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- Title
МОДИФІКУВАННЯ КЕРАМІЧНИХ МЕМБРАН КАРБОНІЗОВАНИМИ ОРГАНО-НЕОРГАНІЧНИМИ КОМПОЗИТАМИ
- Authors
ГОНЧАРУК, В. В.; ОГЕНКО, В. М.; ДУБРОВІНА, Л. В.; ВИШНЕВСЬКИЙ, О. А.; ДУБРОВІН, І. В.
- Abstract
The tubular ceramic membranes of clay minerals were modified with silica and pyrocarbon, which were obtained by carbonization of organic-inorganic composites at 800 °С in an argon flow. A precursor to carbonization of membrane II (organic-inorganic composite) was formed in the pores of unmodified membranes from liquid glass and the polyisocyanate and sucrose. A precursor to carbonization of the membrane III (organic-inorganic composite) was formed in the pores from liquid glass and the polyisocyanate and aqueous solution of sodium carboxymethylcellulose. The mixture of components for the synthesis of an organic-inorganic composite in membrane III additionally contained an aqueous solution of nickel chloride. As a result of the modification, the membranes became black with a metallic luster. The composition and structure of the membranes were studied by XRF and SEM. The modifier of the membranes is located in the pore space and a mixing of silica and pyrocarbon. Membrane III is additionally modifi ed with metallic nickel. Membrane modifier II is a continuous coating of pore walls and individual particles ranging in size from a few nm to ~ 1 μm. Membrane modifier III is a network of tows and fi lms <0.5 μm, which includes individual agglomerated particles and nickel crystals. The apparent density and open porosity for the unmodified membrane are 1.80 g/cm3 and 40.4 %, for membrane II - 2.13 g/cm3 and 25.3 %, for membrane III - 1.90 g/cm3 and 32.0 %. Testing of modifi ed membranes was carried out on water purification of direct scarlet dye from using the baromembrane method. The concentration of direct scarlet dye in aqueous solutions was 300 mg/dm3. The unmodifi ed membrane does not inhibit direct scarlet dye at all The period of time until the establishment of dynamic equilibrium in systems during water purification is 2h. The testing of modifi ed membranes showed that the membranes have ultrafi ltration properties. The retention factor (R) aft er 2 hours at a working pressure of 0.7 MPa is 100 %. The specifi c productivity (Jv) in this case is 25 (membrane II) and 34 (membrane III) dm3/(m2•h).
- Subjects
WATER purification; SODIUM carboxymethyl cellulose; RF values (Chromatography); CLAY minerals; AQUEOUS solutions; SOLUBLE glass
- Publication
Polymer Journal / Polymernyi Zhurnal (18181724), 2020, Vol 42, Issue 2, p96
- ISSN
1818-1724
- Publication type
Article
- DOI
10.15407/polymerj.42.02.096