Probing and Modulating Interactions of Drops, Bubbles and Particles with Implications for Chemical Engineering Processes

探测和调节液滴、气泡和颗粒的相互作用对化学工程过程的影响

• 批准号: RGPIN-2020-04196
• 负责人: Zeng, Hongbo
• 金额: $ 6.56万
• 依托单位: University of Alberta
• 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=746895
• 关键词: Probing; Modulating; Interactions; Drops; Bubbles

Canada has a vast wealth of natural resources (e.g., minerals, crude oil, crude bitumen, natural gas), contributing significantly to the national economy. The interactions of liquid drops, gas bubbles and solid particles in complex fluid environment, particularly in the presence interface-active species (e.g., surfactants, polymers, particles), play a critical role in determine the efficiency and performance of numerous engineering processes in natural resources production (e.g., mineral flotation, bitumen extraction, oil/water separation, wastewater treatment). Previous studies have mainly focused on the intermolecular and surface interactions of soft materials and particle systems with "clean" interfaces (without interface-active species) and solid substrates with homogeneous surface chemistry. In practical engineering applications, however, interface-active species are widely present at solid/oil/water/gas interfaces and in bulk fluids, while many solid surfaces show heterogeneity in surface chemistry. Quantifying the interaction forces of these deformable material systems (e.g., drops, bubbles) and solids with surface heterogeneity in the presence of interface-active species is much more challenging, but is of fundamental and practical importance, which will be the main focus of this proposed research. The long-term objective of this proposed program is to elucidate the physicochemical properties and interaction mechanisms of drops, bubbles and particles in the presence of interface-active species (e.g., surfactants, polymers, nanoparticles) at the nano- and micro-scale. The short-term objectives are to (1) quantify the intermolecular and surface forces and establish the interaction mechanisms, particularly hydrophobic interaction, of liquid drops, gas bubbles and solid particles in aqueous media, by modulating surface chemistry, nanoscale heterogeneity, interfacial molecular mobility and water chemistry, in the presence of interface-active species, and (2) elucidate the interaction mechanisms of liquid drops, gas bubbles and solid particles with slippery surfaces, towards the development of novel slippery surfaces with controlled motion manipulation of drops/bubbles/particles. The proposed research will fill the knowledge gap on the fundamental interaction mechanisms of drops, bubbles and fine solids in the presence of interface-active species, particularly on quantification of their intermolecular and surface forces, the origin of hydrophobic interactions, and how hydrophobic effects and other surface forces contribute to their interaction behaviors (e.g., assembly, aggregation, and coalescence). The proposed research will also provide new insights on how to efficiently and effectively modulate these interactions in related engineering processes and help develop new materials and surfaces towards more efficient industrial processes. The research outcomes will facilitate the sustainable development of natural resources.

加拿大拥有丰富的自然资源（例如矿产，原油，原油，天然气），对国民经济做出了重大贡献。液滴，气泡和固体颗粒在复杂的流体环境中的相互作用，尤其是在存在界面活性物种（例如表面活性剂，聚合物，聚合物，颗粒）中，在确定自然资源生产中众多工程过程的效率和性能方面起着至关重要的作用。先前的研究主要集中于与“清洁”界面（无界面活性物种）和具有均匀表面化学的固体底物的软材料和颗粒系统之间的分子间和表面相互作用。但是，在实用的工程应用中，界面活性物种在固体/油/水/气体界面和散装流体中广泛存在，而许多固体表面在表面化学中显示出异质性。在存在界面活性物种的情况下，量化这些可变形材料系统（例如，滴，气泡）和具有表面异质性的固体的相互作用力是更具挑战性的，但具有基本和实际的重要性，这将是这项拟议研究的主要重点。该提出的程序的长期目标是阐明在纳米和微尺度上界面活性物种（例如，表面活性剂，聚合物，纳米颗粒）存在下滴，气泡和颗粒的物理化学特性和相互作用机制。短期目标是（1）量化分子间和表面力，并建立相互作用机制，尤其是液滴相互作用，液态滴，气泡和水性培养基中的固体颗粒，通过调节表面化学，纳米级异质性，纳米级异质性，互相迁移性和水的液体液体的液体液体，（2气泡和具有滑动表面的固体颗粒，朝着新型滑动表面的发展，并控制了滴剂/气泡/颗粒的运动操纵。拟议的研究将填补在界面活性物种存在下滴，气泡和细固体基本相互作用机制的知识差距，尤其是在定量其分子间和表面力，疏水相互作用的起源以及疏水性和其他表面作用和其他表面作用中对它们的相互作用行为（例如，组合，组合，综合，综合）。拟议的研究还将提供有关如何有效地调节相关工程过程中这些相互作用的新见解，并帮助开发新的材料和表面，以实现更有效的工业流程。研究结果将促进自然资源的可持续发展。