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 noir. Due to its fineness, it can measure from 1-100nm in size. This gives it unique characteristics such as the ability to improve anti-ageing and strength of other materials.

This amorphous white powder of silica at nanoscale is safe, non-toxic, non-odourless, as well as non-polluting. The microstructure can be described as spherical with a quasi-particle arrangement of net-like structures and flocculent structure. It is insoluble and non-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 exceed 10%. For product performance, it is essential that all components are fully dispersed. According to the different systems, it is possible to disperse your nano-silica using water, alcohol, or acetone in advance. Additives for pretreatment are available to enhance oily systems. It’s used principally in the following industries:

(1) Electronical packaging materials

If the surface-treated silicon oxide is fully dispersed in the silicone modified adhesive resin encapsulant, it will greatly reduce the curing period (2.0 to 2.5h). The curing temperature can also be reduced down to room temp so that both the sealing and service life can be substantially improved.

(2) Resin composite materials

The performance of resin-based products can be vastly improved by uniformly dispersing tiny nanosilicono particles in resin. The material can be improved in strength and elongation by including A; B wear resistance is increased and the surface finish is enhanced; and C anti-aging properties are added.

(4) Plastic

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 polypropylene’s main technical indicators (water absorbtion, insulation resistance residual compression distortion, and flexibility strength), the nano silicon oxide is employed. Performance indicators of engineering nylon 6 are met or exceeded.

It may improve coating’s poor suspension, poor thickness, weather resistance, poor scruff resistance, or other characteristics. The coating film bonding strength is greatly increased and its hardness also increases.


Silica, also known by the name white carbon black, is a form of silicon oxide. The products’ strength, wear-resistance, and resistance to ageing have been improved by the addition of a tiny amount of nano silicone oxide. They can also maintain their colour for longer periods. An EPDM membrane in nanomodified colours that is waterproof and resistant to wear, tear, fold resistance, anti-ageing, and sturdiness is greatly improved.

You can increase the anti-ageing ability of any organic colour (dyeing), but you also get a wider range of indicators such as brightness, hue, and saturation by adding nanosiliconol to your surface modification.

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

A composite ceramic substrate made of nano siliconoxide 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 layer is placed on top to create a network structure.

9 FRP product

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

10 Drug 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-SiOX’s large-specific surface area, its multi-mesopore architecture and bizarre physical and chemical attributes allow the function ions like silver to be evenly distributed into the nano-SiOX mesopores. These ions can be used extensively in high-temperature applications such as medical and dental bills, electrical building materials, household appliances, functional fibers and plastic products.

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 is possible. The material then suffers from poor structure and performance. In order to maintain its stability and enhance its dispersion into the polymer matrix it is important to change the surface.

It is possible to modify the surface of nanosilicon dioxide using many techniques. These methods can generally be classified as either physical or chemical modifications.

Physical modification of nano silicon dioxide

Modifying nano silicon dioxide by physically altering its surface is the most important.

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

The surface modification can produce a wide range of coating structure materials. This can help meet different needs. But, it only adsorbs/coats nano-silica by electrostatic force, van der Waals, and other forces. The organic/inorganic interaction force is therefore weak. Phase separation is possible when environmental factors such as temperature, pH or pressure are changed.

2. A chemical modification to nano silicon dioxide

A large amount of hydroxyl bonds on nano-silica are used to chemically modify it.

(1) The coupling agent modification technique

The silane is one of the most used nano-silica modification methods. It can condense with the hydroxyl on the nano-silica-silica surface and form a siliconoxygen bond.

If a coupling ingredient is being used to modify nano-silica’s surface, then it must first be broken down before it can react. 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, the price of the modifiable fatty alcohol is lower, it’s easy to synthesize and its structure can be controlled easily. The alkyl chain length affects the modulation effect. It must therefore be conducted at high temperature, high pressure and with high reaction 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 can cause chain entanglement between the matrix and graft polymers, which makes this modification easier to control. You have the option to choose different grafting monomers, grafting conditions, and other factors depending on your requirements. The result is greater flexibility and control.

Cataniadagiocare, Cataniadagiocare advanced material Tech Co., Ltd., is a professional manufacturer. It has more than 12 years experience in chemical product development. Please contact us to request high quality Nano silic oxide.

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