Titanium Dioxide Floculation by Magnetic Nanocomposites Based оn Magnetite Nanoparticles and Statistical Copolymers of Acrylamide with Dimethylaminoethyl Methacrylate Hydrochloride

• Published in: Russian journal of applied chemistry 2022-09, Vol.95 (9), p.1387-1393
• Main Authors: Proskurina, V. E., Kashina, E. S., Rakhmatullina, A. P.
• Format: Article
• Language: English
• Subjects: Acrylamide; Chemical synthesis; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Copolymers; Ferric chloride; Flocculants; Flocculation; Industrial Chemistry/Chemical Engineering; Inorganic Synthesis and Industrial Inorganic Chemistry; Iron chlorides; Macromolecules; Magnetite; Nanocomposites; Nanoparticles; Phase separation; Photon correlation spectroscopy; System effectiveness; Titanium dioxide
• ISSN: 1070-4272; 1608-3296
• DOI: 10.1134/S1070427222090142

Magnetic flocculants based on magnetite nanoparticles and statistical copolymers of acrylamide with dimethylaminoethyl methacrylate hydrochloride, differing in the content of ionogenic links and molecular mass, were synthesized. The FeCl 2 and FeCl 3 co-precipitation method yielded magnetite samples, differing in the average nanoparticles size, which were then modified acrylamide cationic copolymers. Individual magnetite particles, copolymers, and magnetic flocculants obtained by modification of copolymers with magnetite were characterized by the dynamic light scattering method. The influence of the magnetite nanoparticle size and ionogenic link content of the magnetic flocculant magnetic component on the TiO 2 suspension flocculation process has been estimated. The predominantly neutralizing flocculation mechanism is evidenced by the opposite sign of the TiO 2 charge particles and the macromolecules of the flocculating agents. It is shown that using magnetite characterized by a particle size of 70 nm can be obtained a highly effective multifunctional flocculant for phase separation of disperse systems.