poly(allylamine hydrochloride)

Poly(allylamine hydrochloride) (PAH) is a water-soluble, cationic polyelectrolyte that is commonly used in various applications such as water treatment, biomedical engineering, and drug delivery systems. PAH is a polymer made up of monomers of allylamine that have been hydrochlorinated. It has a molecular weight range of 15,000-400,000 Da, with a degree of polymerization ranging from 100 to 1,000. In water treatment, PAH is used as a flocculant to remove impurities from water. It can be used as a coagulant aid, where it helps to destabilize suspended particles in water and form larger flocs that can be more easily removed. PAH is also used in biomedical engineering as a scaffold material for tissue engineering, due to its ability to promote cell growth and attachment. Additionally, PAH is used in drug delivery systems, where it can be used to bind and deliver drugs to targeted areas of the body. Chemically, PAH is a strongly cationic polymer due to the presence of the amine groups on its backbone. It has a pH-dependent charge, where it is positively charged at low pH values and neutral at high pH values. The positively charged amine groups on PAH allow it to interact with negatively charged surfaces or substances, making it useful in various applications. Overall, PAH is a versatile and useful polymer with a wide range of applications in many industries.