RICE HUSK SILICA

From ASH to CASH

HYDROPHILIC SILICA

Silica is known to provide many benefits and improve performance in a myriad of products in various industries. Silica is hydrophilic by nature because of the presence of hydroxyl groups (-OH) that is attached to the surface of the silica particles. The structure of the silica is dense and the hydroxyl groups also make it highly dispersible in water due to its water absorbing capabilities.

Silica is known to provide many benefits and improve performance in a myriad of products in various industries. Silica is hydrophilic by nature because of the presence of hydroxyl groups (-OH) that is attached to the surface of the silica particles. The structure of the silica is dense and the hydroxyl groups also make it highly dispersible in water due to its water absorbing capabilities.

The general benefits for industrial applications are improved processability, increased mechanical properties (abrasion resistance, tensile strength, etc.), enhanced rheological properties (anti-settling, anti-caking, anti-sagging, etc.), and many more.

Rice husk (RH) silica is 100% amorphous and produced through a precipitation process and can be customized to provide different properties to suit a large range of applications and industries. A number of variables can be controlled through a proprietary process such as SiO2%, BET, particle size, particle size distribution, pore size, pore volume, moisture content, and others.

HYDROPHOBIC SILICA

The surface of silica has silanol groups (Si-OH) that are hydrophilic and siloxane groups (Si-O-Si) that are moderately hydrophobic. Through Silanization, which is the process of treating the silica with reactive Organosilanes to modify its surface which eventually leads to its hydrophobicity. In this process, the hydrophilic group end of the silanol group is reacting with certain organic groups in the reactive silane to induce surface modification on the silica particles. Physical structure of the hydrophobic silica is porous and due to the surface modification, it displays excellent hydrophobicity.

The benefits of using hydrophobic silica industrially are improved processability and rheological properties, water repellent properties, increased corrosion resistance, improved reinforcement and scratch resistance, thixotropy agent and many more.

Through a unique surface modification process, BSB has successfully developed RH silica with different levels of hydrophobicity. Please refer to the following guide for some of the main applications of RH hydrophobic Silica produced by BSB: BSB Nanotech Rice Husk Bio-Based Hydrophobic Silica.

Download: Biosil Hydrophobic Silica - Application Guide

SUPERHYDROPHOBIC SILICA

Superhydrophobic silica has higher hydrophobicity in comparison with hydrophobic silica due to its contact angle value being higher than 150 degrees. It makes surfaces rebound water droplets which in turn induces many new benefits and functions in industrial products.

Superhydrophobic

The key benefits obtained from Superhydrophobic silica is anti-corrosion, anti-fouling, self-cleaning property, and anti-microbial properties. It can be used in a wide range of industries such as Paints & Coatings, Rubber & Plastics, Metal, Maritime industry, Glass, Ceramics etc.

BSB is pleased to announce the successful R&D program leading to the creation of RH Superhydrophobic silica. R&D on the various applications of Superhydrophobic silica is ongoing, especially in the Paints & Coatings industry.

Please refer to the following guide for some of the main applications of Rice Husk Bio-Based Superhydrophobic Silica produced by BSB.

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