colloidal silica for nanoparticles
Product Description
Acid silica sol products are independently developed by our company. Through unique purification, surface modification, acid stability and other processes, the products have the characteristics of adjustable PH value and optional acid stabilizer.Products are suitable for catalyst, battery electrolyte, beverage clarifier, fusing treatment agent, organic macromolecular modified materials, special coating and other industries.
Nano-silicon dioxide (Nano-silicon dioxide) is a kind of inorganic chemical material, commonly known as silica. Due to the ultra-fine nano scale, the size range of 1~100nm, it has many unique properties, such as optical properties against ultraviolet light, can improve the aging resistance, strength and chemical resistance of other materials. Very versatile. Nanoscale silica is an amorphous white powder, non-toxic, tasteless and pollution-free. The microstructure is spherical, and the quasi-particle structure is floccular and reticular. The molecular formula and structural formula are SiO2, and it is insoluble in water.
Nano is a scale, ranging from 10 to 9 meters. Nanomaterials refer to at least one dimension in the three-dimensional space in the range of nano size, that is, the range of 1 to 100 nanometers. Nanomaterials have small size effect, surface effect and macroscopic quantum tunneling effect, so they show many unique properties, and have broad application prospects in catalysis, light filtering, light absorption, medicine, magnetic media and new materials.
Chemical property speech
[CAS Login Number] 60676-86-0
[EINECS Login Number]
Molecular weight: 60.08
[Molecular formula and structural formula] The molecular formula and structural formula are SiO2
[Common chemical reactions] Nano silica is a nonmetallic acid oxide, which forms silicate with metal oxide at high temperature. It does not react with other acids except hydrofluoric acid, but reacts with strong base to form salt. It can react with hydrofluoric acid to form fluosilicate acid, the reaction equation is as follows:
SiO2 + 4HF → H2SiF4 + H2O
Hydrofluoric acid and base
[Polymerization hazard] No polymerization hazard
The main purpose
The use of nano silica is very wide, generally adding weight in 0.5-2%, individual product system can be more than 10%. The key to product performance is: fully dispersed to the system. According to different systems, nano silica is dispersed in water, acetone, alcohol or other solvents in advance. For oily systems, auxiliary additives can be used for pretreatment. Mainly used in the following areas,
(1) Electronic packaging materials
By fully dispersing the nano-sio2 after surface active treatment in the silicone modified epoxy resin sealant matrix, the curing time of the packaging material can be greatly shortened (2.0-2.5h), and the curing temperature can be reduced to room temperature, so that the sealing performance of the device can be significantly improved, and the service life of the device can be increased.
(2) Resin composite material
The properties of resin-based materials can be improved by fully dispersing nanometer silica particles into the resin materials. Include: A improve strength and elongation; B to improve wear resistance and surface finish of materials; C Aging resistance.
(3) Plastics
The use of nano silica light transmittance, small particle size, can make plastic become more dense, in the polystyrene plastic film adding silica, can improve its transparency, strength, toughness, waterproof performance and anti-aging performance. The main technical indexes (water absorption, insulation resistance, compressive residual deformation, flexure strength, etc.) of common plastic polypropylene are all up to or above the performance indexes of engineering plastic nylon 6.
(4) Paint
It can improve the suspension stability, thixotropy, weather resistance, washing resistance, etc., so that the bonding strength of the film and the wall is greatly improved, the hardness of the film is increased, and the surface self-cleaning ability is also improved.
(5) rubber
Silica is known as white carbon black, after adding a small amount of nano Si02 in ordinary rubber, the strength, wear resistance and anti-aging properties of the product reach or exceed high-grade rubber products, and can keep the color for a long time unchanged. The abrasion resistance, tensile strength, flexure resistance and aging resistance of nanometer modified color EPDM waterproof roll are improved obviously, and the color is bright and the color retention effect is excellent.
(6), yan (dyeing) material
By adding nano-si02 to the surface modification of organic dyeing material, not only the anti-aging property of the material is greatly improved, but also the indexes such as brightness, hue and saturation are also improved to a certain extent, which greatly widens the grade and application range of organic dyeing material.
(7) Ceramics
Using nano-si02 instead of nano-A1203 can not only play the role of nano-particles, but also the particles of the second phase, can improve the strength, toughness, hardness and elastic modulus of ceramic materials, etc.
Using nano-si02 to composite ceramic substrate, the compactness, toughness and finish of the substrate are improved, and the sintering temperature is greatly reduced.
(8) sealant, binder
The addition of nano Si02, coated with a layer of organic material on its surface, the formation of a network structure, the formation of a silica structure, so that it has hydrophobicity, can inhibit the flow of colloid, accelerate the curing rate, improve the bonding effect, increase the sealing and seepage resistance of the product.
(9) FRP products
The grafting and bonding of nano-particles with organic polymers can increase the toughness, tensile strength, impact strength and heat resistance of the material.
(10) Drug carriers
Using nano - Si02 as the carrier can have a good sustained release effect.
(11) Cosmetics
Nano-si02 is an inorganic component, easy to be compatible with other components of cosmetics, non-toxic, tasteless, white itself, strong uv reflection ability, good stability, after ultraviolet radiation does not decompose, does not change color, and will not react with other components in the formula, for the upgrading of sunscreen cosmetics has laid a good foundation.
(12) antibacterial materials
Using the large specific surface area, multi-mesoporous structure, super adsorption capacity and strange physical and chemical properties of nano-Si02, the functional ions such as silver ion are uniformly designed into the mesoporous surface of nano-Si0X, and the nano antibacterial powder with high efficiency, long duration, high temperature resistance and broad spectrum of antibacterial is developed. Can be widely used in bills, medical and health care, chemical building materials, home appliances, functional fiber, plastic products and other industries.
Product Categories : Silica Sol > Alkaline Sodium Silica Sol