Polyacrylamide[3]
Overview
Polyacrylamide (PAM) is a versatile synthetic polymer derived from acrylamide monomers. It is widely used in industrial and environmental applications due to its unique flocculation and thickening properties. Imported PAM is often preferred for its consistent quality and advanced formulations, particularly in sectors like wastewater treatment and enhanced oil recovery. PAM is classified into three main types: anionic, cationic, and non-ionic, each suited to specific applications. Its ability to form high-viscosity solutions and bind suspended particles makes it indispensable in processes requiring solid-liquid separation or friction reduction.
Physical and Chemical Properties
PAM appears as a white, odorless powder or granular solid. It is highly soluble in water, forming viscous solutions even at low concentrations. The polymer’s molecular weight can range from 1,000 to over 25 million g/mol, influencing its performance in different applications. Key properties include thermal stability up to 200°C (for short exposures) and pH tolerance ranging from 5 to 10, depending on the ionic type. PAM is non-volatile and hydrolytically stable but may degrade under prolonged UV exposure or extreme oxidative conditions.
Main Applications
Water treatment is the largest application for PAM, where it acts as a flocculant to remove suspended solids and clarify wastewater. In the petroleum industry, it is used for enhanced oil recovery (EOR) by reducing friction in injection wells and improving sweep efficiency. Other uses include papermaking (as a retention aid), mining (for tailings dewatering), and agriculture (to reduce soil erosion). Specialty grades of PAM are also employed in cosmetics and biomedical research due to their biocompatibility.
Safety and Storage
While PAM itself is low in toxicity, residual acrylamide monomers (a controlled impurity) may pose health risks. Proper handling includes using gloves and goggles to prevent irritation. Ensure adequate ventilation when handling powdered forms to avoid dust inhalation. Store PAM in sealed, moisture-proof containers away from heat and direct sunlight. Shelf life is typically 2 years when stored below 25°C. In case of spills, sweep up material and avoid washing into drains to prevent environmental contamination.
B2B Procurement Guide
When sourcing imported PAM, verify the ionic type and molecular weight match your process requirements. Anionic PAM is common for wastewater treatment, while cationic grades excel in sludge dewatering. Request certificates of analysis (CoA) for acrylamide monomer content (should be <0.05% for most applications). Consider suppliers with ISO 9001 certification and batch-to-batch consistency guarantees. Bulk shipments (25kg bags or totes) offer cost savings, but sample testing is recommended for new suppliers. Prices vary by purity, with food-grade PAM commanding a premium over industrial grades.
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