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October 2019

CBE Seminar: “Toward Platinum-free Fuel Cells for Affordable Zero-emission Vehicles”

October 23 at 3:00 PM - 4:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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Abstract: One of the grand challenges facing humanity today is the development of an alternative energy system that is safe, clean, and sustainable. A Distributed Renewable Electrochemical Energy and Mobility System (DREEMS) can meet this challenge. At the foundation of this new energy system, we have chosen to study fuel cells, electrolyzers, and flow batteries. For all these devices polymer electrolytes play a critical role in controlling their performance, cost, and durability, and thus their economic viability. In this presentation,…

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CBE Seminar: “Chemical Reactor Scale-Up: Principles and Practice at Dow”

October 30 at 3:00 PM - 4:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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Abstract: Since Dow first formed a global reaction engineering discipline over twenty years ago, we have accumulated much experience leading and supporting a diversity of reaction engineering projects for our corporation. This presentation will provide specific examples of real-world reaction engineering problems at Dow in the past 27 years and summarize our perspective regarding the key tools and methods of the well-equipped industrial reaction engineering laboratory. Several brief anecdotal descriptions of past process development and reactor scale-up projects will highlight…

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November 2019

CBE Seminar: “Tailoring Processes and Assembly of Nanomaterials for Electrochemical Energy Storage”

November 6 at 3:00 PM - 4:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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Abstract: Despite their promise to mitigate many problems and offer new opportunities in energy storage systems, nanomaterials have proven to be difficult to tailor and preserve their assembly throughout manufacturing processes when a scale-up is considered. My group has been working on understanding and modification of instability-driven processes to devise scalable manufacturing processes such as gas-assisted electrospinning and air-controlled electrospray, which can also provide the tailored assembly of nanomaterials. I will show several examples of using these processes to assemble…

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MEAM Seminar: “Origami Micro, Bio, and Nanosystems “

November 19 at 10:30 AM - 12:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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Due to the inherent planarity of conventional micro and nanofabrication, it is challenging to pattern and assemble micro, bio, and nano-materials and devices in all three dimensions. Origami inspired mechanical assembly by curving, bending, and folding of appropriately designed micro and nanopatterned precursors provides a high-throughput solution to address this challenge. In this talk, I will discuss how the engineering of thin film differential-stress, capillary forces, and swelling can be used to mechanically shape materials and devices in 3D. I…

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CBE Seminar: “Soft, Wet, and Sticky: Viscous Forces and Elasticity in Wet Adhesion”

November 20 at 3:00 PM - 4:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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Abstract: Understanding and harnessing the coupling between lubrication pressure, elasticity, and surface interactions provides materials design strategies for applications such as adhesives, coatings, microsensors, and biomaterials. This presentation will discuss our efforts to understand how soft materials make contact and adhere under dynamic conditions in fluid environments. Measurements of interactions between soft surfaces will show how elastic films deform due to viscous forces and influence adhesion. In particular, we will discuss conditions under which elasticity favors both dynamic and static adhesion…

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CBE Dissertation Defense: “Fabrication of Superhydrolic Nanostructured Membranes for Oil/Water Separation

November 25 at 3:00 PM - 5:00 PM
LRSM REading Room 106/107

Committee: Daeyeon Lee, PhD and Shu Yang, PhD, Co-Advisors; Kathleen Stebe, PhD and Amish Patel, PhD

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