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讲座信息

北大工学院先进材料与纳米技术系学术报告


Polymer-clay, polymer-cement and polymer-nanotubes nanocomposites: The role of the interface
 
Henri Van Damme
Ecole Supérieure de Physique et Chimie Industrielles de Paris (ESPCI)
Physico-Chimie des Polymères et des Milieux dispersés
10 rue Vauquelin, 75231 Paris cedex 05, France
henri.vandamme@espci.fr
 
主持人:白树林 教授
 
时  间: 9月26日(周二) 下午15:30 -17:00
 
地  点: 北京大学法学院一层5122-1房间
 
This presentation is a comparative discussion of several parameters which have to be taken into account in the design and the synthesis of nanocomposites with enhanced mechanical properties. The first parameter – or parameters family – gathers the intrinsic mechanical properties of the filler nanoparticles. The second family of parameters is the quality of the filler-matrix interface, “good quality” being associated, in thermodynamic terms, with low interface energy and good wetting conditions. In more chemical terms, it means strong polymer-filler bonds and a high surface density of bonds. In order to discuss the relative importance of these parameters, several systems, taken from the literature and from our own work, will be compared. This will include: (i) amorphous (epoxy, PMMA) and semi-crystalline (Nylon) polymers, (ii) clay, cement or carbon nano-particles and (iii) covalent or van der Waals polymer-filler bonds. The result will be discussed in terms of molecular mobility and glass transition temperature gradient at the interface.
 
Biography:                                                         
 
Henri Van Damme has been professor at ESPCI (Ecole Supérieure de Physique et Chimie Industrielles) in Paris since 1999. He is primarily interested in the chemomechanics of cement-based and clay-based materials and in their interactions with polymers.
Van Damme received his graduate degree in bio- and chemical engineering in 1969 and his PhD degree in materials science in 1973, both from the University of Louvain, Belgium. His thesis work was on diffusion in glasses and in adsorbed fluids. He then moved to the CNRS in Orléans, France, where, after a two-year post-doctoral position researching on adsorption of dye molecules and metal clusters, he was appointed to a research scientist position. From 1976 through 1985, including a sabbatical year at the University of Wisconsin, Milwaukee, Van Damme worked on heterogeneous photocatalysis and on the photochemical conversion of solar energy in colloidal systems. From 1985 through 1999, he was director of the CNRS Research Center on Divided Matter and his interest shifted to porous and dispersed materials, complex fluids, and the physics of fractals, with a growing interest in cement-based materials. In 1999 he joined the ESPCI in Paris to head the Structural and Macromolecular Physical Chemistry laboratory from 1999 to 2005, where he started working on polymer-based hybrids and nanocomposites.
Henri Van Damme has been president of the Condensed Matter Physics division of the National Committee for Scientific Research from 1995 to 2000. He is Scientific Counselor at the Atomic Energy Commissariat (CEA), at the French Petroleum Institute (IFP) and at the Scientific and Technical Center for Building (CSTB). He is the author of approximately 150 papers and book chapters.
 

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