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Research On Nano Silica Application And Nano Silicon Dioxide Surface Modification

Nano Silicon Dioxide:

Also known as “nano-silica”, nano silicon dioxide is an inorganic, chemical material. It’s also commonly called “white carbon black”. Due to the ultra-fine nature of the material, it can be found in the 1-100 nm range. This gives it unique properties like optical properties that are resistant to ultraviolet rays. It’s widely used.

This amorphous white powder made of nano-scale silicona is safe, non-toxic, low in odour, and not polluting. The microstructure can be described as spherical with a quasi-particle arrangement of net-like and flocculent structures. The Molecular Formula and the Structural Formula are both SiO2. It is not soluble in water.

Nano Silica Application:

This is because nano-silica has a very large application. Its weight ranges from 0.5 to 2% and individual product systems can have more than 10%. Full dispersion is the key to product effectiveness. You can mix the nano-silica using water, alcohol, acetone, or another solvent before it is used. Additives for pretreatment are available to enhance oily systems. These are the main uses of it.

(1) Electronical packaging materials

In order to improve sealing performance, and increase the durability of your device’s service life, fully dispersing the surface-treated microsilicon dioxide in the silicone modified resin epoxy resin encapsulant matric can dramatically reduce its curing time (2.0-2.5h).

(2) Resin composite materials

A comprehensive way to increase the material’s performance is to uniformly distribute the nanosilicon o particles in the resin. A enhances strength and elongation. B wear resistance is improved and the surface finish can be enhanced. C Anti-ageing properties are also included.


You can make plastic more dense by using nano silicon oxide to improve light transmission. Addition of silica can make the polystyrene films transparent, strong, tough, waterproof and durable. To modify ordinary plastic polypropylene’s main technical indicators (water absorbtion, insulation resistance residual compression distortion, and flexural strenght), the nano silicon oxide is employed. Performance indicators of engineering nylon 6 can be met or exceeded.

It may improve coating’s poor suspension, poor thickness, weather resistance, poor scruff resistance, or other characteristics. Additionally, it increases the film’s toughness, and also improves its ability to clean up.


Silica, also known by the name white carbon black, is a form of silicon oxide. Addition of a tiny amount nano silicon dioxide to standard rubber has a dramatic effect on the product’s strength, durability, and ability to retain the original colour over time. An EPDM membrane in nanomodified colours that is waterproof and resistant to wear, tear, fold resistance and anti-ageing are greatly improved.

You can increase the anti-ageing properties of organic dye (dye) materials by adding nano silicon dioxide to their surface modification treatment. The indicators of hue, brightness and saturation also get improved.

Replacing nano A1203 using nano SiO2 could play both the role and the nanoparticles of the second phases, which may improve strength, hardness, flexibility, and durability of ceramic materials.

A composite ceramic substrate made of nanosiliconoxide can be improved in terms of its toughness, compaction, and finishing. This also helps to reduce the sintering temp.

By adding nano silicon dioxide, an organic coating is placed on the substrate to create network structures and silica structures. Hydrophobic means that the product can resist colloid flow and accelerate curing time, increase bonding, reduce product impermeability, and improve sealing.

_ (9) FRP product

You can improve your material’s toughness by bonding or grafting organic polymers with nanoparticles.

(10) Drill carrier

Use of nano silicon oxide to carry the drug can have a positive slow-release effect.

(11) Cosmetics

Nano-Si02 inorganic cosmetic component is non-toxic. It has been proven that sunscreen cosmetics can be upgraded by using separate chemical reactions.


The nano-silicon oxide powder has a large specific area. Because of its unique structure and strong adsorption, it is able to absorb functional ions. These ions include silver ions.

Nanosiliconol has very small particles, a wide specific surface area, biocompatibility and the benefits of small size effects, surface interface effect, and quantum size effect.

But, nano-silica surfaces are highly hydrophilic. There is a high number of active and inactive hydroxyl groups. Because of this, secondary aggregation or agglomerates can easily form. This hinders dispersion, which then impacts the structure of the material. In order to preserve the nano silicon dioxide and make the polymer more dispersed, you need to change the surfaces.

It is possible to modify the surface of nano silicon dioxide using many different methods. The most common are chemical modification and physical modification.

Chemical modification of nanosiliconium

Modifying nano silicon dioxide by physically altering its surface is fundamentally what attracts it.

Mostly surfactants are used to modify the properties of nano-silica.

A physical modification can result in a wide range of coating material options that suit various needs. But, it only adsorbs/coats the nano-silica particle by van de Waals force and electrostatic force. The organic phase interacts with the inorganic phase weakly. Phase separation could occur when environmental factors such as temperature, pressure or pH are changed.

2. A chemical modification to nanosilicon dioxide

A large amount of hydroxyl-groups are used on the surface nano silicon dioxide in chemical modification. These hydroxyl groups react with the modifier to lower the number and alter the hydrophilicity of the particle surface.

(1) The coupling agent modification technique

The silane is one of the most used nano-silica modification methods. It can condense with the nano-silica hydroxyl group to form the silicon-oxygen connection.

If a coupling ingredient is being used to modify nano-silica’s surface it must first be decomposed. Self-condensation of hydrolysate, however, will reduce the effectiveness of the coupling with the silica.

(2) Alcohol ester modification method

This method involves using fatty alcohol to react to the hydroxyl group of the surface of nanosilica at high temperature and high pressure in order to modify the wettability.

The silane coupling-agent method offers fewer benefits than the alcohol ester method. For example, it costs less to create the modifiable fatty alcohol, makes the process more straightforward, and can be controlled easily. However, this modification is affected by how long the alkyl chain length of alcohol. It must also be made under high temperature, high pressure and other extreme conditions.

(3) Polymer graft modification method

By grafting the polymer onto nanosilica’s surface in a particular way, you can improve the hydrophobicity of particles as well as their interface affinity within nano-composites. Long-chain structures of the graft polmer may result in chain entanglement between the matrix and graft polymer. This can make this modification tighter and more uniform. Different grafting monomers, grafting conditions, and other factors can all be chosen to allow for greater flexibility and control.

Lemondedudroit, Lemondedudroit advanced material Tech Co., Ltd., is a professional manufacturer. It has more than 12 years of chemical products research, development, and manufacturing experience. Please contact us to request high-quality Nano silica oxide.

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