Key words: impregnation, ultra high density polyethylene, amoxicillin, subcritical freon R22
Because of investigation the method of impregnation of ultra high density polyethylene
(UHDPE) with amoxicillin in subcritical freon R22 was developed. For the first time
a possibility of polymer, impregnation with polar substance in the absence of modifier
was demonstrated. Usually removal of modifiers from polymer matrix is a serious problem.
Amoxicillin desorption curves (drug release) were calculated using HPLC method.
Polymer samples impregnated with amoxicillin manifested antibacterial activities in
relation to gram-positive and gram-negative microorganisms S. aureus, S. epidermidis,
E. faecalis, B. subtilis, E. coli, that provides a perspective for using them as real models of
implants for bone replacement.
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Impregnation of Ultra High Density Polyethylene with Amoxicillin in Subcritical Freon Media / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 4-14. - DOI:
TRANSLIT
Impregnaciya sverhvysokomolekulyarnogo polietilena amoksicillinom v srede subkriticheskogo freona R22 / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 4-14. - DOI:
En
Impregnation of Ultra High Density Polyethylene with Amoxicillin in Subcritical Freon Media. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 4-14 (2017). https://doi.org/
Key words: synthesis in supercritical conditions, acetylacetone, mixed Ce-Zr oxides, dry reforming of methane
The paper considers the effect of zirconium starting compounds on the properties of
mixed Ce-Zr oxides synthesized by solvothermal method in a flow reactor using ethanol
and isopropanol as a supercritical media. Phase composition and structural properties
of synthesized samples were investigated by X-ray diffraction and Raman spectroscopy.
The morphology and textural properties were studied by transmission electron
microscopy and thermal desorption of nitrogen. If zirconium oxychloride or acetate
are used, the formation of mixtures of phases enriched in cerium or zirconium is
observed, whereas in the case of zirconium butoxide added with a complexing agent
(acetylacetone) a homogeneous solid solution is formed. The comparison of catalytic
properties of synthesized oxides with supported Ni in the reaction of methane dry
reforming demonstrated that the catalyst based on the single-phase mixed ceria-zirconia
oxide is significantly more active, selective and stable to coking.
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7.0.100-2018
Synthesis of Ce1-xZrxO2 Oxides in Supercritical Alcohols and Based on Them Catalysts for Carbon Dioxide Reforming of Methane / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 15-28. - DOI:
TRANSLIT
Sintez oksidov Ce1-xZrxO2 v sverhkriticheskih spirtah i katalizatorov dlya uglekislotnoj konversii metana na ih osnove / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 15-28. - DOI:
En
Synthesis of Ce1-xZrxO2 Oxides in Supercritical Alcohols and Based on Them Catalysts for Carbon Dioxide Reforming of Methane. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 15-28 (2017). https://doi.org/
Key words: propiconazole, supercritical CO2, solubility, wood, drying, impregnation
Drying of wood in the supercritical (SC) CO2 and SC-CO2 added with ethanol (5%)
media at 323, 343 and 353 K and 10, 20 and 30 MPa is studied. During the first drying
cycle 40—87% of the initial moisture can be removed from the material. The number
of cracks in the wood can be reduced by prolongation of the decompression stage of
the drying process. Solubility of propiconazole in SC-CO2 is studied using a dynamic
method. Its high saturation concentrations — (3—5)⋅10-3 mole per mole of СО2 —
indicate that potentially SC-CO2 can be considered as a candidate solvent for
impregnation of wood with propiconazole. It is demonstrated that through impregnation
of wood samples can be achieved, and the efficiency of impregnation increases at
increased duration of the process.
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7.0.100-2018
Wood Drying and Impregnation with Propiconazole Using Supercritical Carbon Dioxide / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 29-40. - DOI:
TRANSLIT
Sushka i impregnaciya drevesiny propikonazolom s ispol'zovaniem sverhkriticheskogo SO2 / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 29-40. - DOI:
En
Wood Drying and Impregnation with Propiconazole Using Supercritical Carbon Dioxide. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 29-40 (2017). https://doi.org/
Key words: supercritical fluid extraction, secondary lichen metabolites, usnic acid, Cladonia lichen genus, parameters of the extraction process
The process of supercritical fluid extraction (SFE) of secondary metabolites from
Cladonia genus lichen with carbon dioxide is studied. The solid extract yield obtained
via carbon dioxide extraction exceeds by far that obtained via acetone extraction in a
Soxhlet apparatus. The maximum content of the target component — usnic acid — in
the extract (91 %, yield — 2.5% of absolutely dry material) is obtained at 35 MPa, 40 °C
and the SFE process duration 40 minutes. The product yield can be increased to 3% by
the addition of co-solvents (acetone, ethanol, methylene chloride) to carbon dioxide.
