Recently, powder surface modification technology has attracted much attention due to its key role in various fields. As a core technology for regulating the surface properties of powder particles and improving their application performance, powder surface modification optimizes key indicators such as wettability and dispersibility of powders through physical, chemical or mechanical methods. It effectively solves the industry pain point of easy agglomeration of ultra-fine powders, and at the same time endows materials with special functions such as heat resistance and weather resistance, which are widely used in coatings, rubber, cosmetics and other industries. At present, powder surface modification methods show diversified development, mainly divided into three categories: organic modification, inorganic modification and composite modification. Organic modification is centered on surfactants and coupling agents.

     The dosage of surfactants is usually 0.1% to 10% of the powder quality, with flexible processing methods; coupling agents, relying on their unique molecular structure, achieve efficient combination of inorganic powders and organic resins. Silane-based, titanate-based and other products have significant effects in reinforcement and toughening. Inorganic modification significantly improves the stability of materials by forming oxide coatings on the powder surface. Common powders such as titanium dioxide and calcium carbonate have greatly expanded their application scope after inorganic modification.
    The rise of composite modification technology has become a highlight of the industry. The synergistic use of inorganic modifiers and organic modifiers can not only ensure the stability of the powder, but also enhance its compatibility with polymers, achieving performance complementarity. For example, after "inorganic coating + organic modification" composite treatment, polymer fillers have simultaneously improved heat resistance and dispersibility, meeting the strict requirements of high-end materials.
    With the upgrading of the material industry, the application of new additives such as modified silicone oil has injected new impetus into technological innovation. For instance, alkyl-modified trisiloxane, with its characteristics of extremely low surface tension and rapid penetration, has achieved dual applications in personal care and agricultural fields, promoting the development of modification technology towards high efficiency and multi-functionality. In the future, customized modification schemes that accurately match application scenarios will become the core development direction of powder surface modification technology.

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