Green and environmentally friendly brucite powder flame retardant
Brucite powder is used as a green and environmentally friendly flame retardant in a variety of polymer materials. Through detailed experimental research, this paper explores the effects of the addition amount, particle size distribution and surface modification of brucite powder on the flame retardant properties of polymers, and proposes an efficient and environmentally friendly flame retardant technology solution.
With the enhancement of environmental awareness and the increasingly stringent relevant regulations, the development of green and environmentally friendly flame retardants has become an important topic in the field of polymer materials. Brucite powder has become an ideal candidate material for flame retardants because of its good flame retardant effect, environmental friendliness and abundant resources.
Introduction to Brucite Powder
Chemical composition: The main component of brucite is magnesium hydroxide (Mg(OH)₂), which is a natural mineral.
Flame retardant principle: Under heating conditions, brucite powder decomposes to produce water and magnesium oxide. The evaporation of water can take away a lot of heat and slow down the combustion rate of the polymer; while magnesium oxide can form a protective layer on the surface of the material, isolate oxygen and inhibit the spread of flames.
Addition amount and particle size distribution
Addition amount: The addition amount of brucite powder has an important influence on the flame retardant effect. Generally speaking, the larger the addition amount, the more obvious the flame retardant effect.
Particle size distribution: Smaller particle size is conducive to improving the uniformity of dispersion of brucite powder and polymer matrix, thereby improving the flame retardant effect.
Surface modification
Modification purpose: Improve the compatibility of brucite powder and polymer matrix, reduce filler agglomeration, and improve the mechanical properties of composite materials.
Modification method: Common surface modification methods include coupling agent treatment, surfactant treatment, etc.
Application case
Polyurethane foam: Brucite powder can effectively improve the flame retardant properties of polyurethane foam while maintaining good mechanical properties.
Plastic products: Adding brucite powder to plastics can improve the flame retardant level of products and meet the requirements of different safety standards.
Coatings: Brucite powder can be used as a flame retardant to produce flame retardant coatings, which are widely used in the fields of building interior and exterior walls and furniture.
Raw materials: Brucite powder, polymer matrix (such as polyurethane, polypropylene, etc.).
Preparation process: After the brucite powder and the polymer matrix are mixed evenly, they are processed into the desired product by extrusion, injection molding or coating.
Performance evaluation
Flame retardant performance: The flame retardant performance was evaluated by oxygen index method (LOI), vertical combustion method (UL-94) and other methods.
Mechanical properties: The mechanical properties such as tensile strength and flexural strength of the composite materials were determined.
Thermal stability: The thermal stability of the composite materials was studied by means such as thermogravimetric analysis (TGA).
Results and discussion
Flame retardant performance: The addition of brucite powder significantly improved the flame retardant properties of the polymer material, and the oxygen index was significantly improved.
Mechanical properties: The interface compatibility between brucite powder and polymer matrix can be improved by surface modification, so that the mechanical properties of the composite material are improved while maintaining good flame retardant properties.
Thermal stability: The addition of brucite powder improves the thermal stability of the composite material and helps to extend the service life of the product.
As a green and environmentally friendly flame retardant, brucite powder has good flame retardant effect and environmental compatibility. Excellent flame retardant and mechanical properties can be achieved through reasonable addition amount control, particle size selection and surface modification, which provides a new direction for the development of high-performance flame retardant composite materials.