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7.0.100-2018
Supercritical Fluid Extraction of Usnic Acid from Cladonia Genus Lichen / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 41-49. - DOI:
TRANSLIT
Sverhkriticheskaya flyuidnaya ekstrakciya usninovoj kisloty iz lishajnika roda Cladonia / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 41-49. - DOI:
En
Supercritical Fluid Extraction of Usnic Acid from Cladonia Genus Lichen. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 41-49 (2017). https://doi.org/
Key words: paracetamol, supercritical CO2, phase equilibrium, solubility, heat capacity, dispersing using SEDS method
Solubility of paracetamol in supercritical carbon dioxide and its mixtures with acetone
is experimentally studied. Isobaric heat capacities of paracetamol and «paracetamol —
SC—CO2», «paracetamol — acetone — SC—CO2» systems at 303—523 K and 7—29 MPa
are measured. The results of paracetamol dispersing using the SEDS (Solution Enhanced
Dispersion by Supercritical Fluids) method are presented.
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7.0.100-2018
Some Thermodynamic Characteristics of Paracetamol Dispersing Using the SEDS Method / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 50-68. - DOI:
TRANSLIT
Nekotorye termodinamicheskie harakteristiki processa dispergirovaniya paracetamola po metodu SEDS / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 50-68. - DOI:
En
Some Thermodynamic Characteristics of Paracetamol Dispersing Using the SEDS Method. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 50-68 (2017). https://doi.org/
Key words: ternary water-salts systems, supercritical phase equilibria, phase diagrams
Supercritical phase equilibria in ternary system K2SO4—KOH—H2O at 420—500 °C
and up to 130 MPa pressure with binary boundary subsystems of different types are
studied. The binary subsystem of type 1 do not have any critical phenomena in saturated
(l = g — s) aqueous solution as well as the immiscibility equilibrium (l1—l2) (КОН—Н2O),
the second binary subsystem of type 2 (K2SO4—H2O) has two critical end-points
p (g = l — sK2SO4) and Q (l1 = l2—sK2SO4)
with saturated aqueous solution and the liquid-liquid
immiscibility equilibria. The ternary system has two three-phase equilibria
(g — l — sK2SO4) and (l1 — l2 — sNa2SO4),
separated by a two-phase supercritical fluid region
(fl—sK2SO4) and two types of monovariant critical curves
(g = l — sK2SO4) and (l1 = l2 — sK2SO4).
The three?phase regions approach each other at temperature increased up to the
point where the two-phase supercritical equilibrium disappeares, and the two mentioned
monovariant critical curves are joined into a double homogeneous critical point
(g = l — s ↔ l1 = l2 — s)
at maximum temperature ∼ 445 °C and 51—52 MPa.
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7.0.100-2018
Solubility and Critical Phenomena in Ternary Aqueous Solutions, Containing the Salt of the Type 2 and Alkali / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 69-79. - DOI:
TRANSLIT
Pastvorimost' i kriticheskie yavleniya v trojnyh vodnyh rastvorah, soderzhashchih sol' vtorogo tipa i shcheloch' / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 69-79. - DOI:
En
Solubility and Critical Phenomena in Ternary Aqueous Solutions, Containing the Salt of the Type 2 and Alkali. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 69-79 (2017). https://doi.org/
Key words: oil shale, supercritical water, even/odd ratio, alkanes, alkenes, polyaromatic hydrocarbons, benzo- and dibenzothiophenes
The composition of oily fractions (OFs) formed by the Kashpir oil shale conversion
in a flow of water vapor and supercritical water under uniform heating from 300 to
550 °C is studied by means of gas-chromatography/mass-spectrometry, IR and 1H NMR
spectroscopy. A maximum yield of oil fraction is observed at 360–390 °C. Alkanes, alkenes,
alkyl-derivatives of naphthalene and benzothiophene are the major components of
OFs formed below 440 °C. A significant predominance of even alkanes and alkenes
over their odd homologies is detected above 440 °C. The peculiarities in the varying
of the content of specific groups and individual polyaromatic substances are discussed.
