Overview
Polyvinylidene Fluoride Micropowder (PVDF) is a specialized form of PVDF, a fluoropolymer with exceptional chemical and thermal stability. Its micropowder form enhances dispersibility and surface area, making it ideal for coatings, composites, and advanced materials. PVDF micropowder is synthesized through emulsion or suspension polymerization, followed by micronization. Its unique molecular structure—comprising alternating CH2 and CF2 groups—confers resistance to acids, bases, and solvents, alongside piezoelectric properties.
Physical and Chemical Properties
PVDF micropowder exhibits a crystalline structure with a melting point around 171°C, ensuring stability in high-temperature applications. Its density of 1.78 g/cm³ and low moisture absorption make it suitable for humid environments. The polymer's solubility in polar solvents like DMF and acetone facilitates its use in solution-based processes. Notably, PVDF is inert to most chemicals, including halogens and oxidizers, but may swell in ketones or esters.
Main Applications
PVDF micropowder is widely used in high-performance coatings for architectural and industrial surfaces due to its UV resistance and weatherability. It also serves as a binder in lithium-ion battery electrodes, enhancing adhesion and conductivity. In filtration, PVDF membranes derived from micropowder offer durability and chemical resistance for water treatment and pharmaceuticals. Emerging applications include piezoelectric sensors and 3D printing materials.
Safety and Storage
While PVDF is generally non-toxic, inhalation of fine particles may irritate respiratory tracts. Use NIOSH-approved masks and ensure proper ventilation during handling. Avoid contact with eyes and skin; wear gloves and goggles. Store PVDF micropowder in sealed containers at room temperature, away from moisture and direct sunlight. Prolonged exposure to high temperatures (>200°C) may degrade the polymer.
B2B Procurement Guide
When sourcing PVDF micropowder, prioritize suppliers with ISO 9001 certification. Key specifications include purity (>99%), particle size (typically 1-100 µm), and molecular weight distribution. Request technical datasheets and batch-specific test reports. For large orders, negotiate bulk pricing and confirm logistics conditions—PVDF is sensitive to humidity during transit. Spot-check deliveries for consistency in color and particle size.
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