The main reasons for ultra-fine nanoprocessing of flame retardant materials are as follows:
1.Improve flame retardant efficiency
Increase the specific surface area: The specific surface area of the nano-engineered flame retardant material is significantly increased, which can more fully contact and interact with the free radicals, heat and oxygen generated by combustion.
Formation of barrier layer: Nano-scale flame retardant materials are more likely to migrate to the surface of the material during combustion, and quickly form a continuous and dense barrier layer such as carbon layer or ceramic layer to prevent heat transfer and oxygen entry, thereby effectively inhibiting combustion.
2.Improve compatibility and dispersion with the matrix
Enhance interfacial interaction: The nano-engineered flame retardant material has a small particle size and a significant increase in the contact area with the matrix material, which can enhance the interfacial interaction through physical adsorption and chemical bonding, improve the dispersion and stability of the flame retardant in the matrix, and make it not easy to agglomerate and precipitate.
Reduce the impact on the performance of the matrix: due to the good dispersion, the amount of flame retardant can be reduced under the condition of achieving the same flame retardant effect, so as to reduce the negative impact on the mechanical properties and processing properties of the matrix material due to the addition of a large number of flame retardants, and better maintain the original properties of the matrix material, such as flexibility and strength.
3. Improve physical properties and processing performance
Improve fluidity: nano-flame retardant materials have fine particles, and when used as fillers in the matrix, they can make the composite materials have better fluidity and are easier to process and shape, such as in injection molding, extrusion and other processing processes, which can reduce the difficulty of processing and improve the stability of production efficiency and product quality.
Enhance mechanical properties: When the flame retardant material is evenly dispersed in the matrix and has a good interface with the matrix, it can play a certain role in enhancing and improving the mechanical properties of the composite material, such as tensile strength, impact strength, etc.
In the ultra-fine processing of flame retardant materials, cell mills are commonly used to carry out high-precision grinding and fine processing of materials, and the rotor structure design of cell mills is unique, which can enhance the shear force, so as to achieve nano-scale grinding, which greatly improves the grinding efficiency. Through high-frequency reciprocating stirring, impact and shearing, the ground sample is more sufficient, homogeneous, and the sample repeatability is better, and there is no cross-contamination.
