Wear resisting polymer nanocomposites preparation and properties

Wear resisting polymer nanocomposites preparation and properties 

M Q ZHANG and M Z R O N G, Zhongshan University, People s Republic of China and K FRIEDRICH, Institute for Composite Materials (IVW), Germany 

Since the predominant feature of nano-sized building blocks lies in their ultra-fine dimension, a large fraction of the filler atoms can reside at the interface and lead to a strong interfacial interaction if the nano-fillers are well dispersed. As a result, the nanocomposites coupled with a great number of interfaces could be expected to provide unusual tribological performance. In comparison with the widely used micrometer particulates, nanoparticles are believed to have the following advantages  

In general, surface modification of inorganic fillers can be carried out by utilizing physical or chemical interactions between the fillers and the modifiers. The resultant bonding is often a mixture of secondary and chemical bonds. There is no evident difference between the treatments of micro-particles and nanoparticles, except that it is quite difficult for the surface modifiers to penetrate into the tightly bonded nanoparticle agglomerates, especially in the case of physical treatments such as surfactant treatment and polymer encapsulation. 

Physical treatment (through covering the filler with a low molecular weight surfactant or a high molecular weight polymer) usually results in secondary forces (like van der Waals, hydrogen and electrostatic forces) between the 

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Wear resisting polymer nanocomposites preparation and properties 541... 

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