Voprosy Khimii i Khimicheskoi Tekhnologii最新文献_第10页

Polymeric ionic liquids and ionic liquids of ionen type 聚合物离子液体和离子型离子液体

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-68-79

O. Sverdlikovska, O. Chervakov, D. Chervakov, B.V. Burkevich, Yevhenii Levchenko

{"title":"Polymeric ionic liquids and ionic liquids of ionen type","authors":"O. Sverdlikovska, O. Chervakov, D. Chervakov, B.V. Burkevich, Yevhenii Levchenko","doi":"10.32434/0321-4095-2022-145-6-68-79","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-68-79","url":null,"abstract":"A set of new experimental data was obtained regarding the influence of the structure of dimer ionene ionic liquids on their physical and chemical properties, which is the basis of the methodology for the synthesis of polymer ionene ionic liquids. It was established that the introduction of allyl and -hydroxyethyl groups into the quaternary nitrogen atom, the presence of a dibenzyl fragment at the cationic center and alkylaromatic radicals permit obtaining polymeric ionic liquids of the ionene type with a high level of ionic conductivity at a low glass transition temperature. Newly synthesized polymeric ionic liquids and ionene ionic liquids based on 1,2-epoxy-4,7-dioxononen-8 and tetrahydro-1,4-oxazine derivatives with an ionic conductivity of ~10–1–10–4 S cm–1 with glass transition temperature range of –1400С to –160С exhibited five to six orders of magnitude higher ionic conductivity as compared with known analogues. Recommendations for solving the problem of developing polymeric ionic liquids and ionene ionic liquids exhibiting high ionic conductivity while maintaining their liquid state in a wide temperature range have been developed.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81037432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature and physical-mechanical properties of thermoplastic materials based on polyhydroxybutyrate 基于聚羟基丁酸酯的热塑性材料的温度和物理力学性能

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-80-87

I. Semeniuk, V. Kochubei, V. Skorokhoda, Y. Melnyk, N. Semenyuk, N. Koretska, T. Pokynbroda

{"title":"Temperature and physical-mechanical properties of thermoplastic materials based on polyhydroxybutyrate","authors":"I. Semeniuk, V. Kochubei, V. Skorokhoda, Y. Melnyk, N. Semenyuk, N. Koretska, T. Pokynbroda","doi":"10.32434/0321-4095-2022-145-6-80-87","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-80-87","url":null,"abstract":"The temperature and physical-mechanical properties of polyhydroxybutyrate obtained during the cultivation of Azotobacter vinelandii N-14 bacteria strain, polylactic acid, poly(-caprolactone) and their blends were studied. Polymer samples in the form of films with a thickness of 50 m were cast on silicate glass plates applying 3% solutions of biopolymers in chloroform and subjected to heat treatment in an air thermostat at the temperature of 1100C for 20 minutes. It was found that the previous heat treatment of the studied biodegradable polymers increases their heat resistance which is evidenced by the shift of their thermal effects of melting to higher temperature area. It was determined that films based on polyhydroxybutyrate/polylactic acid/poly(-caprolactone) (20:55:25 wt.%) blend possesses improved mechanical properties. The film relative elongation at break increases from 3% to 46% for polyhydroxybutyrate and for the mixture, respectively. This is explained by the presence of poly(-caprolactone) polymers in above mixture. At the same time, despite the lower tensile strength characteristic which are typical of poly(-caprolactone), this value is higher for the polymer blends than for polyhydroxybutyrate (38.3 and 33.0 MPa, respectively). This is due to the high polylactic acid content (55%) in the polymer composition. The presence of poly(-caprolactone) (25%) in the blend improves the fluidity of its melt which will enable to reduce the temperature of product formation. The derived polymer mixture is recommended for the manufacturing of various packaging materials for food, agricultural and pharmaceutical products.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80097481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research of the impact of new compositions on the decomposition of stable water-oil emulsions of heavy oils 新组分对稠油稳定水油乳剂分解的影响研究

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-19-28

引用次数: 1

Determination of approaches to the development of ceramic compositions for the manufacture of facial bricks 面砖制造用陶瓷成分开发方法的确定

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-98-107

О. Khomenko, B. Datsenko, G. Fomenko

引用次数: 1

Synthesis of petroleum resins in the presence of aliphatic aminoperoxides 在脂肪族氨基过氧化物存在下合成石油树脂

