Nanocomposite membrane films on the basis of ether of cellulose and tetraethoxysilan

Суворова, А. И.; Суворов, А. Л.; Иваненко, М. В.; Shishkin, E. I.

doi:10.1134/s199507800901011x

Cited by 5 publications

(12 citation statements)

References 13 publications

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“…Organic-inorganic EC films were prepared via the sol gel method at 50°C according to the procedure described in [14]. The ratio between alkoxide and the EC chain unit was varied from 1 : 1 to 4 : 1 (mol/mol) because, at larger amounts of alkoxides, brittle films were obtained.…”

Section: Objects and Analytical Methodsmentioning

confidence: 99%

“…The ratio between alkoxide and the EC chain unit was varied from 1 : 1 to 4 : 1 (mol/mol) because, at larger amounts of alkoxides, brittle films were obtained. During the synthesis, hydrochloric acid (0.15 moles per mole of alkoxide [14,17]) was used as a catalyst. The hydrolyzing agent was deion ized water, which was added to the THF solution of EC and alkoxide in an amount of 6 moles per mole of TEOS or 3 moles per mole of TTB because, in an acidic medium, the excess of water may facilitate rapid hydrolysis of TTB to form titanium dioxide [18].…”

Section: Objects and Analytical Methodsmentioning

confidence: 99%

“…Widening the scope of polymers for the design of materials useful for purification of colored aqueous outflows of textile, printing, paper, and other industries using dyes is still an urgent problem [13]. As was shown in [14,15], Si containing organic-inorganic hybrid films show activity in the separation of water and organic solvents [14,15]. The use of hybrid polymer films with nano sized inorganic structural modifiers for the removal of organic compounds, including dyes, from aqueous solutions is of interest not only from the ecological…”

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confidence: 99%

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Preparation and properties of silicon- and titanium-containing hybrid nanocomposite films based on ethyl cellulose

et al. 2013

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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 (tetra ethoxysilane 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 alkox ides 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.

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Section: Objects and Analytical Methodsmentioning

confidence: 99%

Section: Objects and Analytical Methodsmentioning

confidence: 99%

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confidence: 99%

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Preparation and properties of silicon- and titanium-containing hybrid nanocomposite films based on ethyl cellulose

et al. 2013

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“…For an example of films obtained by the sol-gel method with the use of different polymers and containing oxides, it has been shown [8,[12][13][14] that with an increase of the content of the latter, when the organo inorganic network becomes more dense, the degree of film swelling declines. The kinetic curves of the hybrid film swelling have the form typical of restrictedly swelling polymer systems, which network polymers are assigned to.…”

Section: The Behavior Of Hybrid Films In Aqueous Organic Mediamentioning

confidence: 99%

“…On the surface of hybrid films obtained with the use of different polymers [8,13,14], a nanosized rough ness was detected by the AFM method which is absent in films of the individual polymers. The dimension of the nanosized formations on the surface depended on the oxide nature and it was larger for films containing titania.…”

Section: Structure Of Hybrid Polymer-oxide Filmsmentioning

confidence: 99%

Polymer organic-inorganic materials for membrane technology, their characteristics and properties

Суворова¹,

Tyukova²,

Суворов

2011

Glass Phys Chem

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Organo inorganic nanocomposite glassy films are obtained by the sol-gel method via hydrolytic polycondensation reactions of silicon and titanium alkoxides in solutions of polymers of different chemical compositions. The polymer structure and interaction with oxides in the films are investigated by FTIR spec troscopy, atomic force microscopy, using a particle size analyzer and a number of physicochemical methods. The presence of nanosized (from ~20 to 370 nm) particles of the oxides in the structure of hybrid films is con firmed. It is shown that the best practically useful properties are exhibited by the composite films with strong organo inorganic polymer-oxide networks. Such films may be used for creating membranes and sorbents for water purification from harmful organic and ionic admixtures.

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Thermodimics of adsorbtion of heptane molecules by hybrid bionanocomposite diacetatecellulose-silica

Yarkulov,

Sobitov,

Umarov

et al. 2024

Problems in the Textile and Light Industry in the Context of Integration of Science and Industry and Ways to Solve Them: Ptlici

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Nanocomposite membrane films on the basis of ether of cellulose and tetraethoxysilan

Cited by 5 publications

References 13 publications

Preparation and properties of silicon- and titanium-containing hybrid nanocomposite films based on ethyl cellulose

Preparation and properties of silicon- and titanium-containing hybrid nanocomposite films based on ethyl cellulose

Polymer organic-inorganic materials for membrane technology, their characteristics and properties

Thermodimics of adsorbtion of heptane molecules by hybrid bionanocomposite diacetatecellulose-silica

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