Inverse Emulsion Of. Of Pdmdaac-am Copolymer Research

PDMDAAC—AM with high solid content and high molecular weight was synthesized in inverse emulsion polymerization using Acylamide (AM) and DimethylDiallylAmmoniumChloride (DMDAAC). In the investigation of polymerization, the effects of emulsifier. initiator, the monomer content and other factors on the viscosity and conversion efficiency of the copolymerization were researched. The results show that there was an optimum value at the amount of emulsifier, the amount of initiator, the monomer content and initiation temperature. When DMDAAC/AM=2:8 , oil/water=3:7 , emulsifier=8% and K₂S₂O₈% (as initiator) =0.05%, initiate temperature=45℃, product with high solid content(>50%) and 800.5 cm³/g viscosity was got at. The structure of the polymer and the surface shape of the solid product were studied by means of various instrumental analysis techniques, including IR, Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) et al. The dehydration property of PDMDAAC-AM for activated sludge was studied using different cationicity and different molecular weight PDMDAAC—AM. The results show that PDMDAAC—AM has a good dehydration property for activated sludge, the larger the cationicity and molecular weight are, the better dehydration performance the PDMDAAC—AM has. In the last part of experiments, the flocculation efficiency of PDMDAAC—AM for kaolinite suspension, dye liquor, dyeing wastewater, oil refinery effluent and Yellow river water and the flocculation efficiency of PDMDAAC—AM were studied by jar test. The experimental results show that the cationicity, the molecular weight and the structure have a great effect on the flocculation efficiency of PDMDAAC—AM. In general, the larger the cationicity and molecular weight are, the better flocculation performance the PDMDAAC—AM has. The cationicity has a better effect on turbidity and color removal , molecular weight has a greater effect on oil removal. Using PDMDAAC — AM as flocculants with PAC , not only enhances flocculation performance, but also can reduce the water treatment cost. PDMDAAC—AM flocculates in water by charge neutralization and adsorption bridging mechanism. The experimental results show that PDMDAC-AM is organic cationic polymer flocculants with high performance and multi-function.