Controlling the barrier properties of polymer composites containing montmorillonite

Avagimova, N. V.; Pulyalina, Alexandra; Тойкка, А. М.; Suvorova, Olga; Vilesov, A. D.; Polotskaya, G. A.

doi:10.1134/s0965544113080045

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…To improve gas transport properties, PPO has been modified by silica, silane, fullerene, carbon nanotubes, and other nanoparticles [27][28][29][30][31]. The modern methods of membrane technologies that allow to determine the permeability of polymer materials to gases and liquids can be used for estimating the barrier properties of envelopes and coatings of various products [32][33][34]. Study of gas permeability is an important step in the development of new polymer materials and composites for different applications.…”

Section: Introductionmentioning

confidence: 99%

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Polotskaya¹,

Avagimova²,

Тойкка

et al. 2017

Polymer Composites

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Considerable progress in the development of new materials is achieved due to the modification of polymer materials by carbon nanoparticles of various kinds. In this work new composites of nanodiamonds (ND) and poly (phenylene oxide) (PPO) were prepared by solid phase dispersing. Their solutions and dense nonporous films were studied by different techniques. The structure of the PPO/ND composites was examined by atomic force microscopy, dynamic light scattering, and birefringence. The increase of ND content in the film leads to a more complex structure because of accumulation of aggregates containing ND particles and PPO molecules. The physical and mechanical properties were exhaustively evaluated by measuring intrinsic viscosity, density, surface tension, the Young's modulus, yield stress, tensile strength, and ultimate strain. Gas transport properties were determined by measuring H2, CO2, N2, CH4, and O2 permeation. The gas permeability coefficients decrease slightly with an increase of the ND content in composites, but the ideal selectivity of gas separation increases at the same time. POLYM. COMPOS., 39:3952–3961, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Polotskaya¹,

Avagimova²,

Тойкка

et al. 2017

Polymer Composites

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“…For nonsymmetrical PAI/Per membranes, transport properties were studied in the pervaporation of a two-component ethanol-ethyl acetate mixture. Separation of this mixture may be of independent interest since these liquids form an azeotropic mixture of 26 wt.% ethanol and 74 wt.% ethyl acetate [25].…”

Section: Transport Propertiesmentioning

confidence: 99%

“…However, there is no data on the use of perovskites as modifiers for polymer membranes for pervaporation. Perovskite-type layered oxides seem promising materials for incorporation into membranes due to combination of two factors: (i) the possibility of creating selective transport channels through the interlayer space of the perovskite structure-the presence of ionic compounds in the polymer matrix leads to an increase in the solubility of polar molecules and a decrease in the solubility of nonpolar media, and (ii) the possibility of increasing the distance between polymer chains, which should increase the permeability of the membranes due to the frame of inorganic materials that can prevent the tight packing of polymer chains [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Specific Structure and Properties of Composite Membranes Based on the Torlon® (Polyamide-imide)/Layered Perovskite Oxide

et al. 2020

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The use of perovskite-type layered oxide K2La2Ti3O10 (Per) as a modifier of the Torlon® polyamide-imide (PAI) membrane has led to the formation of an specific structure of a dense nonsymmetrical film, namely, a thin perovskite-enriched layer (3–5 μm) combined with the polymer matrix (~30 μm). The PAI/Per membrane structure was studied by SEM in combination with energy dispersive microanalysis of the elemental composition which illustrated different compositions of top and bottom surfaces of the perovskite-containing membranes. Measurement of water and alcohol contact angles and calculation of surface tension revealed hydrophilization of the membrane surface enriched with perovskite. The transport properties of the nonsymmetrical PAI/Per membranes were studied in the pervaporation of ethanol‒ethyl acetate mixture. The inclusion of 2 wt.% Per in the PAI gives a membrane with a high separation factor and increased total flux.

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“…Many publications were related to block copolymer-based nanocomposites with tailored dispersion of nanofillers [6][7][8][9]. Montmorillonite (MMT), known as clay, is toxicologically safe nanofiller with layered silicates structure [10], while can bring a remarkable improvement in physical, mechanical [11] and barrier properties [12][13][14] of most polymers, even at very low concentration. Like other nanofiller, such as grapheme [15], carbon nanotube [16], the state of exfoliation, concentration and orientation of nanoclay, as well as the structure of polymer matrix are believed to be the key factor in achieving optimum properties of the nanocomposites [17,18].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a long-alkyl-chain silane grafted organic montmorillonite and its nanocomposite with SEBS

Zhou

Shi

et al. 2016

Polym. Bull.

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In this study, a modified montmorillonite (W-H-OMMT) was prepared by intercalating pristine montmorillonite using a phosphorus salt and a subsequent grafting using a long-alkyl-chain silane, and the nanocomposites with poly[styrene-(ethylene-co-butylene)-styrene] (SEBS) were prepared by melt blending. The pristine and the modified MMT were characterized by XRD, FT-IR, XPS and SEM. The morphology of the SEBS nanocomposites was studied using XRD, SEM and TEM, and the results can be correlated well with transparency, color, surface contact angle, rheological behavior, thermal and mechanical properties of the nanocomposites. As compared with pristine and the modified clay, more uniform dispersion and improved compatibility are observed for the W-H-OMMT in the SEBS matrix, resulting in better transparency and more hydrophobic surface for the SEBS/W-H-OMMT nanocomposite. Better thermal stability, a synergetic effect in tensile strength and elongation at break were observed, which can be attributed to well dispersion of the W-H-OMMT, as well as perfect adhesion between the W-H-OMMT and the SEBS matrix from the enhanced molecular interaction between the long-alkyl chain and the SEBS molecules. Compared to pure SEBS, the strength and elongation of SEBS/W-H-OMMT nanocomposite increased by 8.5 and 7.6 %; meanwhile, the water contact angel and the 50 % weight loss temperature increased by 5.3 and 13.1 %, respectively. Appropriate silane grafted organic montmorillonite provided an efficient way for the overall performance improvement of SEBS.

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Controlling the barrier properties of polymer composites containing montmorillonite

Cited by 7 publications

References 13 publications

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Optical, mechanical, and transport studies of nanodiamonds/poly(phenylene oxide) composites

Specific Structure and Properties of Composite Membranes Based on the Torlon® (Polyamide-imide)/Layered Perovskite Oxide

Preparation of a long-alkyl-chain silane grafted organic montmorillonite and its nanocomposite with SEBS

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