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7.0.100-2018
Peculiarities of Hydrocarbon and Heteroatomic Substances Composition Obtained at Conversion of Kashpir Oil Shale in Supercritical Water / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 1. – С. 80-92. - DOI:
TRANSLIT
Osobennosti sostava uglevodorodov i geteroatomnyh soedinenij, poluchennyh pri konversii Kashpirskogo goryuchego slanca v sverhkriticheskoj vode / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 1. – S. 80-92. - DOI:
En
Peculiarities of Hydrocarbon and Heteroatomic Substances Composition Obtained at Conversion of Kashpir Oil Shale in Supercritical Water. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 80-92 (2017). https://doi.org/
Key words: oil shales, supercritical fluid extraction, pyrolysates, components, structure, composition
The conversion of high-sulfur oil shale in a supercritical benzene stream at 10 MPa and
temperatures up to 400 °C is studied. The composition of the resulting liquid products
was characterized by IR and 1H NMR spectroscopy, the structural group analysis and
gas chromatography-mass-spectrometry. The content of resin-asphaltene substances
in pyrolysates decreases, the content of aromatic fragments in their structure increases,
while that of aliphatic fragments decreases at increasing temperature along with a
decrease in the content of polar components in the oily fraction. The compounds
identified in the oils are represented by normal and branched alkanes, alkenes, saturated
or unsaturated naphthenes, mono-, bi-, tri-, tetra- and pentacyclic aromatic hydrocarbons,
as well as by the thiophene, benzo-, dibenzo- and naphthobenzothiophene derivatives,
ali phatic ethers and ketones.
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7.0.100-2018
Compositions of Products of High-Sulfur Oil Shale Transformation in Supercritical Benzene / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 4-18. - DOI:
TRANSLIT
Sostav produktov prevrashcheniya vysokosernistogo goryuchego slanca v sverhkriticheskom benzole / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 4-18. - DOI:
En
Compositions of Products of High-Sulfur Oil Shale Transformation in Supercritical Benzene. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 4-18 (2017). https://doi.org/
Key words: subcritical water, aporphine alkaloids, glaucine, phenanthrene alkaloids, seco-glaucine, HPLC
The synthesis of phenanthrene alkaloid seco-glaucine from herbal aporphine alkaloid
glaucine in subcritical water is studied at 100—250 °C with no catalytic additived. The
maximum product yield (∼ 80 %) that is reached at 250 °C is virtually independent on
the amount of the initial compound. The product can be directly preci pitated from the
reaction mixture if its concentration is sufficiently high. No use of constly and toxic
organic solvents is required.
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Synthesis of Seco-Glaucine as a Model Study for Synthesis of Phenanthridone Alkaloids from Herbal Aporphine Alkaloids / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 19-25. - DOI:
TRANSLIT
Sintez fenantrenovyh alkaloidov iz rastitel'nyh aporfinovyh alkaloidov v srede subkriticheskoj vody na primere polucheniya seko-glaucina / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 19-25. - DOI:
En
Synthesis of Seco-Glaucine as a Model Study for Synthesis of Phenanthridone Alkaloids from Herbal Aporphine Alkaloids. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 19-25 (2017). https://doi.org/
Key words: Pelargonium graveolens, essential oil, supercritical fluid extraction
Optimal conditions (40 °C, 16 MPa, process duration 30 min) for the extraction of
Pelargonium graveolens L’Her essential oil using supercritical (SC) carbon dioxide
are determined. GC-MS analysis of the obtained product shows higher concentration
of target components (e.g., citronellol, geraniol) in it compared to the oil obtained
using a traditional method (steam distillation). Additional components, such as camphene,
sabinene, etc., are also present in the product obtained via the extraction with SC-CO2.
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7.0.100-2018
Evaluation of Supercritical Carbon Dioxide Extraction Efficiency for Pelargonium Graveolens L’Her Essential Oil Production / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 26-34. - DOI:
TRANSLIT
Ocenka effektivnosti sverhkriticheskoj uglekislotnoj ekstrakcii efirnogo masla iz gerani dushistoj (Pelargonium graveolens L’Her) / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 26-34. - DOI:
En
Evaluation of Supercritical Carbon Dioxide Extraction Efficiency for Pelargonium Graveolens L’Her Essential Oil Production. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 26-34 (2017). https://doi.org/
Key words: supercritical fluids, aerogel, supercritical drying, homogenization, spraying
A complex study of the production of sodium alginate aerogel particles by emulsion
gelation and dripping methods followed by drying in supercritical carbon dioxide. The
factors that affect the characteristics of the obtained materials are determined. The
above mentioned methods are tested on a semi-industrial level using high pressure
homogenization and spraying through pneumatic nozzles. The resulting gel particles
were dried in a supercritical carbon dioxide medium using the equipment of 0.25 and
2 L volume of drying vessels. The necessary characteristics and quality of the obtained
aerogels do not decline at production scaling-up.
