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Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)n. It is a hard glassy solid at room temperature. Its products include glue, latex, white powder, translucent beads and flakes, etc. Good thermal stability. It can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid. After long-term storage, the viscosity of the solution will decrease due to the slow degradation of the polymer, especially when the storage and transportation conditions are poor. [1] Polyacrylamide is used as a lubricant, suspending agent, clay stabilizer, oil displacing agent, water loss reducing agent and thickener in drilling, acidification, fracturing, water plugging, cementing and secondary and tertiary oil recovery. It is widely used in oilfield chemicals and is an extremely important oilfield chemical.
Papermaking field
Polyacrylamide is widely used in the papermaking field as retention aids, filter aids, leveling agents, etc. to improve paper quality, slurry dehydration performance, retention of fine fibers and fillers, and reduce raw material consumption and environmental pollution. Used as a dispersant to improve paper uniformity. Polyacrylamide is mainly used in two aspects in the paper industry. One is to increase the retention rate of fillers, pigments, etc. to reduce the loss of raw materials and environmental pollution; the other is to improve the strength of paper. Adding polyacrylamide to the paper stock can improve the retention rate of fine fibers and filler particles on the web and accelerate the dehydration of the paper stock. The mechanism of action of polyacrylamide is that the particles in the slurry are flocculated and retained on the filter cloth through electrical neutralization or bridging. The formation of floc can also make the water in the slurry easier to filter out, reducing the loss of fiber in white water, reducing environmental pollution, and improving the efficiency of filtration and sedimentation equipment.
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