Interfacially Driven Self-Assembly in Multiphase Soft Matter Systems : Microstructural Transitions Triggered by Stimuli-Responsive Interfaces

多相软物质系统中的界面驱动自组装：刺激响应界面触发的微观结构转变

• 批准号: 418483-2012
• 负责人: Virgilio, Nick
• 金额: $ 1.82万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573680
• 关键词: Interfacially; Driven; Self; Assembly; Multiphase

Understanding and using the self-assembling and stimuli-responsive properties of multiphase soft matter systems (polymers, emulsions, foams, colloids, etc.) is actually a very active field of research. Triggering stimuli such as temperature, pH, and light can be used to provoke a significant material response: alter the mechanical and rheological properties of materials, recover or liberate a particular chemical compound, for sensing devices and for applications in process engineering such as heterogeneous catalysis. The properties of heterogeneous materials and devices are often related to their interfaces. This research program aims at developing multiphase soft matter materials comprised of stimuli-responsive interfaces. We will: (1) develop methods based on optical tensiometry to measure interfacial tensions in model systems modified with passive and/or stimuli-responsive interfacial modifiers, the equilibrium and dynamic interfacial properties during and after adsorption, and the interfacial viscoelastic properties; (2) develop thermodynamic models predicting the equilibrium microstructures in systems comprised of more than three phases, or heterogeneous systems comprised of interfacial modifiers, and conduct the experiments to verify the predictions; (3) apply the acquired knowledge and know-how to the development of stimuli-responsive multiphase emulsions and foams with triggered microstructural and interfacial transitions for applications in the fields of recovery/delivery of chemicals (such as oil recovery and drug release), and food science. This program will allow the training of highly qualified personnel in the fields of surface and interfacial soft matter science and engineering. It will benefit several active research areas in chemical engineering and materials science: the development of high-performance composite materials, materials for biomedical and tissue engineering, multiphase concentrated systems for heterogeneous catalysis applications, food science, etc. We expect that our work will lead to collaborations with fellow colleagues and industrial partners.

理解和利用多相软物质系统（聚合物、乳液、泡沫、胶体等）的自组装和刺激响应特性实际上是一个非常活跃的研究领域。温度、pH 值和光等触发刺激可用于引发显着的材料响应：改变材料的机械和流变特性，回收或释放特定化合物，用于传感设备和多相催化等过程工程应用。 异质材料和器件的特性通常与其界面有关。该研究计划旨在开发由刺激响应界面组成的多相软物质材料。我们将：（1）开发基于光学张力测定的方法，测量用被动和/或刺激响应界面改性剂改性的模型系统中的界面张力、吸附过程中和吸附后的平衡和动态界面特性以及界面粘弹性特性； (2) 建立热力学模型来预测由三相以上组成的系统或由界面改性剂组成的非均质系统中的平衡微观结构，并进行实验来验证预测； (3) 将所获得的知识和技术应用于开发具有触发微观结构和界面转变的刺激响应多相乳液和泡沫，以应用于化学品回收/输送领域（例如石油回收和药物释放），以及食品科学。 该计划将培训表面和界面软物质科学与工程领域的高素质人才。它将有利于化学工程和材料科学的几个活跃研究领域：高性能复合材料的开发、生物医学和组织工程材料、多相催化应用的多相浓缩系统、食品科学等。我们期望我们的工作将引领与同事和工业伙伴的合作。