Surface modifier formulation design: a comprehensive analysis of types, dosage and usage

In the application field of powder materials, the formulation design of surface modifiers plays a vital role. The surface modification of powders depends largely on the effect of surface modifiers on their surfaces. Therefore, the formulation of surface modifiers, including variety, dosage and usage, directly affects the modification effect of the powder surface and the application performance of the modified products. This formulation design is highly targeted and accurately meets the modification needs of different powders.

Surface modifier varieties

The main considerations for selecting surface modifier varieties are the properties of the powder raw materials, the purpose or application field of the product, as well as the process, price and environmental protection factors.

Properties of powder raw materials

The properties of powder raw materials are mainly acidity, alkalinity, surface structure and functional groups, adsorption and chemical reaction characteristics, etc. Surface modifiers that can react chemically or chemically adsorb with the surface of powder particles should be selected as much as possible, because physical adsorption is easy to desorb under strong stirring or extrusion during subsequent application.

For example, the surfaces of acidic silicate minerals such as quartz, feldspar, mica, and kaolin can be bonded with silane coupling agents to form a relatively strong chemical adsorption; but silane coupling agents generally cannot react chemically or chemically adsorb with carbonate alkaline minerals, while titanate and aluminate coupling agents can chemically adsorb with carbonate alkaline minerals under certain conditions and to a certain extent. Therefore, silane coupling agents are generally not suitable as surface modifiers for carbonate alkaline mineral powders, such as light calcium carbonate and heavy calcium carbonate.

Usage: Details determine the key to the effect

The preparation, dispersion, addition method and compounding order of the surface modifier directly affect its dispersibility and coating uniformity on the powder surface.

(1) Preparation and pretreatment

Silane coupling agent needs to be hydrolyzed to generate silanol before use to achieve chemical adsorption; organic modifiers (such as stearic acid, titanate) can be dissolved in organic solvents (ethanol, toluene) by dry method, and need saponification and emulsification by wet method; inorganic modifiers (such as titanium dioxide precursor) need to control the solution pH value, temperature and additives (such as hydrolysis of titanyl sulfate when white mica is coated with titanium dioxide).

(2) Addition and dispersion technology

Use a spray/drip method linked to the feed speed to ensure uniform coating. When compounding the modifier, first add the main modifier (such as coupling agent) with chemical adsorption as the main method, and then add the auxiliary modifier (such as stearic acid) with physical adsorption as the main method to enhance hydrophobicity and reduce costs.

Modified mineral powders: the key to improving the performance of polymer composites

Powder Coating Machine is a cutting-edge product essential for modern high-tech and new material applications. It plays a vital role in processing non-metallic mineral fillers or pigments used in plastics, rubber, adhesives, polymer composites, functional materials, and coatings.

Modified mineral powder enhances compatibility between inorganic fillers and organic polymers, improving material strength, performance, and cost efficiency while enabling higher filler content. It also imparts unique physical and chemical properties to the final product.

As the core link of powder modification, the surface modifier formula design, its variety screening, precise dosage control and scientific use methods jointly build a key chain to improve the performance and application value of powders. Every design detail, from the deep adaptation of raw material properties to the comprehensive consideration of complex process conditions, demonstrates the deep integration of professional technology and practical experience.

If you are eager to further explore the diverse possibilities of surface modifiers, or are looking for a powder modifier that meets your needs, Cronus looks forward to becoming your trusted partner. Relying on our deep professional technical accumulation and rich industry practical experience, we are committed to tailoring comprehensive and accurate solutions for you to help you break through bottlenecks in the field of powder modification and release greater application potential and commercial value.

Contact us now and let Cronus add power to your powder modification journey with professional strength and open a new chapter of efficient and excellent development!