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7.0.100-2018
Production of Sodium Alginate-Based Aerogel Particles Using Supercritical Drying in Units of Different Volume / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 35-48. - DOI:
TRANSLIT
Processy polucheniya chastic aerogelej na osnove al'ginata natriya s ispol'zovaniem sverhkriticheskoj sushki v apparatah razlichnogo ob"ema / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 35-48. - DOI:
En
Production of Sodium Alginate-Based Aerogel Particles Using Supercritical Drying in Units of Different Volume. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 35-48 (2017). https://doi.org/
Key words: polymer membranes, gas separation, 1,2-disubstituted polyacetylenes, polymer chemical modification, СО2 separation, permeability, selectivity, quaternization
This work is devoted to the investigation of supercritical fluid media applicability for
the modification of a promising gas-separating polymer in order to improve CO2-selectivity.
The possibility to introduce a quaternary ammonium salt functional group
into poly(4-methyl-2-pentyne) structure via two-stage process was demonstrated:
bromination with N-bromosuccinimide and its subsequent addition to a tertiary amine
(quaternization) in supercritical fluid media. Using trifluoromethane as a reaction
media leads to the highest polymer modification degree. The best achieved result gave
a three-fold increase in CO2/N2 selectivity in comparison with initial
poly(4-methyl-2-pentyne).
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Modification of Poly(4-Methyl-2-Pentyne) in Supercritical Fluid Media for the Preparation of CO2-Selective Gas Separation Membranes / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 49-59. - DOI:
TRANSLIT
Modifikaciya poli(4-metil-2-pentina) v srede sverhkriticheskih flyuidov dlya sozdaniya SO2-selektivnyh gazorazdelitel'nyh membran / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 49-59. - DOI:
En
Modification of Poly(4-Methyl-2-Pentyne) in Supercritical Fluid Media for the Preparation of CO2-Selective Gas Separation Membranes. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 49-59 (2017). https://doi.org/
Key words: osteoplastic material, bone block, supercritical carbon dioxide, deli pidization, bone, implants
An environmentally benign method for production of osteoplastic materials for
reconstructive surgery based on the supercritical fluid extract with carbon dioxide is
developed. The method ensures an efficient removal of li pids and li poids with minimal
consumption of carbon dioxide and processing time at reduced production costs. It is
optimized for the production of osteoplasty matrixes of xenogenic bone origin. The
advantages of the obtained material in comparison with existing commercial analog
in in vitro experiments are demonstrated.
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7.0.100-2018
Method of Deep Cleaning of Ksenogenic Bone Matrix by Extraction of Lipids with Supercritical Carbon Dioxide and Evaluation of Obtained Material / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 60-67. - DOI:
TRANSLIT
Ekstrakcionnaya ochistka ksenogennogo kostnogo matriksa v srede sverhkriticheskogo dioksida ugleroda i ocenka svojstv poluchennogo materiala / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 60-67. - DOI:
En
Method of Deep Cleaning of Ksenogenic Bone Matrix by Extraction of Lipids with Supercritical Carbon Dioxide and Evaluation of Obtained Material. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 60-67 (2017). https://doi.org/
Key words: sapphire, laser backside wet etching, microstructuring, thermoplasmonic, supercritical water, ultrahigh pressures and temperatures
For effective and well-controlled microstructuring of sapphire, the method of
thermoplasmonic laser-induced backside wet etching (TPLIBWE) was applied. The
method is based on the generation of highly absorbing silver nanoparticles generated
in the course of the pulsed-periodic laser irradiation, which are formed as a result of
laser destruction of AgNO3, a silver precursor dissolved in water. The process of
sapphire etching is carried out by supercritical water at ultrahigh temperatures and
pressures substantially exceeding the critical values for water and formed at the
sapphire/water interface as a result of the absorption of laser pulses by silver
nanoparticles. The mechanism of TPLIBWE is considered, the etching rates reaching
∼100 nm/pulse are determined. The formation of aluminum nanoparticles is revealed,
which indicates the deep destruction of Al2O3 as a result of TPLIBWE.
