Polyacrylamide is abbreviated as PAM, its scientific name is polyacrylamide, also known as No.3 coagulant. It is a linear water-soluble polymer with a molecular weight of 3-18 million. The appearance is white powder or colorless viscous colloid, odorless , Neutral, soluble in water, easy to decompose when the temperature exceeds 120℃.
Polyacrylamide (PAM) is a general term for polymers obtained by homopolymerization or copolymerization of acrylamide monomers under the action of initiators. It is one of the most widely used varieties of water-soluble polymer materials. It is mainly used in petroleum exploration, water treatment, and In textile, papermaking, mineral processing, medicine, agriculture and other industries, it is known as "Auxiliary Agents for All Industries".
Features:
1) Flocculation: PAM can neutralize suspended substances through electricity, bridging and adsorbing, and flocculate.
2) Adhesiveness: It can play the role of adhesion through mechanical, physical and chemical action.
3) Resistance reduction: PAM can effectively reduce the frictional resistance of the fluid. Adding a small amount of PAM in the water can reduce the resistance by 50-80%.
4) Thickening: PAM has a thickening effect under neutral and acidic conditions. When the PH value is above 10, PAM is easily hydrolyzed and has a semi-network structure, the thickening will be more obvious.
Principle introduction:
1) The principle of flocculation: When PAM is used for flocculation, it is related to the surface properties of the flocculated material, especially the dynamic potential, viscosity, turbidity and the pH value of the suspension. The dynamic potential on the surface of the particles is the reason why the particles prevent aggregation. PAMs with opposite surface charges can condense by reducing their fast-moving potential.
2) Adsorption and bridging: PAM molecular chains are fixed on the surface of different particles, and polymer bridges are formed between the particles, so that the particles form aggregates and settle.
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