮机叶片等。虽然在该领域的研究兴趣很大，但对任何流体都不润湿的表面（超全憎）在工业应用中仍然很大程度上受到追捧，这可以由两个原因解释：（1）所提出的许多制造技术不适合于大面积应用，需要多个昂贵的制造步骤或基于容易损坏并需要重新施加的对环境有害的涂层;（2）许多提出的表面在理想的实验室条件下表现为非润湿性，但在真实的应用中失败。* 我的研究计划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，即飞秒激光微加工，我认为这是一种可行的方法来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开发和推广飞秒激光微加工，以在日常材料上制造具有定义润湿性的纹理表面，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，目前的研究计划的目标是建立稳定性标准和指导方针，通过表征润湿动力学和激光创建的表面上的部分渗透来设计superomniphobic表面纹理。两种新的方法将被应用：共聚焦显微镜通过液体浸没透镜和液滴的影响与液体足迹分析。由于激光加工表面在几个长度尺度上表现出粗糙度，因此将在当前单一粗糙度特征之外取得进展。为了实现这一目标，将首先解决具体目标，例如（1）阐明金属和聚合物上激光诱导表面纹理的形成机制，以及（2）控制激光加工后导致润湿变化的反应机制。在这个发现补助金资助的研究项目的背景下，3博士，3工程硕士和5名本科生将接受培训，并在化学工程，光子学应用和润湿物理学研究的前沿学习宝贵的技能。所有的HQP将接触到跨学科的研究环境，通过与其他地方和区域研究小组现有的高水平的互动保证。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提供一个很好的工具包，以在学术界或工业界取得成功的职业生涯。