Sinofloc Chemical

Solubility of Anionic Polyacrylamide

1. Solubility of anionic polyacrylamide

Anionic polyacrylamide is easily soluble in cold water, and the relative molecular weight has little effect on its insolubility. However, when the concentration of pam polyacrylamide with high relative molecular weight exceeds 10%, it will form a gel-like structure. The increase in temperature can slightly promote dissolution, but the dissolution temperature should not exceed 50 degrees Celsius to prevent molecular degradation. In order to obtain good water dispersibility, commercial polyacrylamide anionic is preferably made into flakes and granules.

If the anionic polyacrylamide is first dispersed in the water-soluble alcohol, and then added to the water with stirring, the dissolution rate will be greatly accelerated. The dissolution rate of anionic pam polyacrylamide in water is not affected by pH value. But for partially hydrolyzed products, if the pH value is alkaline, the dissolution rate will increase slightly. When the pH value is greater than 10.5, the pam polyacrylamide will be hydrolyzed. Dilute solutions of unhydrolyzed pam polyacrylamide are unaffected by most inorganic salts. However, high-value salts will precipitate polyacrylamide anionic with a degree of hydrolysis of 45%, because high-valent metal salts and hydroxyl groups will form water-insoluble salts.

2. The solubility of anionic polyacrylamide in organic solvents is limited

Certain compounds, such as ethylene glycol, glycerol, morpholine, propylene glycol, and alcohol-ethylene oxide adducts, have effective solvating effects on it, acting as plasticizers for polymers. It is insoluble in most non-polar organic solvents, as well as in acetone and methanol. You can purify pam polyacrylamide by precipitation in methanol or acetone. The impurities can be removed by washing the pam polyacrylamide with methanol or acetone containing 20%-30% water.

Now, environmental protection has become the main trend of the times, and green has become a new fashion. Vigorously developing energy conservation and emission reduction in the building materials industry will achieve energy conservation and environmental protection and fully reflect the people-oriented concept. The development of pam polyacrylamide in water treatment has promoted the optimization and upgrading of the building materials industry and set a model for green development. In the future, SINOFLOC, as one of the leading anionic polyacrylamide suppliers, will take the new environmental protection technology as the leader and technological innovation as the driving force, devote ourselves to the research and development and production of anionic polyacrylamide equipment, and further promote the development of energy saving and environmental protection work and the healthy development of the green building materials industry.

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