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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=708432
• 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.

超非润湿表面被认为是最适合各种应用的表面，如淋浴墙、挡风玻璃、涡轮叶片等。虽然该领域的研究兴趣很大，但在工业应用中，对任何流体都不润湿的表面(超全向疏水)仍然受到很大的追捧，这可由两个原因解释：(1)现有的许多制造技术不适合大面积应用，需要多次昂贵的制造步骤，或者基于对环境有害的涂层，这些涂层很容易损坏，需要重新涂装；(2)在理想的实验室条件下，许多现有的表面表现为非润湿，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，即飞秒激光微加工，我认为这是创造具有非润湿行为的大规模工业表面的可行方法，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，在日常材料上制造具有特定润湿性的纹理表面，为大规模工业应用提供一种可行的方法。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南，以通过表征润湿动力学和激光表面的部分渗透来设计超无所不包的表面纹理。将应用两种新的方法：通过液体浸泡透镜的共焦显微镜和液滴撞击液体足迹分析。由于激光加工表面在多个长度尺度上表现出粗糙度，因此将在目前单一的粗糙度特征之外取得进展。为了实现这一目标，首先将解决特定的目标，如(1)阐明激光诱导金属和聚合物表面织构的形成机理，以及(2)控制激光加工后引起润湿变化的反应机理。 在这一发现基金资助的研究项目的背景下，3名博士、3名孟晚舟和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的前沿研究中学习宝贵的技能。所有HQP将暴露在一个跨学科的研究环境中，通过与其他地方和区域研究小组现有的高水平互动来保证。在他们的学习过程中，他们将接受同行的学习和指导，这将进一步发展/提高他们的沟通和合作技能。在他们学习期间获得的技术技能和软技能的结合，将为他们在学术界或工业界成功的职业生涯提供一个极好的工具包。