Introduction:
Nano silicon dioxide powder (nano SiO2) has strong electronic and electrical properties, which can greatly improve the properties of materials. The special epoxy resin nano SiO2 (SP30S) prepared from Wanjing nano SiO2 SP30 by special epoxy-affinity coupling agent has better dispersibility, can greatly improve the tensile strength, impact strength, elongation at break, thermal stability and other properties of epoxy resin, and maintain transparency.
Technical indicators:
Item Index
Appearance White powder
Model SP30S
Particle size nm 30±5
Specific surface aream2/g 150-250
Nano silica content % ≥99.5
PH value 5-7

Nano silicon dioxide powder for epoxy resin (Nano SiO2)

Application
1. Heat resistance: nano SiO2 particles have a large specific surface area, strong adhesion with epoxy matrix, absorb a lot of impact energy, and increase the rigidity of the matrix, so nano SiO2 particles in a certain range of strengthening and toughening of epoxy resin, but also improve the heat resistance of the material.
2. Reinforcement and toughening effect: The impact strength, tensile strength and elongation at break of epoxy resin composites have been greatly improved due to the addition of nano SiO2 particles, which indicates that nano SiO2 particles play an important role in strengthening and toughening. The material property has been greatly improved.
Usage method:
In the stirring state, the drying dehydrated nano SiO2 was added to the solvent containing coupling agent, and then treated for several decades by milling, high-speed shearing, ball milling, sand grinding, ultrasonic wave, etc. In the stirring state, the above solution and epoxy resin are mixed evenly, the solvent is removed, and the temperature is raised to 130 C, so that the coupling agent reacts with the epoxy resin for 1 h. After cooling, the curing agent is added, and the mixture is evenly mixed. After evacuation and degassing, the solution is poured into the steel mold coated with the degassing agent and preheated. After curing, the temperature is programmed and the curing agent is completely cooled. Remove film.
Added amount:
Suggested dosage, epoxy resin and nano SiO2 quality ratio of 100:5, customers can also choose the appropriate proportion according to their actual situation.
Dispersion of nano SiO2 powder:
Because of the small size, high surface activity and easy agglomeration of nanoparticles, nanoparticles should be fully dispersed in the preparation of nanoparticles filled composites.
Because of the high surface energy, strong adsorption, easy aggregation, difficult to uniformly and stably disperse, we use milling, high-speed shearing, ball milling, grinding, ultrasonic treatment and coupling agent to promote the uniform dispersion of nano-silica in epoxy resin.
According to the monolayer theory of coupling agent, the particle size decreases, the amount of coupling agent increases, and the mass ratio of silane coupling agent to nano-silica is 5/100.
Packing: 10 kg / bag.
Storage: Nano SiO2 powder should be stored in a dry, sealed environment, not exposed to volatile substances.

Introduction: 

The strength of traditional cement-based materials is low, adding a certain amount of nano SiO2 powder instead of a part of an ordinary concrete miscible aggregate, thereby improving the performance of concrete. After special nano treatment, the surface of nano silicon dioxide powder can be enhanced, and it is easy to form bonds with hydration products in cement paste to produce CSH gel. Moreover, nano SiO2 has a special network structure, which can establish a new network on the basis of the original network structure of cement paste, thus forming three dimensional. The network structure can greatly improve the physical and mechanical properties and durability of cement paste. Therefore, nano silica can be applied to high-strength cement based pavement materials.

Technical indicators:

Nano silicon dioxide powder for concrete (Nano SiO2)

Application: 

1. Adding nano SiO2 powder into cement mortar can improve the compressive and flexural strength of cement mortar at different ages.
2. It can reduce the slump and expansion of concrete.

3. It can increase the autogenous shrinkage strain of concrete and improve the resistance to Cl- penetration and frost resistance of concrete.
4. It can obviously improve the transition interface structure of aggregate and paste in concrete.
5. It is recommended to use nano silica material in liquid superplasticizer and stir with other materials.

Addition: 2-5% is recommended. Users can choose the best additive value according to their actual situation.

Packing: 10 kg / bag.

