Nanotechnology is seen as one of the key technologies of the future. Nanotechnology refers to a wide range of scientific and technological phenomena which focuses on nanoscale (0.1 to 100 nm). It is the science of developing materials through individual control of atoms and molecules to create products that are thousands of times smaller than current technology allows for. The basis of this technology is to modify the inherent material properties such as color, abrasion resistance, conductivity, etc. the reduction of its size without modifying its chemical composition. nano-particles artificially produced have new properties which are important for the development of new products and applications. The composition of an organic coating (paint) may be may be a formulation simple or complex, with a variety of materials, each having a specific function. The formulations generally have three components designed to be permanent and serve specific functions in the dry film. These components are the pigment, carrier and additives. Pigments provide color and other functions. The vehicles commonly called ligands act as an adhesive to adhere the pigment particles to the substrate or to each other. Finally, the additives are chemicals which modify the coating properties in fluid or solid state.

1. THE USE OF NANO ZNO IN
PAINTS
Luis Tormento
Setembro/2016

2. Introduction
• Nanotechnology is seen as one of the key technologies of the future.
Nanotechnology refers to a wide range of scientific and technological
phenomena which focuses on nanoscale (0.1 to 100 nm). It is the science of
developing materials through individual control of atoms and molecules to create
products that are thousands of times smaller than current technology allows for.
The basis of this technology is to modify the inherent material properties such as
color, abrasion resistance, conductivity, etc. the reduction of its size without
modifying its chemical composition. nano-particles artificially produced have
new properties which are important for the development of new products and
applications.
• The composition of an organic coating (paint) may be may be a formulation
simple or complex, with a variety of materials, each having a specific function.
The formulations generally have three components designed to be permanent
and serve specific functions in the dry film. These components are the pigment,
carrier and additives. Pigments provide color and other functions. The vehicles
commonly called ligands act as an adhesive to adhere the pigment particles to
the substrate or to each other. Finally, the additives are chemicals which modify
the coating properties in fluid or solid state.

3. Introduction
• Organic coatings are essentially pigments dispersed in a solution in
a binder. The binder resin or the basic, is responsible for the
physical or chemical properties of the coating, but these are
affected by the nature and proportions of the pigments present.
The volatile component function is to control the ink viscosity and
to facilitate further manufacturing and application. You can not
accurately determine which combination of properties will have a
formulation. For this fact the applications for a specific paint
formulation remains a "technological art". The appearance and
application of nano-materials offer new opportunities for the
coatings industry. The addition of nano-material coatings to
improve the properties of conventional coatings, and produces
new multifunctional coatings due to their small size.

4. Nano Particles Fillers for Coatings
• Nano-particles are generally considered as the union of atoms or
molecules with a radius of 100 nm. 1 ray nanometer cluster has
about 25 atoms, but many of them are in the cluster surface.
Because of this, the intrinsic properties of nano-materials are
different from conventional materials, because the majority of the
atoms are in different media - in the conventional material atoms
are distributed throughout the particle.
• Nano-materials account for almost as much in increased surface
area, and are chemically very active due to having a very large
number of molecules or atoms on the surface. Substances with
high surface areas have physical, chemical, mechanical, optical and
magnetic properties improved, and this can be exploited in a
variety of structural and non-structural applications. Nano-
particles used as fillers or pigments improve characteristics such as
wear resistance, erosion resistance and corrosion resistance.

5. Nano Particles Fillers for Coatings
• Using a nano-scale component to obtain the
desired properties. Due to higher surface activity
of nano particles, they can absorb more resin
compared to conventional pigments, and reduce
the clearance between the pigment and the
resin. Thus, the nano-particles increase the path
of the corrosive species, and improve the
protective properties and performance of the
coatings. Nano-composites represent a new
level in the various fields of science.

6. Nano Particles Fillers for Coatings

7. Nano ZnO in Paints and Coatings
• Studies have shown that nano-particles of ZnO and their
effects in shape (structure) affect the anticorrosive
properties. The particle size and form (structure) has a
large effect on mechanical properties, permeability of the
film to water vapor and efficiency in protection against
corrosion. There is a connection between the size of the
spherical particle and the anticorrosive efficiency, the
smaller the particle size the better is the corrosion
protection of the coating.
• Following is a table with the different properties
presented by nano ZnO in various types of paints and
coatings

8. Nano ZnO in Paints and Coatings
Material Characteristics
Polyurethane The ratio effect pigment / binder (P / B) in the
anticorrosive properties of polyurethane coatings,
applied on steel showed that the corrosion resistance
(3.5% NaCl in water per 1000 hours) showed a P / B
ratio = 0 . 3 and the common ZnO a ratio P / B = 1.
This means that higher anti-corrosion property can be
obtained with less amount of nano ZnO.
Acríylics acrylic paints with nano ZnO have better distribution
of pigment, still have electrostatic and antibacterial
function. Nano ZnO has higher antibacterial effect
against Staphylococcus Colibacilus and Stafilococus.
Alkyd The nano ZnO combined with titanium dioxide, has
anticorrosive effects, high grade antimicrobial and UV
protection (UVA, UVB and UVC).

9. Nano ZnO in Paints and Coatings
Material Characteristic
Paints for wood Paints with nano ZnO cause moderate mortality in
termites (94% in tests with untreated wood). The
nano ZnO has a high degree antimicrobial and
fungicide on untreated wood.
Navy paints The nanbo ZnO has an extremely harmful effect on
the aquatic environment, particularly the aquatic
flora and fauna. For this reason, the nano ZnO is used
as a component in paints naval use, because due to
their toxicity prevents fouling buildup on the paint.
His exceptional ability to absorb UV radiation (UVA,
UVB and UVC) makes it ideal for outdoor applications,
giving additional protection to the resin increasing the
durability of marine paint.

10. Nano ZnO in Paints and Coatings
Material Characteristic
Hygienic coatings Because of its enormous antibacterial power paints
based on nano ZnO and titanium dioxide, are used in
medical products, packaging for paints for use in
pharmaceuticals, food and air conditioning systems.
Other applications include hospitals, pharmaceutical
units, food processing and places where high
disinfection should be performed - do not forget your
strong UV protection - to eliminate pathogens.
Containers for water storage can also be painted with
nano ZnO based paints due to its huge antimicrobial
power.

11. Conclusion
• The use of nano ZnO in paints offers many advantages, which we
can highlight:
• Better appearance;
• Smoother surfaces and easy to clean;
• Best scratch resistance (scratch);
• Anti-reflective nature;
• Good adhesion to different materials;
• Resistance to UV (UVA, UVB and UVC);
• Good chemical resistance;
• Reduced permeability to corrosive media, and therefore with improved
anticorrosive properties;
• Optical clarity. For resonance effect in some nano ZnO becomes transparent;
• The use of nano ZnO in antibacterial and antimicrobial applications, as well
as its fungicidal effect is a growing field, because these pathogens are
becoming increasingly resistant to bactericides and chemical treatments.
Nano ZnO is a natural treatment and have no evil power to humans

12. Conclusão
• Nota final:O nano ZnO apresenta a
desvantagem de ser levemente amarelo, mas
devido ao seu uso extremamente baixo esse
efeito não se torna um problema. Caso
necessite utilizá-lo em grandes quantidades
sugerimos a combinação com dióxido de
titânio (TiO2) para realçar a cor clara da tinta
ou revestimento.

13. Contato
LT Quimicos
Av. Pedro Severino Jr., 366 Cjto 35
04310-060 – São Paulo – SP – Brasil
Luis Tormento
NPD Director
Luis.tormento@ltquimicos.com.br
Tel: +55 (11) 5581-0708