复合材料教案6.doc

Teaching Topic Chapter 6 Polymer nanocomposites Lecturing hours 180 min Teaching Objectives 1. Know the general features of polymer nanocomposites; 2. Know the preparation methods of polymer nanocomposites; 3. Know the characterization of polymer nanocomposites. Teaching Emphases 1. The feature of polymer nanocomposite.2. The preparation of polymer nanocomposite. Teaching Difficult Points The characterization of nanocomposites. Teaching Methods Lecturing + PPT + discussion + interaction Time Arrangement? Teaching content 45 min 6.1 Introduction 1. definition When inorganic phases in organic/inorganic composites become nanosized, they are called nanocomposites. Organic/inorganic nanocomposites are generally organic polymer composites with inorganic nanoscale building blocks. 2. Advantages inorganic material organic polymer 3. Defining feature of polymer nanocomposites the small size of the fillers leads to a dramatic increase in interfacial area as compared with traditional composites. This interfacial area creates a significant volume fraction of interfacial polymer with properties different from the bulk polymer even at low loadings. 4. Inorganic nanoscale building blocks Nanotubes; Layered silicates (montmorillonite, saponite), Nanoparticles of metals (Au, Ag), Metal oxides (TiO2, Al2O3), Semiconductors (PbS, CdS), Others. 5. Polymer/Silica SiO2 is viewed as being very important. Polymer/silica composites are the most commonly reported in the literature. They have been employed in a variety of applications. 6. Discuss: what is nanocomposite? 6.2 Preparation of nanocomposite Organic or inorganic polymerization generally becomes necessary if at least one of the starting moieties is a precursor. Blending is generally just mixing of the silica nanoparticles into the polymer; a sol-gel process can be done in situ in the presence of a preformed organic polymer or simultaneously during the polymerization of the monomer(s); the method of i