Introduction:

Nano silicon dioxide powder for coating (nano SiO2)  added to the coating can improve the scrubbing resistance, strength and hardness of the coatings. Adding a small amount of nanometer silicon dioxide (SP30T) into the coating, the anti-ultraviolet aging test performance of the coating can be improved from 250 h to more than 600 h, the abrasion resistance can be improved more than 10 times, the drying time can be greatly reduced, and the problems of poor suspension stability, poor thixotropy and low finish of the raw materials are also very good. The solution. Adding nano-silica (SP30T) to the coating can also significantly improve the opening effect, the coating is not stratified, anti-hanging, good workability, anti-fouling greatly improved, and has excellent self-cleaning and adhesion.
Technical indicators:

Nano silicon dioxide powder for coating (Nano SiO2)

Characters and application: 

1. Washable: Brush resistance increased from thousands of times to tens of thousands of times.
2. Weather resistance: Weather resistance can be increased by about three times, adding a certain amount of nano-silicon dioxide (SP30T) can make the traditional coating products anti-ultraviolet aging performance from 250 hours to more than 600 hours.
3. Anti-fouling and self-cleaning properties: The research shows that the anti-fouling and self-cleaning properties of the coating can be improved by the following ways. Firstly, the nano-silica porous structure is used to form a nano-scale geometric complementary interface structure (such as convex and concave phase) on the surface of the coating by certain technological means. Gas forms a stable gas barrier on the surface; second, surface treatment of nano-silica particles to make the surface show amphiphilic or bi-sparse, effectively improve the wettability of rain water on the surface of building coatings and dust adhesion, improve the anti-fouling and self-cleaning ability of the coating.
4. Antibacterial: In the coating, when the addition of nano-silica (SP30T) exceeded 0.5%, the coating showed an obvious antibacterial effect.
5. Hydrophobic anticorrosion: nano-silica (SP30T) hydrophobic anticorrosion coating, not only has good adhesion, corrosion resistance but also has high density and ion permeability.
6. Transparency: nano SiO2 (SP30T) can ensure the transparency of nano modified coatings. A high wear-resistant transparent coating was prepared by using nano-silica (SP30T), and its wear resistance was increased more than 10 times.
7. Hardness: When nano SiO2 (SP30T) particles are uniform in organic materials and dispersed in a single particle, nano particles, like rigid chains, play a role in enhancing organic materials, thereby improving the film hardness of UV curable coatings, up to 2.5 times.
8. Thermal stability: In UV curing coatings, nano-silica can improve the glass transition temperature of the film.
9. Viscosity: the addition of nano SiO2(SP30T) can significantly improve the viscosity of coatings.

Added amount:

Practice has proved that adding 2% nano SiO2 (SP30T) into the coatings has the best hardness, adhesion, weathering resistance, viscosity, anti-sedimentation and stability of the coatings. The recommended dosage is 0.5 – 2%, and the individual product system can be more than 10%.

Usage method:

The dispersion of nano SiO2 can be achieved by many methods, such as milling, high-speed shearing, ball milling, grinding, ultrasonic dispersion, etc. The first two methods are more used. Nano scale silicon dioxide is added to the coating, and its dispersing steps are divided into one step method and two step method.

One-step process refers to adding nano-silica into the raw material system of the product to obtain a certain content of the product directly. One-step process is characterized by simple production process, more suitable for large-scale, single product production.

The two-step method is to disperse nano-silica in a high proportion to the raw material to prepare masterbatch, and then add the raw material to dilute to a certain proportion. The characteristics of the two-step method are that the viscosity of the system is high, the shear force is large when dispersing, and the nano-silica disperses well, so it is suitable for multi-variety production.

Introduction:

Nano silicon dioxide powder (Nano SiO2) is characterized by small particle size, many micropores, large specific surface area, high surface hydroxyl content, and strong reflectivity to ultraviolet, visible and infrared light. Especially with the improvement of the surface treatment process, the degree of soft agglomeration of nanoparticles is obviously reduced, and the compatibility with organic polymer materials is good.

Character:

1, The product is a white powder, non-toxic, tasteless, pollution-free and chemically stable.

2, high-temperature resistance, large surface area and small particle size.

3, good dispersion, suspension, vibration liquefaction.

4. It has good thixotropy.
5. It has good reinforcement and a thickening effect.
6. After surface treatment, it has better hydrophilic and lipophilicity.

Nano silicon dioxide powder

Technical indicators:

Recommended dosage:
The recommended dosage of the product is 0.5-2%.

Packing: 10 kg / bag.

Introduction:

Gas phase nano silicon dioxide powder (SiO2)  is characterized by small particle size, many pores, large specific surface area, high surface hydroxyl content, ultraviolet, visible and infrared reflectivity. Especially with the improvement of the surface treatment process, the degree of soft agglomeration of nanoparticles is significantly reduced, and the compatibility with organic polymer materials is good.

Character:

White, solid colloidal particles, primary particles from about 5-40 nm, with significant thixotropic, reinforcing, thickening, filling and other functions, except hydrofluoric acid and concentrated alkali, in all solvents and liquids can not be dissolved.

Technical indicators:

Gas phase nano silicon dioxide powder (SiO2) Application:

Nano SiO2 is mainly used in silicone rubber, building sealants, coatings, electronic power, aerospace, pharmaceutical and medical materials, resin processing, ink printing, pesticides and other industries.

