신소재공학과

Regular 6/3 (화) Prof. Alfredo Alexander-Katz (Dept. of MSE, MIT)

2014.06.03 17:02

Administrator Views:3078

행사일  
6월 3일 (화) 개최되는 봄학기 신소재공학과 정기세미나를 아래와 같이 안내해드립니다.


= 아 래 =


1. 일 시 : 2014. 6. 3 (화), 16:00 ~
2. 장 소 : 응용공학동 1층 영상강의실
3. 연 사 : Prof. Alfredo Alexander-Katz (Dept. of MSE, MIT)
4. 제 목 : Blood Clotting-Inspired Polymer Physics
5. 발표내용요약(Abstract)

  Nature has devised creative and efficient ways of solving complex problems, and one of these problems is that of blood clotting in flowing conditions. In fact, nature has used a novel combination of polymer physics and chemistry that enhances the self-healing propensity of a vessel when strong flows are present while avoiding coagulation when the flow is diminished, a rather counter-intuitive phenomenon. Underlying this process is a globular biopolymer, the so-called von Willebrand Factor, whose function is strongly regulated by flow. In this talk I will present our work on this macromolecule starting from the single molecule approach and building up to the multi component system that more closely resembles blood. I will emphasize how new concepts have emerged from trying to understand such a complex system, in particular I will show how these polymers can display giant non-monotonic response to shear, as well as a very large propensity to form polymer-colloid composites in flow while being a stable dispersed suspension in quiescent conditions. In fact, the aggregation behavior is universal and can be explained with simple scaling arguments. These novel concepts and results are in principle not unique to blood clotting and can have important ramifications in other areas.

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