Polyacrylamide, also abbreviated as PAM, is a polymer formed from acrylamide subunits that are usually used as a kind of water treatment chemical. Generally, it has high water absorption and forms a soft gel when it is hydrated. It is used in applications such as polyacrylamide gel electrophoresis. It can also be called a ghost crystal when it is cross-linked so that it is also used in the manufacture of soft contact lenses. When appears in a linear form, it can be used as a thickening and suspending agent. Recently, it has also been used as a subcutaneous filler for facial beauty surgery. So, what exactly are the specialty and applications of this magical chemical? Please let me introduce them to you in the following contents.
Here is the content list:
l The physical and chemical features of PAM.
l What are the applications of PAM?
PAM is a magical kind of chemical since it has two kinds of forms: The linear form and the cross-linked form, and each form of it have a different physical property. The main reason why it is often used as water treatment chemicals is that the linear form of PAM is a highly water-soluble polymer. It is usually a non-ionic polymer, but due to the hydrolysis of some amide groups, they may be converted to carboxyl groups, which gives polyacrylamide weak anionic properties. Based on the different physical properties of it, PAM could be applied to different occasions.
As I have mentioned above, the applications of PAM are various, as a kind of water treatment chemical. The biggest use of polyacrylamide is to flocculate solids in liquids. Such a process is very suitable for water treatment, as well as processes such as papermaking and screen printing. Polyacrylamide can be provided in powder or liquid form, and the liquid form can be subdivided into solution and emulsion polymers. Although these products are often referred to as "polyacrylamide," many are actually copolymers of acrylamide and one or more other chemicals, such as acrylic acid or its salts. The main purpose of the mixing is to make "modified" polymers that have specific ionic properties. Another common use of polyacrylamide and its derivatives is in underground applications, such as enhanced oil recovery. A low-concentration polyacrylamide polymer can be used to generate a high-viscosity aqueous solution, which can be injected to improve the economics of conventional water injection. Also, The ionic form of polyacrylamide has played an important role in the drinking water treatment industry. Trivalent metal salts such as ferric chloride and aluminum chloride are bridged by long polymer chains of polyacrylamide. This leads to a significant increase in the flocculation rate and allows the water treatment plant to greatly improve its ability to remove total organic content from raw water. Therefore, you can see the reason why PAM is often listed as a water treatment chemical: It just too suitable for application in water treating and solution processing.
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