2. Nanotechnology is the understanding and
control of matter at dimensions of roughly
1 to 100 nanometers.
A nanometer is one-billionth of a meter; a
sheet of paper is about 100,000
nanometers thick.
By creating nanometer-scale structures, it
is possible to control the fundamental
properties of materials, without changing
the materials' chemical compositions.
2
9/24/2016
4. Polymer-matrix nanocomposites consist of
a matrix made from a polymeric material
The second phase which is dispersed
within the matrix, has nanoscale
dimensions
the interface-to-volume ratio is significantly
higher than the conventional composites
4
9/24/2016
9. 1.Electrical properties :-
Properties' of PMNC:-
9
9/24/2016
the smaller the nanoparticles, the shorter the
distance between the particles,
This in turn leads to percolation at lower
volume fraction, resulting in higher electrical
conductivity
10. 2.Optical properties:-
.To achieve transparency, scattering must be
minimized
. which means that the nanoparticles should
be as small as possible
.while the index of refraction should remain
as similar as possible to the matrix.
excellent use of nanoparticles in polymer
nanocomposites is in controlling the index of
refraction. 10
9/24/2016
14. 9/24/2016
14
3. Coatings
4. Gas barriers for plastic bottles, packaging
and sports goods
5. Optical glass and membranes
6.Products with low flammability