Overview
Lithium polyacrylate is a lithium salt of polyacrylic acid, classified as a superabsorbent polymer (SAP). It is synthesized through the polymerization of acrylic acid followed by neutralization with lithium hydroxide. The material exhibits exceptional water absorption capacity, often swelling to many times its original volume. Due to its ionic nature, lithium polyacrylate is particularly valued in applications requiring lithium ion conductivity, such as battery electrolytes. Its unique properties also make it useful in agriculture, construction, and hygiene products where water retention is critical.
Physical and Chemical Properties
Lithium polyacrylate appears as a white, odorless powder or granular solid. It forms hydrogels upon contact with water, absorbing up to 100-300 times its weight in aqueous solutions. The polymer is thermally stable up to approximately 200°C before decomposition begins. Chemically, it is characterized by repeating carboxylate groups bound to lithium ions, which contribute to its ionic conductivity. The material is insoluble in water but disperses to form viscous gels. Its properties can be modified by cross-linking density, which affects absorption capacity and mechanical strength.
Main Applications
In the energy sector, lithium polyacrylate serves as a binder or gel electrolyte in lithium-ion batteries due to its ionic conductivity and electrochemical stability. It helps improve battery safety by reducing liquid electrolyte leakage. Agriculture utilizes this polymer as a soil conditioner to retain moisture in arid regions. Industrial applications include use in water-blocking tapes for cables and as a thickening agent in coatings. Recent research explores its potential in biomedical hydrogels for drug delivery systems.
Safety and Storage
While lithium polyacrylate is generally considered non-toxic, proper handling precautions should be observed. Dust inhalation should be avoided by using appropriate respiratory protection during large-scale processing. The material is non-flammable but may decompose at high temperatures, releasing small amounts of carbon oxides. Storage requires dry conditions below 30°C in tightly sealed containers. Moisture exposure leads to premature gel formation. Bulk storage areas should have adequate ventilation and be separated from strong oxidizers to prevent potential reactions.
B2B Procurement Guide
When sourcing lithium polyacrylate, buyers should specify technical parameters including purity (typically 95-99%), particle size distribution (affects dissolution rate), and moisture content (ideally <5%). Industrial-grade material is sufficient for most applications, while battery-grade requires higher purity and tighter specifications. Suppliers often provide samples for performance testing. Consider ordering smaller trial quantities before large purchases. Lead times vary depending on production schedules, with 2-4 weeks being common for custom formulations. Price negotiations are possible for multi-ton orders.
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