Overview of Fumed Silica

Fumed silica, also known as pyrogenic silica, is an ultra-fine, high-purity amorphous silicon dioxide (SiO2) produced via the combustion of silicon tetrachloride in an oxygen-hydrogen flame. It appears as a fluffy white powder and is valued for its ability to thicken, stabilize, and reinforce materials.

Features of Fumed Silica

• High Surface Area: Typically ranges from 50 to 380 m²/g, providing excellent thickening and reinforcing properties.
• Hydrophilic or Hydrophobic Variants: Available in both forms depending on surface treatment, allowing for tailored applications.
• Excellent Thixotropy: Increases viscosity and improves flow properties of liquids and pastes.
• Chemical Inertness: Resistant to most chemicals, making it suitable for a wide range of industrial uses.

•  Enhances free-flowing properties and stability.

Specification of Fumed Silica Nano Silica Powder Silicon Dioxide silicon dioxide SiO2 Hydrophobic Fumed Silica

Hydrophobic Fumed Silica– High-Purity Nano Silicon Dioxide (SiO TWO)

Product Overview

This hydrophobic fumed silica is a nano-grade silicon dioxide (SiO ₂) powder made through flame pyrolysis. It includes ultra-fine bits and strong surface treatment, giving it excellent water-repellent residential or commercial properties. The material looks like a free-flowing white powder with really low bulk density.

Key Attributes

Purity: Over 99.8% SiO TWO.
Surface Area: 50– 400 m ²/ g (wager technique).
Particle Size: Primary fragments average 7– 40 nanometers.
Treatment: Surface-modified with dimethyldichlorosilane or similar organosilanes.
Wetness Resistance: Highly hydrophobic– does not take in water easily.

Efficiency Conveniences

The powder serves as an extremely reliable enlarging and anti-settling representative in liquids. It protects against pigments and fillers from sinking in coverings, adhesives, and sealants. Since it fends off water, it works well in systems exposed to moisture or dampness. It likewise improves scratch resistance, flow control, and storage security. In rubber and plastic substances, it boosts mechanical toughness without damaging flexibility.

Usual Applications

Coatings & Paints: Controls drooping and settling; improves sturdiness.
Adhesives & Sealants: Supplies thixotropy and long-lasting security.
Inks: Avoids pigment splitting up and makes sure smooth application.
Plastics & Rubber: Reinforces material while keeping processability.
Cosmetics: Used in powders and hanker oil absorption and silky feel.

Handling & Storage space

Store in a completely dry, great place in secured containers. Keep away from moisture and straight sunlight. Use typical industrial hygiene methods when handling great powders– use handwear covers, eye defense, and a dust mask if needed. Stay clear of producing airborne dirt throughout transfer or blending.

Applications of Fumed Silica Nano Silica Powder Silicon Dioxide silicon dioxide SiO2 Hydrophobic Fumed Silica

Applications of Hydrophobic Fumed Silica (SiO ₂)

Thickening and Anti-Settling Agent

Hydrophobic fumed silica is extensively utilized to manage the circulation and security of liquids. It quits strong particles from sinking in paints, finishings, and adhesives. This maintains mixtures consistent over time. The powder forms a light network inside the liquid, which provides it body without altering its clearness or color.

Rheology Control in Sealants and Adhesives

In sealers and construction adhesives, this silica helps take care of density and spreadability. It prevents dripping during application and holds form after use. Contractors count on it for clean, exact outcomes– particularly when functioning expenses or on upright surfaces.

Matting Representative in Coatings

Silicon dioxide in its hydrophobic form lowers surface area shine. It creates a soft, even matte finish in timber varnishes, vehicle paints, and industrial finishes. Unlike various other matting agents, it does not compromise the film or minimize longevity.

Free-Flow Ingredient in Powders

Dry blends like seasonings, pharmaceuticals, and toner powders typically glob in humid conditions. Adding a percentage of hydrophobic fumed silica keeps them loose and easy to pour. The silica pushes back moisture, so the powder stays free-flowing during storage and handling.

Reinforcement in Silicone Rubbers

High-performance silicone rubbers need stamina and adaptability. Fumed silica nano powder boosts tear resistance and tensile toughness without making the rubber stiff. It additionally helps the product keep its shape under heat or stress.

Secret Advantage: Water Resistance

Since it is treated to be water-repellent, hydrophobic fumed silica works well in wet or humid settings. It remains efficient where routine silica would take in dampness and lose feature. This makes it optimal for outside products, marine finishings, and moisture-sensitive solutions.

Company Introduction

Welcome to HiphopGalaxy, a trusted global supplier of high-quality silicon dioxide (SiO2) powder, renowned for its exceptional purity and performance. Established with a vision to deliver cutting-edge materials that meet the diverse needs of modern industries, we have positioned ourselves as a leading player in the international market.

Our SiO2 powders find applications across multiple sectors, including adhesives, coatings, pharmaceuticals, cosmetics, polymers, and electronics. Each application benefits from the unique properties of our products—high surface area, excellent thixotropy, chemical inertness, and superior reinforcement capabilities. Whether you need hydrophilic or hydrophobic variants, we offer tailored solutions to meet your specific requirements.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Fumed Silica Nano Silica Powder Silicon Dioxide silicon dioxide SiO2 Hydrophobic Fumed Silica

Frequently Asked Questions About Hydrophobic Fumed Silica (SiO₂)

What is hydrophobic fumed silica?

Hydrophobic fumed silica is a fine white powder made from silicon dioxide (SiO₂). It is created through a high-temperature process that forms nano-sized particles. These particles are then treated to repel water, making the powder “hydrophobic.” This means it does not absorb moisture easily.

How is it different from regular fumed silica?

Regular fumed silica is hydrophilic—it attracts and holds water. Hydrophobic fumed silica has been surface-treated with chemicals like silanes. This treatment changes how it interacts with liquids. As a result, it mixes better in oils and organic solvents instead of water-based systems.

What are its main uses?

This material is widely used as a thickening or anti-settling agent. You’ll find it in paints, coatings, adhesives, sealants, and cosmetics. It also improves flow control and prevents clumping in powders. In industrial applications, it helps stabilize formulations and extend shelf life.

Is it safe to handle?

Yes, when handled properly. Like any fine powder, avoid breathing in the dust. Use gloves and eye protection during handling. Always follow safety instructions on the product’s safety data sheet (SDS). Store it in a dry, sealed container away from moisture.

How should it be stored?

Keep hydrophobic fumed silica in its original packaging. Store it in a cool, dry place with low humidity. Make sure the container stays tightly closed after each use. Even though it repels water, long-term exposure to humid air can still affect performance over time.