Inverse Microemulsion Method Of Synthesis Of Cationic And Amphoteric Polyacrylamide

With the social progress and industrial development, Functional polyacrylamide (PAM) is the material of research one of the hotspots in recently year. Polyacrylamide is a multi-functional water soluble macromolecule material, and widely used in water Processing, mining, Petroleum-drilling, Papermaking, leather, fluid transportation, sewage treatment and other fields. Copolymerizes cationic polyacrylamide and amphoteric polyacrylamide by inverse emulsion copolymerization in this paper, and study suitable for the flocculant the technology conditions of use. On the base of makes experiments on the conditions for copolymerization of cationic polyacrylamide and amphoteric polyacrylamide, and screened performance better flocculant agents.The first part of this paper firstly synthesis of cationic monomer N, N-(dimethyl amino) methyl acrylamide with Mannich reaction, Discusses the synthetic technology of hydroxyl methyl, when formaldehyde and dimethylamine (Moore than) for1.2:1, reaction temperature for50℃, the reaction time of2h, was the highest yield; And the structures were characterized by IR。Secondly studied in Inverse microemulsion polymerization synthesis cationic polyacrylamide. according to Radical polymerization principle by using the theory of composite initiator system, acrylamide monomer and N, N-(dimethyl amino) methyl acrylamide for free radicals copolymerization reaction, studies the monomer concentration, reaction temperature, initiating, emulsifier on the polymerization reaction influence. The results of the study show that, when monomer mass fraction was50%, the initiator (initiator quality/solution total quality) was0.95%, emulsifier was17.3%, and the reaction temperature was30℃, Synthesis of cationic polyacrylamide molecular weight is the highest.The second part of this paper presented the synthesis of Amphoteric Polyacrylamide by reverse microemulsion polymerization. The influence of organic phase, emulsifier, hydrophile-lipophile balance (HLB), and pH was investigated. The copolymer synthesized in this paper was applied as flocculant agent. Comparing with commercial flocculant agents, it had wider range of applications, lower cost, more stable and was as good as similar foreign products.