Chine (Rép. pop) Pro / B2B
Pro / B2B

Fumed Silica

Name:

Fumed silica

Appearance:

Fluffy white powder.

Technical Data of Fumed Silica

Item

Indexes

The nitrogen adsorption specific surface area/m2/g

Typical values±30

Loss on ignition/% ≤

2.5

Silica content/% ≥

99.8

Suspension PH

3.7~4.5

Al2O3 content/mg/kg

400

TiO2 content/mg/kg

200

Ti2O3 content/mg/kg

30

Carbon content/% ≤

0.2

Chloride contentmg/kg

250

105℃ volatiles/% ≤

3

Tap density /g/dm3

30~60

45μm screenings/mg/kg

250

Applications of Fumed Silica

Due to its small particle size, the specific surface area is big, therefore the surface adsorption power, surface energy, high chemical purity

Package Storage and Transportation

This product's hygroscopicity is strong, with more than three layers of kraft paper valve bag packaging, using vacuum packaging machines, automatic packaging.

Description of Fumed Silica

Fumed silica, molecular formula is SiO2. White fluffy powder, porous, non-toxic, tasteless and pollution-free, high-temperature resistant. At the same time, it has the chemical inertness and special thixotropy can significantly improve the tensile strength, tear-resistance, and wear resistance of rubber products, rubber improved strength increased by tens of times. It can be used as rheological and thixotropic control for liquid systems, adhesives, polymers, etc., as an anti-sink, thickening, anti-sagging additive, reinforcement for HCR and RTV-2K silicone rubber, used to regulate free flow, and as an anti-caking agent to improve powder properties, etc. ZHONGTIAN EAST FLUORINE SILICON MATERIAL CO.,LTD. provides fumed silica for sale. As fumed silica manufacturers, we can offer a reasonable fumed silica price. Customers can buy fumed silica for their different needs.

The Role of Fumed Silica in Coatings

Rheology additives

Rheology is an important property of coatings, which directly affects the appearance, construction performance and storage stability of coatings, and the requirements of rheology additives vary from coating system to coating system. For oil-based systems, most of the rheology additives work by forming hydrogen bonds. The untreated fumed silica aggregates on the surface contain multiple, one of which is isolated and undisturbed free, and the other is continuous, forming hydrogen bonds with each other. When the shear force is removed, the three-dimensional structure will recover itself and the viscosity will rise. In completely non-polar liquids, the viscosity recovery time is only a fraction of a second; in polar liquids, the recovery time is longer, depending on the concentration of fumed silica and its degree of dispersion, this characteristic gives oil-based coatings very good storage and construction performance, especially thick paste-shaped coatings, both to ensure that the coating in a certain construction shear has good fluidity, but also to ensure that the coating film of a construction thickness, usually, In the construction process, because the solvent at the edge of the coating evaporates faster, resulting in uneven surface tension, easy to make the coating move to the edge, and the silica network can effectively prevent the movement of the coating and form a thick edge, but also to prevent the coating in the curing process of the hanging phenomenon, so that the coating uniform. At the same time, fumed silica can form hydrogen bonds and increase the low and medium shear viscosity in the system, thus playing a thickening role. Therefore, fumed silica is very widely used in oil-based systems.

Fumed Silica Powder in Foods

Silicon dioxide, a non-metallic oxide formed from silicon and oxygen, can be divided into two main groups; crystalline and amorphous silica. Crystalline silica may exist in several different forms, including quartz, square quartz, and tridymite. Amorphous silica mainly includes hydrolytic silica and fumed silica. The conventional form of amorphous silica is known as a food additive, and fumed silica powder has been used for many years as an important component in food applications such as sauces and seasoning powders, instant noodles, pancake and cake mixes, coffee creamers and vitamins.

For decades, fumed silica powder has had a wide range of applications in the food industry as an anti-caking agent in powdered mixtures, flavorings and coffee whitening agents. Fumed silica powder is a widely used anti-caking agent in the pharmaceutical and food industries. Fumed silica is hydrophilic and has a large number of hydroxyl groups on its surface, which readily interact with each other through hydrogen bonding to form a three-dimensional network. Hygroscopic fumed silica works by absorbing moisture from the environment without liquefying it, reducing friction between particles. In addition, fumed silica is used as a viscosity control agent, emulsion stabilizer, suspending and dispersing agent, desiccant, etc.

