Metal/Polymer Nanocomposites: Brief Outline
SUMMARY: Metal polymer nanocomposite and nanomaterial as nanotechnology example.
Modern technology continuously need new materials with special combination of
Many efforts have been made in the last decades using novel
nanotechnology and nanoscience knowledge
to obtain nanomaterials with determined functionalty.
Metal-polymer nanocomposites are a typical example: using nano-particles (nanostructured metal)
as additives in polymer matrix.
Nano-sized metals has different properties from bulk metals originating from nanocrystals
size. Nanocrystals measure a few nanometers containing few hundred atoms. In
this way, nanomaterials shows unique properties (electronic, magnetic,
structural) depending on nano-size structure.
Physical and chemical properties of metal nanoparticles...
The specific-size dependence of these properties becomes evident when they:
- no longer follow classical physical laws but rather are described by quantum mechanical ones;
- are dominated by particular interface effects;
- exhibit properties due to a limited number of constituents, since the usual term "material";
refers to an almost infinite number of constituents (e.g. atoms, molecules) displaying an averaged statistical behavior.
Moreover, embedded metal nanoparticles, profoundly affect polymer
typical mechanical and physical properties (glass transition, crystallinity etc.)
open a wide range of potential applications
(barrier properties, mechanical and fire resistance).
In this way, metal-polymer nanocomposites may be applicated for a number of technological applications
such as optical devices, optical sensors, light color filters.
Metal Polymer Nanocomposite Synthesis...
Very important are nanoparticles size and shape in order to obtain predefined properties of nanomaterials.
At present two different techniques can be use to obtain metal-polymer nanocomposites:
-Ex-Situ synthesis method;
-In-Situ synthesis method.
In the in-situ tecnique nanoparticles are generated inside polymer matrix by decomposition of metal precursors.
First, monomer is polymerized in solution containing metal ions chemical species,
then metal nanoparticles are obtain reducing metal ions through chemically, thermally or photolysis methods.
In the ex-situ tecnique first nanoparticles are produced by chemical methods
then are distributed into a polymer solution or monomer solution to polymerize.
Other type of tecniques have been studied in order to obtain optimal properties controlling size and shape of nanaparticles
in matrix or polimeric film (e.g Vapor deposition cryochemical synthesis).
Many research plans have been implemented worldwide lead to large a
large amount of literature reference about that.
Nanotechnology Metal Polymer Nanocomposites Future Opportunities
Goal is produce engineered nanomaterials can be potentially used for a variety of diverse application: optical devices,
filter color, sensors, polizares, magnetic data storage nano-system and more over.