Surface modification of brucite powder flame retardant and its optimized application in EVA resin

In today's research and development of high-performance materials, improving flame retardant properties while maintaining excellent physical and mechanical properties of materials is a major challenge. As an efficient halogen-free flame retardant, brucite powder has shown good application prospects in a variety of polymer systems, especially in ethylene-vinyl acetate copolymer (EVA). However, in order to fully realize its flame retardant potential and ensure good compatibility with EVA resin, surface modification of brucite powder is key. This article will delve into the surface modification technology of brucite powder and its application optimization in EVA resin.

1. Surface modification technology of brucite powder

1. Coupling agent modification

Using coupling agents such as aluminate, titanate and stearic acid can significantly enhance the bonding force between brucite powder and EVA resin. These coupling agents not only improve filler dispersion but also help improve the overall mechanical properties of the material.

2. Macromolecule compatibilizer

The application of macromolecular compatibilizers such as polyacrylate further improves the dispersion and compatibility of brucite powder in EVA. These compatibilizers enhance the interfacial interaction between inorganic fillers and organic polymers through chemical bonding or physical adsorption.

3. Layer-by-layer assembly technology

Layer-by-layer assembly (LbL) technology forms a multi-layer thin film structure by alternately depositing positively and negatively charged polymer layers on the surface of brucite powder. This structure not only improves the flame retardant efficiency, but also enhances the mechanical properties of the material.

4. Compound modification

Compounding brucite powder with other inorganic nanomaterials (such as zinc oxide, silica) can significantly improve its flame retardant performance and physical and mechanical properties. This composite material optimizes performance through synergistic effects.

5. Surfactant treatment

Surface treatment of brucite powder with surfactants can effectively change its surface properties and improve its dispersion and stability in EVA resin, thereby ensuring the performance consistency of the material during processing.

2. Optimized application in EVA resin

1. Improve flame retardant properties

Surface-modified brucite powder can more effectively inhibit the burning of EVA resin, significantly improve its oxygen index and fire resistance, and meet more stringent safety standards.

2. Improve processing performance

The modification treatment helps the brucite powder to be evenly dispersed in the EVA resin, reduces defects during processing, improves the fluidity of the material, and makes the processing process more efficient.

3. Maintain mechanical properties

Carefully selected surface modification methods can minimize the decrease in mechanical properties caused by the addition of fillers and maintain the flexibility and strength of EVA materials.

By surface modification of brucite powder, we not only improved its flame retardant efficiency in EVA resin, but also optimized the processing performance and mechanical properties of the material. Choosing appropriate surface modification methods and technologies is crucial to the development of high-performance flame-retardant EVA composite materials. Future research should further explore new surface modification technologies and the design of composite flame retardants to adapt to application scenarios with higher performance requirements and promote the innovative development of materials science.