Nanometer silica powder (nm-SiO2) is a
new kind of inorganic materials, because of its extra
small size (1 to 100 nanometer). It has many special characteristics;
such as big surface volume, quanta tunnel, and so on.
So all such properties makes it different from other materials.
It can be widely used in electronic encapsulation, polymer
of macromolecule, rubber, plastics, coating, paint, adhesive,
functional fiber, cosmetics and many more applications.
YCIC has researched to manufacture colloidal silica power
from colloidal silica since 1998, and put it into main
products in 2000. Because of its especial technique and
material, the nanometer silica powder has different capabilities
from others. For example, its impurity is lower, its particle
size is smaller(10-20nm), its configuration is more compact,
etc.
YCIC can modify the particle’s surface, than lets the
powder easing to disperse. Therefore it is helpful to
be used.
YCIC has applied its patent in China.
Its main capabilities as following:
SiO2%（wt，dry） ≥99.5%；
Particle size（nm） 5~20
Specific surface area（m2/g） 200~300
Moisture（100℃，2h，wt） ≤3%
Loss on Ignition（900℃，2h，wt） ≤2%
Rocking density(g/cm3) ≤0.05
nm-SiO2
dispersant
The dispersing technology is a key of using nm- SiO2
powder. Dispersing in common way, people only can get
a dispersant of aggregation with the particle size over
hundreds nanometer, the dispersant is always opaque
and unstable.
Coaching with Tsinghua University and Nanjing University,
a new way of anti-aggregation between the particles
was excogitated successfully in our company. In this
method the powders, such as nm-SiO2, can be dispersed
uniformly with a single nm-particle into the solvent
of water, acetone or xylene etc. The dispersant is stable
and transparent, it can be dispersed expediently into
the paint, the oil ink without special mixing equipment.
application
of nm-SiO2
Nanometer silica power (nm-SiO2) is widely used in
many fields, almost all industries about usual silica
powder. For example, it can be used as additive in many
industries to replace silica powder and it can improve
and enhance the functions and capabilities of products,
without changing technical process.
Nm-SiO2 can be used in many other industries as well,
because of its special light, electricity, magnetism
characteristics, and good intensity, good tenacity and
high stability at a high temperature. Example:
1. Rubber
Nm-SiO2 can be used in re-attrite rubber, such as aero
rubber, meridian tyres etc. It can improve the functions
of rubber such as intensity, tenacity, anti-aging, re-attrite
and so on. In addition, nm-SiO2 also can be used in
transparent pastern of sole.
2. Plastic
The intensity, tenacity and anti-aging capabilities
of plastic will be improved after adding nm-SiO2. For
example: the polypropylene (PP), modified by nm-SiO2,
becomes rigid and tough complex. It can be used to made
bumper of cars. Another example, the transparence, tenacity,
intensity and waterproof capabilities of plastic film
are improved after adding nm-SiO2. Once more, adding
nm-SiO2 into organic glass (PMMA) can improve PMMA’s
intensity, impactive tenacity, attrited resistance,
transparence, anti-ultraviolet and anti-aging capabilities.
3. Unsaturated polymer resin (UP)
After unsaturated polymer resin modified by nm-SiO2,
its capabilities will be improved, such as: rigidity,
intensity, abrasion-resistance, heat-resistance, waterproof,
anti-ultraviolet radiation and anti-aging, etc.
YCIC is producing nm-UP with ‘original-locate polymerizing
method’. For more information, please click Introduction
of nm-UP.
4. Epoxy resin
Its rigidity, intensity, tenacity, high temperature
resistance and anti-aging capabilities can be improved
after epoxy resin modified by nm-SiO2.
5. Coating
Using nm-SiO2 in coating we can improve many capabilities
such as suspend stability, thixotropic, weatherability,
anti-washing and anti-infra-red. Nm-SiO2 can be used
in the coating, which solidifies by ultraviolet radiation,
in order to improve its intensity, adhesion and heat-stability.
6. Gooey and sealant
Adding nm-SiO2 into gooey or sealant can improve the
ropy of gooey and the sealed ability of sealant.
7. Other industries
Nm-SiO2 also can be used in chemical fiber, electronic
encapsulation, china, dyeing, painting, medicine, anti-bacterium,
cosmetic industries, and so on.
