Polyacrylamide anion is a kind of polymer compound, which is widely used in many fields, such as water treatment and sedimentation agents. This paper mainly expounds the polyacrylamide anion in detail from the three aspects of structure, nature and use.

1. Structure of polyacrylamide anion
Polyacrylamide anion is a polymer formed by polymerization of acrylamide monomers, in which a portion of the amino hydroxyl group on the acrylamide monomers is replaced by a carboxyl group to form an anionic polyacrylamide.Its molecular formula is (C3H5NO) n, where n is the degree of polymerization, and the conditions of the polymerization reaction can be controlled to control the degree of polymerization.Polyacrylamide anion has a long-chain molecular structure and tens of millions of functional groups, which makes it have a strong adsorption effect and large molecular weight agglomeration ability.

In addition, polyacrylamide anions can also form complexes with cationic polymers to enhance sedimentation, filtration and purification effects.This structural change is essential for its application in the water treatment and sedimentation agent industry.

2. Properties of polyacrylamide anion
The properties of polyacrylamide anions are mainly related to their structure.It is a colorless or light yellow transparent or translucent granular or powdered solid, soluble in water and organic solvents, and has strong water absorption.It has strong surface activity, can reduce the surface tension of water and change the physical properties of water bodies, so it is widely used in the field of sedimentation agents and water treatment.

In addition, due to the long-chain molecular structure of the polyacrylamide anion and the presence of a carboxyl functional group, it also has excellent adsorption capacity.In the field of environmental pollution control, polyacrylamide anions are often used to adsorb pollutants, purify the environment, and achieve the purpose of pollution control.

3. Application of polyacrylamide anion
Polyacrylamide anions are widely used in water treatment, environmental pollution control, pulp and paper making, textile additives, sedimentation agents and other fields.

In water treatment, polyacrylamide anion can be used as a purifying agent, flocculant, sedimentation agent and filter agent, which has the advantages of simple structure, low price, stable performance and significant effect.

In the field of environmental pollution control, polyacrylamide anions are often used to adsorb pollutants and achieve the purpose of purifying the environment.It can also be used as a viscosity enhancer and improver during water injection in oil fields, and can also be used in the field of pulp and paper making as a pulp fixing agent and suspension separator.