HJSIL Fumed Silica, as a brand of fumed silica, offers a range of products with different particle sizes and surface areas to meet the specific needs of different composite applications. The brand's fumed silica products are known for their consistent quality and performance, making them a popular choice among manufacturers of composite materials.
HJSIL® 200 is a commonly used filler material in composite materials. It is a type of silica that is produced by the flame hydrolysis of silicon tetrachloride. The small particle size, high surface area, and uniform distribution of fumed silica make it an attractive filler for composites.
In composite materials, HJSIL® 200 is typically used to improve the mechanical properties, such as stiffness and strength, and to enhance the electrical and thermal conductivity. It is also used to control the viscosity of the composite matrix and to prevent the settling of other filler materials.
Features and Functions in composites
- Reinforcement: Fumed silica acts as a reinforcement material, increasing the stiffness and strength of the composite. This makes the composite more durable and resistant to impact and abrasion.
- Thixotropy: Fumed silica improves the rheological behavior of composite resins, making them thicker and more viscous. This property, known as thixotropy, allows the composite to maintain its shape and resist sagging during processing.
- Flow and Wetting: Fumed silica improves the flow and wetting of composite resins, leading to a more uniform distribution of the filler throughout the composite. This results in better mechanical properties and improved appearance.
- Reduced Weight: Fumed silica has a low specific gravity, which makes it an ideal filler material for reducing the weight of composites.
- Improved Adhesion: The hydrophilic nature of fumed silica improves adhesion between the resin and the filler, resulting in better mechanical properties and improved durability.
Silane Coupling Agents: These are chemical compounds that contain a silicon atom and a functional group that can react with both the matrix and reinforcement fibers. They work by improving the adhesion between the matrix and the reinforcement fibers through the formation of a chemical bond.
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