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-88-97

R. Subtelnyy, D. Kichura, B. Dzinyak

{"title":"Synthesis of petroleum resins in the presence of aliphatic aminoperoxides","authors":"R. Subtelnyy, D. Kichura, B. Dzinyak","doi":"10.32434/0321-4095-2022-145-6-88-97","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-88-97","url":null,"abstract":"Synthesis of petroleum resins in the presence of aliphatic N-substituted aminoperoxides of general formula C(CH3)3–O–O–CH2–N–R1R2 was investigated in this communication. The effects of reaction temperature (393–493 K), reaction time (240–480 min) and aminoperoxide concentration (0.032–0.096 mol/l) on the yield and characteristics of the petroleum resins were studied. The correlation index (0.85–0.92, absolute value) for the pair \"yield–bromine number\" confirmed that the oligomerization reaction proceeded on monomer's unsaturated bonds. It was found that the obtained resins were mainly styrene-cyclopentadiene cooligomers. Depending on the initiator used, they contained 38.8–40.41% styrene and 31.1–33.04% cyclopentadiene. The analysis of the experimental results demonstrated that the most significant effect (correlation index of 0.75–0.88) on the yield of petroleum resins had the reaction temperature. Compared with thermal oligomerization (without initiator), the use of aminoperoxides allowed increasing the product yield (453 K, 360 min, 0.064 mol/l) by 4.6–18.3%. The yield of petroleum resins did not correlate with the reaction time. Blending the obtained resins with petroleum bitumen increased the composition stability in aggressive environments.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89579044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of fineness of glass cullet grinding on the structure and properties of porous glass ceramic materials 玻璃碎粒研磨细度对多孔玻璃陶瓷材料结构和性能的影响

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-56-60

Y. Lykholat

{"title":"Influence of fineness of glass cullet grinding on the structure and properties of porous glass ceramic materials","authors":"Y. Lykholat","doi":"10.32434/0321-4095-2022-145-6-56-60","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-56-60","url":null,"abstract":"This research was aimed at establishing the effect of fineness of glass cullet grinding on the properties of porous glass ceramic materials obtained using open-hearth furnace slag as a gas-forming agent. Firing of the samples was carried out at the temperature of 7500С. For the samples under study, the volumetric weight and compressive strength were determined, the swelling coefficients were calculated, and the types of structure were analyzed, which depend on the average diameter of the predominant pores. It was found that the average pore size increased and the structure of the samples changed from fine (0.5 mm) to medium-porous (2–3 mm) with an increase in the specific surface of cullet. At the same time, there was a decrease in the volumetric weight of the samples from 500 kg m–3 to 325 kg m–3 and, accordingly, a decrease in the compressive strength limit from 6.76 MPa to 2.59 MPa. It was determined that it is necessary to use cullet with a specific surface area of at least 290 m2 kg–1 in order to obtain materials with a uniform fine- and medium-porous structure (average pore size of up to 1 mm). In the case of using cullet with a specific surface of 320 m2 kg–1, it is possible to obtain material having swelling coefficient of 3.98, volumetric weight of 376 kg m–3 and compressive strength of 3.53 MPa. A further increase in fineness of cullet grinding increases production costs and allows obtaining materials with lower volumetric weight and strength and with a pore size of up to 2–3 mm.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78537895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and electrochemical properties of N-doped graphene–graphite composites n掺杂石墨烯-石墨复合材料的结构和电化学性能

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-61-67

R. Panteleimonov, О.V. Boichuk, K. Pershina, V. Ogenko

{"title":"Structural and electrochemical properties of N-doped graphene–graphite composites","authors":"R. Panteleimonov, О.V. Boichuk, K. Pershina, V. Ogenko","doi":"10.32434/0321-4095-2022-145-6-61-67","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-61-67","url":null,"abstract":"This work studied the impact of graphene content and heat treatment on the structural changes and electrical parameters of graphite/N-doped graphene mixtures. Using photoelectron spectroscopy the appearance of two types of carbon-containing phases was detected in the visible range of the N-doped graphene samples synthesized from liquid nitrogen. The following features of the samples were shown: one typical structure of graphene (sp2C–sp2C), two atypical structures (sp3C–N and the C–O bond), and graphene components modified with nitrogen (pyridine–N, pyrrole–N, graphite–N and oxidized N–O). The dependence between the ratio of components in graphite–graphene mixtures and their electrochemical properties was found. The effect of graphite content and heat treatment on the change in the type of conductivity in a graphite–graphene mixture was determined by comparison of resistance and capacitance distribution in the frequency range of 100–900 Hz. The change of the graphite concentration in the graphene–graphite mixture allows governing the type of doping and electrical parameters of the mixtures.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86621872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocatalytic activity of nickel-based coatings deposited in DES-assisted plating baths containing cerium(III) ions 含铈(III)离子的des辅助镀液中镍基镀层的电催化活性

