您现在的位置:首页 > 学科建设 > 学术活动

学术报告:Fluctuating macromolecules: polymer rheology, coarse-grained globular proteins, and soft colloids

日期: 2017-06-13     阅读次数:79

报告题目:Fluctuating macromolecules: polymer rheology, coarse-grained globular proteins, and soft colloids

报告人: Daniel J. Read (School of Mathematics, University of Leeds, UK)

报告时间:2017616日(星期五)下午2:00-3:00

报告地点:物理科技楼101

报告摘要:This talk will give an overview of two main areas of Dr Reads research, linked by a common theme of thermal fluctuations or Brownian motion.The first topic is polymer rheology. Polymers are the long, string-like molecules found in all plastic materials.  In the molten state, the molecular strings get tangled up(like noodles!) and their random thermal motion is hindered by these entanglements. The tube model provides a wonderful picture to discuss the polymer motion, and allows practical predictions to be made for the molecular motion, and the flow properties (the rheology) of the material. This part of the talk will discuss recent advances in the tube model which allows quantitative modelling of industrial polymer materials [1,2].The second topic is the coarse-grained modelling of globular proteins.  We have developed a new algorithm, Fluctuating Finite Element Analysis [3] which treats these proteins as fluctuating jelly: that is, we treat the proteins using a continuum model with viscoelastic material properties, to which we add thermal fluctuations.This model allows information on the shape of the protein (available, for example, from electron microscopy) to be used to make predictions on its modes of motion, and interactions with surrounding objects.  We also use this model to describe soft colloids: materials made from small, soft spheres.

[1]  Read, D.J. “From reactor to rheology in industrial polymers Journal of Polymer Science, Part B: Polymer Physics, 53, 123-141, 2015

[2]  Read D.J., Auhl D., Das C., den Doelder J., Kapnistos M., Vittorias I., McLeish T.C.B. “Linking models of polymerization and dynamics to predict branched polymer structure and flow. Science, 333, 1871-1874, 2011

[3] Oliver R., Read D.J., Harlen O.G., Harris S.A. “A Stochastic Finite Element Model for the Dynamics of Globular Macromolecules Journal of Computational Physics, 239, 147-165, 2013

报告人简介:Dr. Daniel J. Read

* Bachelor of Natural Sciences, Cambridge University (1991–1994);

* Ph.D. in Polymer Physics, University of Leeds (1994–1997);

* Postdoctoral Research Fellows, Polymer Physics, School of Physics and Astronomy, University of Leeds (1997 - 2000);

* Lecturer and subsequently Reader, School of mathematics, University of Leeds (2000 - present);



返回


phyedu.suda.edu.cn | 苏州大学物理与光电•能源学部 物理科学与技术学院

Copyright © 苏州大学 2015, All Rights Reserved 苏州市十梓街1号

苏ICP备-002103