Unique "Three-Dimensional Dendritic" Structure of Fumed Silica Powder

As fumed silica powder in the production process, the first halosilane hydrolysis condensation into a single silica particles, and then gradually grow into 7-40 nanometers spherical particles, the particles are called "primary particles" (Primary Particle) of silica.

The "primary particle" in the reaction furnace with the direction of the flame continues to move forward, the particles collide with each other, at this time, because the temperature in the reaction furnace is still relatively high, the particles are still close to the molten state, the particles collide and fuse together, forming a three-dimensional dendritic structure of multiple spherical particles fused together, known as the silica "Aggregate Particle". Since the particles in the aggregates are fused together, they are stable structures that are almost impossible to separate.

Aggregate particles of silica continue to move forward and collide with each other in the pipe, and then join together to form a flocculent, fluffy powder called an Agglomerate Particle of silica. . Due to the low temperature in the pipe, the connection between the "aggregates" is only connected by physical adsorption, which is an unstable structure and can be separated under certain mechanical force.

Zhongtian East is a silicone supplier, if you want to buy silicone material, silicone products or more contact us .

Localisation : No.20 Huayin North Road, High-tech Industrial Park, Quzhou, Zhejiang,China, 324004 No.20 Huayin North Road, High-tech Industrial Park, Quzhou, Zhejiang,China,
Personne à contacter : Cheng Doris, 05708598517

Bonne affaire : acheter au vendeur

Consultez notre guide pour effectuer une transaction en toute sécurité ! En aucun cas Algomtl ne peut être tenu responsable des annonces publiées. Seule la responsabilité du vendeur ou de l'acheteur en cas de litige est engagée.
Nous vous invitons à lire nos conditions générales d'utilisations. Vous pouvez aussi vous rendre sur nos FAQ et consulter notre page d'informations sur les risques liés à la contrefaçon.
Cette page concerne les importateurs et exportateurs de
Fumed Silica

Rechercher dans la catégorie : Pro / B2B
Rechercher dans la catégorie :
fumed, silica
Thailande 50000 Alimentaire
ICUMSA 45 White Refined Cane and Beet Sugar 2016 Crop

Mardi 16 février 2016

Quantité : 10,000MT - Prix : 210 USD/MT CIF

Refined Sugar Icumsa 45 RBU, Icumsa 150, Icumsa 600-1200 Competitive prices & Current cropping Quality guarantee ICUMSA 45 is a highly refined sugar, and it is easily recognizable by its distinctive sparkling white color and pure Sucrose taste. It is suitable for human consumption...

KHUN JACK PARTNERSHIP LIMITED

  • 50000 - CHIANG MAI
  • +66 9 56 19 49 81
Thailande 50000 Alimentaire
Sucre, sucre de canne raffiné , Brown Sugar , sucre de betterave , de canne à sucre ,...

Jeudi 16 juillet 2015

Quantité : 2x 40feets - Prix : 340$

Blanc raffiné SUCRE DE CANNE ICUMSA 45 CARACTÉRISTIQUES : pour la consommation humaine Polarisation: 99,80 % MINIMUM HUMIDITÉ : 00.04 % maximum SULPHATEASH CONTENU: 00.04 % maximum GRANULATION : moyenne à fine SOLUBILITÉ : 100 % SEC ET écoulement libre RAYONNEMENT : NORMAL W / O...

PK - GLOBAL UNIT

  • 50000 - Chiang Mai
  • +66 6 14 84 85 39
Thailande 10150 Alimentaire
Raffiné canne blanche Icumsa 45 sucre en sacs de 50 kg et 25 kg

Mercredi 23 décembre 2015

Quantité : 2000 Metri - Prix : $250/mt CIF

ICUMSA 45 is a highly refined sugar, and it is easily recognizable by its distinctive sparkling white color and pure Sucrose taste. It is suitable for human consumption and use in a wide range of food applications. It is perpetually in high demand as it is the safest form of sugar...

Khun Jack Partnership Limited

  • 10150 - chaing Mai
  • +66 9 56 19 49 81