Aerosil, also known as Fumed Silica, is one of the most widely used additives across different industries. Due to its unique properties, such as lightweight, high specific surface area, and the ability to control material properties, it plays a vital role in the production of various products. In this article, you will learn about the effective use of fumed silica in different industries.
What Is Aerosil (Fumed Silica)?
Manufacturers produce fumed silica, a type of amorphous silica with nano-sized particles, by hydrolyzing silicon tetrachloride (SiCl₄) vapor in a flame. Due to its three-dimensional structure and high surface activity, it can alter the physical and chemical properties of materials. Industries primarily use Aerosil as an anti-caking agent, reinforcing filler, and viscosity controller in various formulations.
Main Applications of Aerosil
1. Viscosity Control in Paints and Resins
One of the primary uses of fumed silica is to adjust the viscosity of paints, coatings, and industrial resins.
- Recommended Amount: Typically, 0.5 to 5% by weight in the paint or resin formulation.
- Addition Method: Gradually add Aerosil to the system during mixing to prevent clumping or undispersed particles.
- Advantages: Prevents paint sagging on surfaces and improves the uniformity of applied layers.
2. Enhancing Strength in Rubber and Plastics
In the rubber industry, manufacturers use Aerosil as a reinforcing agent. It increases wear resistance, flexibility, and the durability of products.
- How to Use: Add fumed silica during the mixing of raw materials.
- Applications: Used in manufacturing tires, sports shoes, and high-performance plastic products.
3. Improving Texture in Cosmetic Products
In cosmetics, Aerosil helps control texture and prevents the settling of active ingredients.
- Target Products: Creams, gels, and sprays.
- Advantages: Provides a soft feel, mattifying effect, and ensures even application of products on the skin.
4. Anti-Caking Agent in Powders
In the food and pharmaceutical industries, Aerosil acts as an anti-caking agent in powders.
- Food Industry: Prevents clumping in powders like sugar or coffee.
- Pharmaceuticals: Prevents aggregation in medicinal powders and enhances the tablet manufacturing process.
5. Use in Adhesives and Sealants
In adhesives and sealants, Aerosil prevents sagging and improves the strength of applied layers.
- Mixing Method: Add Aerosil to adhesives and mix using high-speed mixers for a uniform consistency.
- Applications: Epoxy adhesives, silicone sealants, and industrial caulking materials.
Important Tips for Using Fumed Silica
1. Storage Conditions
- Aerosil should be stored in a cool, dry environment.
- Opened packages must be tightly sealed to prevent moisture absorption.
2. Safety Precautions
- Fumed silica forms fine airborne particles, which may cause respiratory issues if inhaled.
- Always use respiratory masks and gloves while handling this material.
3. Method of Addition
- Gradually add fumed silica to the formulation at low temperatures.
- Use high-speed mixers or mechanical stirrers for uniform dispersion.
Benefits of Using Aerosil
- Improved Mechanical Properties: Increases tensile strength and abrasion resistance in rubber and plastics.
- Enhanced Formulation Stability: Prevents settling of components in paints, coatings, and resins.
- Viscosity Control: Suitable for formulations requiring specific consistency.
- Optical Transparency: Preserves clarity in cosmetic products and specialty coatings.
- Eco-Friendly: Aerosil is non-toxic and considered safe for use in a variety of industries.
Challenges in Using Fumed Silica
- High Cost: Due to the complex production process, fumed silica is considered an expensive additive.
- Specialized Equipment Needed: Effective dispersion requires high-speed mixing equipment.
- Handling Safety: Its lightweight and high dispersibility may cause challenges during transport and handling.
How to Purchase Fumed Silica
Visit the Pishro Shimi website to view products, request pricing, and purchase various polymer additives. Our expert team is available daily to assist and provide support to our valued customers.
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