Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27336
Title: Preparation and properties of silicon- and titanium-containing hybrid nanocomposite films based on ethyl cellulose
Authors: Suvorova, A. I.
Sharafeeva, A. R.
Suvorov, A. L.
Tyukova, I. S.
Lirova, B. I.
Issue Date: 2013
Citation: Preparation and properties of silicon- and titanium-containing hybrid nanocomposite films based on ethyl cellulose / A. I. Suvorova, A. R. Sharafeeva, A. L. Suvorov [et al.] // Polymer Science - Series A. — 2013. — Vol. 55. — № 7. — P. 438-445.
Abstract: Nanocomposite hybrid films containing silicon and titanium compounds in the polymer matrix are prepared through the sol-gel method via the hydrolytic polycondensation of Si and Ti alkoxides (tetraethoxysilane and titanium tetrabutoxide) in the THF solution of a hydrophobic polymer, ethyl cellulose. Their structure and properties are studied with the use of a complex of physicochemical methods. During the hydrolysis of tetraethoxysilane and the subsequent polycondensation of the reaction products, silicon atoms are incorporated into the polymer and form -O-Si-O-bonds involving hydroxyl groups of ethyl cellulose. In the sol-gel method, titanium alkoxide yields nanosized particles of titanium dioxide that play the role of fillers in the polymer matrix. Titanium-containing films show solubility in THF and, after prolonged contact with the solvent, precipitate titanium dioxide from the solution. Hybrid films containing silicon are insoluble owing to the formation of a chemical network between polymer molecules and Si-OH groups of the products of hydrolysis of silicon alkoxide, as confirmed by the IR data. It is shown that the amounts and types of alkoxides and the diameters of the structures formed in the polymer matrix via the sol-gel procedure affect the hydrophilicity levels of ethyl cellulose hybrid films and their abilities to swell in water and aqueous solutions of organic dyes (brilliant blue and methylene blue). Ethyl cellulose hybrid films are hydrophilic, and they facilitate the removal of dye molecules from aqueous solutions. The best properties are featured by the films containing nanosized particles of titanium dioxide in the polymer matrix. © 2013 Pleiades Publishing, Ltd.
Keywords: HYBRID NANOCOMPOSITES
HYDROLYTIC POLYCONDENSATION
HYDROPHOBIC POLYMERS
NANO-SIZED PARTICLES
PHYSICOCHEMICAL METHODS
PREPARATION AND PROPERTIES
STRUCTURE AND PROPERTIES
TITANIUM TETRABUTOXIDE
AROMATIC COMPOUNDS
COMPLEX NETWORKS
FILM PREPARATION
HYDROLYSIS
HYDROPHILICITY
MOLECULES
NANOCOMPOSITE FILMS
NANOSTRUCTURED MATERIALS
ORGANIC SOLVENTS
OXIDES
POLYCONDENSATION
POLYMER FILMS
POLYMER MATRIX
SOL-GEL PROCESS
SOL-GELS
TITANIUM
TITANIUM DIOXIDE
SILICON
URI: http://hdl.handle.net/10995/27336
SCOPUS ID: 84880408814
WOS ID: 000321789500002
PURE ID: 900136
ISSN: 0965-545X
DOI: 10.1134/S0965545X13070043
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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