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Etching of Sapphire in Supercritical Water at Ultrahigh Temperatures and Pressures under the Conditions of Pulsed Laser Thermoplasmonics / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 2. – С. 68-80. - DOI:
TRANSLIT
Travlenie sapfira v sverhkriticheskoj vode pri ul'travysokih temperaturah i davleniyah v usloviyah impul'snoj lazernoj termoplazmoniki / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 2. – S. 68-80. - DOI:
En
Etching of Sapphire in Supercritical Water at Ultrahigh Temperatures and Pressures under the Conditions of Pulsed Laser Thermoplasmonics. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 68-80 (2017). https://doi.org/
Key words: heavy oil, supercritical water-oxygen fluid, activated carbon, oxidation, heat release
The composition of oily fractions (OFs) obtained at the heavy sulfur-rich oil conversion
is studied by means of physical and chemical methods of analysis. The oil was supplied
from the top into the vertical tubular reactor packed with activated carbon (AC),
where supercritical water-oxygen fluid was pumped from the bottom through the AC
bed. The experiment was performed at 30 MPa, temperature of upper, middle and
bottom parts of the reactor equal to 673, 723 and 723 K, variable flow rate of oxygen
(0—3.5 g/min) and constant flow rate of oil and water (4 and 6 g/min, respectively).
Based on the temporal trends in the reactor wall temperature and the power of
resistance heaters it is revealed that due to heat generation during the combustion of
oil high-molecular components, accumulated in the AC bed, the conversion process
occurs in autothermal mode. The movement of the combustion front along the reactor
axis is detected. It is shown that isoprenoids and normal alkanes, 1-alkyl-2,3,6-
trimethylbenzenes, alkyl-derivatives of benzo- and dibenzothiophenes are the main
components of the crude oil OF. The yield of OFs, whose portion in the liquid products
exceeds 90 %, has an extreme dependence on the oxygen flow rate. As the latter increases
and the temperature of the reaction mixture rises due to a heat generation upon
combustion, the relative content of bi- and tricyclic aromatic hydrocarbons alkylderivatives,
as well as benzo- and dibenzothiophenes in the OFs of conversion products
increases too. The content of fractions boiling at T < 493 K in the OFs of the conversion
product increases by 2—3 times compared to the crude oil OF.
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Composition of Oil Fractions Obtained in Conjugated Processes of Heavy Sulfur-Rich Oil Thermolysis and Activated Carbon Oxidation by Supercritical Water-Oxygen Fluid / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 3. – С. 3-19. - DOI:
TRANSLIT
Sostav maslyanyh frakcij, poluchennyh pri sopryazhennyh processah termoliza tyazheloj vysokosernistoj nefti i okisleniya aktivirovannogo uglya sverhkriticheskim vodokislorodnym flyuidom / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 3. – S. 3-19. - DOI:
En
Composition of Oil Fractions Obtained in Conjugated Processes of Heavy Sulfur-Rich Oil Thermolysis and Activated Carbon Oxidation by Supercritical Water-Oxygen Fluid. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 3-19 (2017). https://doi.org/
Key words: film composite, cadmium selenide, nanocrystalline silicon, diffusion implantation, luminescent properties, fiber matrix
A method to produce film composites based on the tetrafluoroethylene-vinylidene
fluoride fiber copolymer using diffusion implantation of nanoparticles dispersed in a
supercritical (SC) carbon dioxide CO2 medium has been developed. At the final stage
of the formation of such materials, a cold or hot pressing of impregnated porous films
is applied. The effect of treatment in SC-CO2 on the surface structure of pressed films
is discussed. The materials containing nanoparticles of semiconductors (cadmium
selenide and nanocrystalline silicon) whose radiation covers a range of 500—1000 nm
are obtained. Their luminescent characteristics under the laser excitation (irradiation
wavelength 405 nm) are presented.
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Luminescent Composites Based on Tetrafluoroethylene Copolymer Porous Films Produced by Introduction of Semiconductor Nanoparticles in Supercritical Medium / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 3. – С. 20-31. - DOI:
TRANSLIT
Lyuminesciruyushchie kompozity na osnove poristyh plenok sopolimera tetraftoretilena, poluchennye s pomoshch'yu diffuzionnogo vnedreniya poluprovodnikovyh nanochastic v SKF srede / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 3. – S. 20-31. - DOI:
En
Luminescent Composites Based on Tetrafluoroethylene Copolymer Porous Films Produced by Introduction of Semiconductor Nanoparticles in Supercritical Medium. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 20-31 (2017). https://doi.org/
Key words: aerosilica, adsorption of carbon dioxide, amino-functionalization
Mesoporous silica gel samples, including those functionalized with amino groups, were
prepared using sol-gel synthesis followed by drying in supercritical carbon dioxide.