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-29-38

F. Danilov, L. Bobrova, L. Pavlenko, S. Korniy, V. Protsenko

{"title":"Electrocatalytic activity of nickel-based coatings deposited in DES-assisted plating baths containing cerium(III) ions","authors":"F. Danilov, L. Bobrova, L. Pavlenko, S. Korniy, V. Protsenko","doi":"10.32434/0321-4095-2022-145-6-29-38","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-29-38","url":null,"abstract":"This paper concerns electrodeposition of coatings from electrolytes containing NiCl2 (0.1 mol dm–3) and CeCl3 (0.1–0.4 mol dm–3) salts dissolved in a deep eutectic solvent, ethaline (ethylene glycol+choline chloride). The electrochemical deposition was carried out at cathodic current densities from 1 to 5 mA cm–2 and temperatures from 50 to 900C. It was shown that micromodification of the chemical composition of coatings with cerium occurred (no more than ~1–2.65 wt.% Ce), and the content of cerium in the coating was increased with an increase in the concentration of the Ce(III) salt in the plating electrolyte, an increase in the current density, and a decrease in the temperature. It was shown for the first time that the Ni-based electrodeposits micromodified with cerium exhibited an enhanced electrocatalytic activity in the reaction of hydrogen evolution in an alkaline medium (a decrease in the cathodic polarization by ~200–250 mV). Electrocatalytic activity correlated with the content of cerium in the coating. The enhancement of the efficiency of electrocatalysis resulting from micromodification of the chemical composition of the coatings with cerium was explained within the framework of the well-known concept of the synergistic effect of hypo-hyper-d-electronic combinations of transition metals. The use of electrolytes based on deep eutectic solvents provides additional opportunities for flexible control of the composition of deposited coatings and their electrocatalytic behavior via changes in the concentration of electrolyte components and electrolysis conditions in relatively wide intervals.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83678758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synthesis and properties of oligodiurethane-containing carbofunctional alcohols based on polyisocyanate 基于多异氰酸酯的含低聚二氨基甲酸碳官能醇的合成及性能

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-49-55

M. Kuzmenko, O. Kuzmenko, T.G. Filinska, V.V. Bugrim

引用次数: 0

Biodegradable surfactants from side streams of the vegetable oils production in technical systems 技术系统中植物油生产侧流的可生物降解表面活性剂

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI: 10.32434/0321-4095-2022-145-6-3-11

L. Bodachivska

{"title":"Biodegradable surfactants from side streams of the vegetable oils production in technical systems","authors":"L. Bodachivska","doi":"10.32434/0321-4095-2022-145-6-3-11","DOIUrl":"https://doi.org/10.32434/0321-4095-2022-145-6-3-11","url":null,"abstract":"This work reports the structure of surfactants synthesized from by-products of the vegetable oil production. These are raw materials that do not compete with food products; they are low-cost phosphatidic sludge that can be used directly for chemical transformation. Fatty acid monoetanolamides derived from side streams of the vegetable oils production do not have residues of the original phosphatides or acylglycerols as determined by spectral methods. There are clearly reflected cross-peaks between the amide group and the adjacent methylene group. This indicates a high conversion of substrate and further confirms the amidation reaction. The main acyl residue of the synthesized surfactants are hydrocarbon chain of linoleic acid however, while the detection of methylene groups near double bonds indicates the presence of other fatty acids (oleic, linolenic and gadolein), this corresponds to the fatty acid composition of the original phosphatidic sludge. Synthesized surfactants are effective emulsifiers-stabilizers for dispersed systems. The use of environmentally friendly components in the composition of surfactants improves their biodegradability to 83–86%.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75784825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0