1. Silicone acid glue, room temperature vulcanized silicone rubber (low water content), silicone neutral gum.
2. Sealing rings, gaskets, oil pipes, insulators, tablet powder preparations, artificial organs, infusion pipes, latex nipples and advanced inks.
3. Resin thixotropic agent for thickening agent and synthetic grease for resin thickeners and electronic components.
4. Used for silicone rubber reinforcing agent, transparent artificial organ, artificial heart and other medical silicone rubber.

Storage and transportation:

Nano SiO2 should be stored in ventilated and dry warehouses. During transportation, prevent moisture, water, pressure and handling.

Packing: 10 kg / bag.

Introduction:

As a sizing additive, nano silicon dioxide powder (nano SiO2)  can enhance the adhesion of sizing fluid to fiber, and improve the sizing performance of cotton yarn and polyester-cotton yarn effectively; the hydroxyl content in the yarn directly affects the improvement degree of nano SiO2 powder to sizing performance, and nano SiO2 powder can improve the surface properties and mechanical properties of cotton sizing yarn. It can improve the effect better. This product has been prepared by a special process, nano SiO2 powder has high activity, so the binding ability with hydroxyl groups on the surface of yarn has been greatly improved, which is more conducive to sizing.

Technical indicators:    

Nano Silicon dioxide powder for textile

Characteristics:

1. It is advantageous to enhance the adhesiveness of the sizing liquid to the fiber. There is a strong or weak hydrogen bond between the active hydroxyl groups on the surface of the sizing liquid and the hydroxyl groups on the starch and cotton fibers, which can effectively improve the sizing properties of cotton and polyester-cotton yarns.
2. Nano SiO2 powder is more conducive to sizing cellulose fibers.
3. It has the effect of strengthening and increasing grinding and reducing hairiness.
4. The sizing film of nano SiO2 powder size mixture has better wear resistance than that of pure starch size mixture.

Packing: 10 kg / bag.

Introduction:

The mechanical strength of pure rubber is very low. The tensile strength of vulcanizate can be increased from 0.35 MPa to 14 MPa when the filler is mixed with nano SiO2 (SR01). The reinforcing rate is 40 times higher than that of other rubber (1.4-10 times). It can be seen that the use of nano SiO2 (SR01) filler on silicone rubber. Final performance plays a decisive role.

Nano silicon dioxide powder is the best filler for reinforcing high-temperature vulcanized silicone rubber. Nano SiO2 aggregate has a good reinforcing effect on silicone rubber. When nano SiO2 (SR01) powder is added into the rubber, a microcrystalline zone with SiO2 as the nucleus is formed, which increases the physical crosslinking point and is easy to crystallize. The strength of rubber can be increased by 40 times.

Technical indicators:

Nano silicon dioxide powder for rubber

Characters in application: 

As a reinforcing agent and anti-aging agent, nano silicon dioxide powder (SR01) can be used in rubber products to improve the strength, toughness, anti-aging, anti-friction and ignition, and prolong the life of rubber products.

Nano SiO2 is a very effective reinforcing filler for RTV silicone rubber, which can significantly improve its strength. On the one hand, it is due to the small size effect and large specific surface area of nanoparticles; on the other hand, it contains a lot of light silicon radicals on the surface of nanoparticles, which can form a network structure through the interaction of hydrogen bonds and van der Waals forces. At the same time, silica particles also interact strongly with polysiloxane molecules, improving the boundaries. Face condition. The reinforcing effect of nano SiO2 powder on silicone rubber is affected by its particle size, specific surface area and structure. Generally, the smaller the particle size, the larger the specific surface area, the higher the structure, the better the reinforcing effect, the higher the strength and hardness of vulcanizate.

Added amount:

Silicone rubber: 3.0-30%; polysulfide rubber: 0.1-5%;

Polyurethane: 3.0-25%; acrylic ester: 0.5-3.5%

Usage method:

The raw rubber, hydroxyl silicone oil and nano SiO2 (SR01) were blended evenly on a twin-roller rubber-making machine according to the formula proportion. The rubber was thin through the sheet. After heat treatment at 170 C for 2 h, the vulcanizing agent was added and the sheet was thin through the sheet. The next day the vulcanizing machine was molded. The curing condition is 175 T90. T90 LH-90 is used to determine the cure time of vulcanizates.

When nanometer silicon dioxide (SR01) is added to rubber, the degree of dispersion in the polymer must be paid attention to. The dispersion degree of nano silicon dioxide powder in the system has a great influence on the properties of rubber. In the transparent rubber system, the higher the transparency, the better the dispersion degree of nano silica.

Packing: 10 kg / bag.

Storage: Nano SiO2 should be stored in a dry, sealed environment, not exposed to volatile substances.