CAREER: The Stability of Viscoelastic Wormlike Micelle Solutions in Extensional Flows

建议没有。当前位置：主要研究者：JONATHAN ROTHSTEININSTITUTION: UNIVERSITY OF MASSACHUSETTS- AMHERSTCAREER：粘弹性虫状胶束溶液在拉伸流动中的稳定性新兴领域的新技术挑战需要研究和培训活动，创造性地将机械工程问题应用于物理，化学和材料科学的界面。这笔拨款将资助一个实验项目，研究粘弹性虫状胶束溶液在强拉伸流动中的稳定性。在足够高的浓度下，表面活性剂溶液可以自发地自组装形成蠕虫状胶束。像聚合物一样，这些蠕虫状的胶束可以缠绕并赋予流体粘弹性。与聚合物不同，虫状胶束在布朗动态波动下不断断裂和重整。胶束溶液目前被广泛用作消费品的流变改性剂，如油漆、洗涤剂和药品等需要仔细控制流体性质的产品。此外，胶束溶液在广泛的应用中也变得重要，包括农用化学品喷洒、喷墨印刷和提高石油采收率。因此，对这些复杂流体在不同流动状态下的行为有一个基本的了解是至关重要的。本研究项目将从实验和理论上研究蠕虫状胶束溶液在强拉伸成分流动中的稳定性。这项研究有潜力产生丰富的新的和迷人的基础科学，以及巨大的商业和工业利用和成功的适用性。教育计划包括有针对性的活动，旨在促进主动学习技术和新评估技术的实施和评估，实施活动的重点是扩大本科生的研究机会，以及一个面向K-12学生的推广计划，旨在通过使用互动流体力学演示和高速摄影向他们展示科学中的美，从而激发他们对科学的兴趣。由电子病历学习和教育研究项目共同资助。

PROPOSAL NO.: CTS-0547180PRINCIPAL INVESTIGATORS: JONATHAN ROTHSTEININSTITUTION: UNIVERSITY OF MASSACHUSETTS- AMHERSTCAREER: THE STABILITY OF VISCOELASTIC WORMLIKE MICELLE SOLUTIONS IN EXTENSIONAL FLOWS New technology challenges in emerging areas require research and training activities which creatively apply mechanical engineering problems on the interface of physics, chemistry and material science. This grant will fund an experimental program to investigate the stability of viscoelastic wormlike micelle solutions in strong extensional flows. At sufficiently high concentrations, surfactants solutions can spontaneously self assemble to form wormlike micelles. Like polymers, these wormlike micelles can entangle and impart viscoelasticity to the fluid. Unlike polymers, wormlike micelles are constantly breaking and reforming under Brownian dynamic fluctuations. Micelle solutions are currently being used extensively as rheological modifiers in consumer products such as paints, detergents and pharmaceuticals where careful control of the fluid properties is required. In addition, micelle solutions have also become important in a wide range of applications including agrochemical spraying, inkjet printing and enhanced oil recovery. A fundamental understanding of the behavior of these complex fluids in different flows regimes is therefore of critical importance. This research program will experimentally and theoretically investigate the stability of wormlike micelle solutions in flows with strong extensional components. This research has the potential to generate a wealth of new and fascinating fundamental science as well as applicability for tremendous commercial and industrial utilization and success. The education plan consists of targeted activities designed to promote the implementation and evaluation of active learning techniques and novel assessment techniques, the implementation of activities focused on the expansion of research opportunities for undergraduates and an outreach program to K-12 students designed to spark their interest in science by showing them the beauty within science using interactive fluid mechanics demonstrations and high-speed photography.Co-funded by the EHR Research on Learning and Education Program.