Polyacrylamide PAM is a widely used water-soluble polymer with good flocculation, thickening, drag reduction and surface activity properties, and is widely used in water treatment, oil drilling, papermaking, textile, pharmaceutical and other fields. The solubility of polyacrylamide PAM is one of the important properties of its application, and in general, PAM can be soluble in water in various percentages.
The dissolution process of polyacrylamide PAM needs to go through the following steps: first, the PAM particles are added to the water, because the PAM molecule contains a large number of amide groups, and the hydrogen bonding force between these groups is strong, so that the PAM particles are gradually dispersed in the water. Secondly, as the stirring progresses, the PAM molecular chain gradually expands and adsorbs a large number of water molecules to form a dissolved state. In this process, the solubility of PAM is affected by a variety of factors, such as temperature, stirring speed, water quality, etc.
The solubility of polyacrylamide PAM is related to its molecular weight, molecular weight distribution, particle size and shape. In general, the higher the molecular weight and the narrower the molecular weight distribution, the lower the solubility of PAM. In addition, the solubility of PAM is also affected by temperature, and as the temperature increases, the solubility of PAM also increases accordingly. In terms of stirring speed, an appropriate stirring speed can promote the dissolution of PAM, but too high stirring speed may cause damage to the PAM molecular chain and affect its performance.
In addition to the above factors, water quality is also one of the key factors affecting the solubility of polyacrylamide PAM. Factors such as ion concentration, pH, hardness and other factors in water will affect the solubility of PAM. For example, water with a high ionic concentration will reduce the solubility of PAM, while water with a low pH and low hardness will facilitate the solubility of PAM.
In practical application, in order to improve the solubility of polyacrylamide PAM, the following measures can be taken: first, select the appropriate molecular weight and molecular weight distribution of the PAM product;Second, control the appropriate stirring speed and time;Finally, adjust the amount and use of PAM according to the water quality situation.