Relationshi ps between the conditions of preparation and modification of the silica
sample and their textural and adsorptive properties are established. The obtained porous
materials are considered as promising adsorbents for the recovery of carbon dioxide
from gas media.
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ГОСТ
7.0.100-2018
Adsorption Properties of Aerosilicagels Obtained by Drying in Supercritical Carbon Dioxide Atmosphere / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 3. – С. 32-39. - DOI:
TRANSLIT
Adsorbcionnye svojstva aerosilikagelej, poluchennyh sushkoj v srede sverhkriticheskogo dioksida ugleroda / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 3. – S. 32-39. - DOI:
En
Adsorption Properties of Aerosilicagels Obtained by Drying in Supercritical Carbon Dioxide Atmosphere. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 32-39 (2017). https://doi.org/
Key words: polymers, porosity, supercritical fluids, subcritical freons, carbon dioxide
For the first time the treatment of polystyrene in sub- and supercritical freon media
in comparison with supercritical carbon dioxide was studied. Subcritical freon R22
can more efficiently saturate polystyrene than subcritical freon R410а and supercritical
freon R23 and carbon dioxide. The subsequent heating of polystyrene samples saturated
with R22 freon leads to the formation of the polymer with connected porous structure
and average pore size up to 250 μm. The results obtained can be used in the development
of technologies for porous polystyrene production.
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ГОСТ
7.0.100-2018
Polystyrene Treatment in Sub- and Supercritical Media / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 3. – С. 40-49. - DOI:
TRANSLIT
Obrabotka polistirola v sub- i sverhkriticheskih sredah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 3. – S. 40-49. - DOI:
En
Polystyrene Treatment in Sub- and Supercritical Media. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 40-49 (2017). https://doi.org/
Key words: supercritical fluids, micronization, polymerization, polymer microparticles, functional powder coatings, market forecast
This review analyzes the studies and developments of technologies based on the use of
supercritical fluids for micronization of polymer particles and formation of efficient
powder polymer coatings. Potential advantages of supercritical fluid technologies that
combine different stages of powder coating formation in a unified flowsheet are
considered. Possible further trends in the scientific and engineering research are
identified. The growth of powder coatings global market in perspective to the year
2020 is forecasted.
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ГОСТ
7.0.100-2018
Development of Functional Polymer Coatings Using Supercritical Fluids: Technologies, Markets, Prospects / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 3. – С. 50-69. - DOI:
TRANSLIT
Sozdanie funkcional'nyh polimernyh pokrytij s ispol'zovaniem sverhkriticheskih flyuidov: tekhnologii, rynki, perspektivy razvitiya / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 3. – S. 50-69. - DOI:
En
Development of Functional Polymer Coatings Using Supercritical Fluids: Technologies, Markets, Prospects. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 50-69 (2017). https://doi.org/
Key words: structured hydrogels, matrixes, laser stereolithography, supercritical carbon dioxide
Hydrogel matrix structures (matrixes) based on the allyl-substituted chitosan derivatives
are formed using the laser stereolithography. The effects of their processing in the
supercritical carbon dioxide (SC-CO2) onto the surface polarity and mechanical
characteristics are studied. It is found that such treatment of matrixes in the flow
regime increases the mechanical strength due to an efficient extraction of low molecular
weight components and oligomers from the material. In addition, the processing in the
SC-CO2 decreases the surface polarity and, as a result, improves the biocompatibility of
the material. The hydrogel matrixes treated in the SC-CO2 have no cytotoxic effect and
are prospective materials for tissue engineering.
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ГОСТ
7.0.100-2018
Supercritical Fluid Treatment of Three-Dimensional Hydrogel Matrixes Synthesized from Allilchitosan Using Laser Stereolithography / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2017. – Т. 12. – № 3. – С. 70-81. - DOI:
TRANSLIT
Sverhkriticheskaya flyuidnaya obrabotka trekhmernyh gidrogelevyh matriksov, poluchennyh iz allilhitozana metodom lazernoj stereolitografii / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2017. – Т. 12. – № 3. – S. 70-81. - DOI:
En
Supercritical Fluid Treatment of Three-Dimensional Hydrogel Matrixes Synthesized from Allilchitosan Using Laser Stereolithography. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 3, 70-81 (2017). https://doi.org/