Image Journal of Advanced Materials and Technologies最新文献_第3页

Investigation of the dispersion process of polypropylene glycol in perfluorodecalin 聚丙烯乙二醇在全氟十烷中的分散过程研究

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.01.pp.028-035

A. Andreev, Daria N. Yakhina, D. Bryankin, V. Makarova

{"title":"Investigation of the dispersion process \u0000of polypropylene glycol in perfluorodecalin","authors":"A. Andreev, Daria N. Yakhina, D. Bryankin, V. Makarova","doi":"10.17277/jamt.2022.01.pp.028-035","DOIUrl":"https://doi.org/10.17277/jamt.2022.01.pp.028-035","url":null,"abstract":"Perfluorinated polyesters (PFPE) are used as components of high-performance lubricants and oils operating in high and low temperature conditions, including in special-purpose products used in space and in Arctic conditions. To date, the methods for producing PFPE are complex processes that are quite demanding to the conditions of synthesis, which makes it almost impossible to produce these compounds commercially on a large scale. One of the promising approaches to obtaining perfluorinated esters is liquid-phase direct fluorination. Toxic, ozone-depleting solvents have been used in these processes. When they are replaced with harmless, perfluorinated liquids, for example, perfluorodecalin (PFD), another problem is found – the original polyesters are insoluble in PFD, which is confirmed by laser microinterferometry. In this regard, ultrasonic dispersion of the initial polypropylene glycols (PPGs) of various molecular weights in PFD was proposed in order to obtain emulsions for subsequent direct fluorination. The resulting emulsions were studied using gel-penetrating chromatography, dynamic light scattering and gravimetry. According to the results of the study, the values of particle sizes and emulsion concentrations were obtained over time after ultrasound, and it was also concluded that the stability of the molecular weight of PPG in the emulsion after sonification. The applicability of ultrasonic dispersion for a high specific surface area of the phase boundary in the PPG – PFD system is discussed, and the feasibility of sonification in a continuous or batch mode when implementing liquid-phase fluorination of PPG in PFD is also discussed.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78584207","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

Environmentally friendly antifouling transparent coatings based on sol-gel “epoxy/titanium tetrabutoxide” composition modified with detonation nanodiamond 以爆轰纳米金刚石改性的溶胶-凝胶“环氧/四氧化钛”组合物为基础的环保防污透明涂料

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.03.pp.201-218

O. Shilova, I. B. Glebova, Vadim I. Voshchikov, V. Ugolkov, V. Y. Dolmatov, K. A. Komarova, A. Ivanova

引用次数: 1

Investigation of oxide electrocatalysts for glucose monitoring systems 葡萄糖监测系统中氧化物电催化剂的研究

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.04.pp.299-309

Ekaterina A. Nikolaeva, S. Urvanov, I. S. Filimonenkov, V. Mordkovich

引用次数: 0

Experimental study of an annular four-stage thermoacoustic engine with a traveling wave 环形四级行波热声发动机的实验研究

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.02.pp.149-158

I. B. Gorshkov, V. Petrov

引用次数: 0

Carbon nanolayers modified with boron atoms as a basis for devices with ionic conductivity: theoretical study 硼原子修饰碳纳米层作为离子电导率器件的基础:理论研究

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.02.pp.097-103

S. Boroznin

引用次数: 0

Effect of the carbon nanotubes size and oxidative treatment on their optical properties 碳纳米管尺寸和氧化处理对其光学性能的影响

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.02.pp.104-112

B. Ezzeddin, E. Tugolukov, T. Dyachkova, N. Chapaksov

引用次数: 0

The global information and cosmological problem: 2020 Nobel Prize winner in Physics Roger Penrose 全球信息和宇宙学问题:2020年诺贝尔物理学奖得主罗杰·彭罗斯

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.03.pp.168-171

V. Fedorov, I. Hargittai, V. M. Tyutyunnik

引用次数: 0

Obtaining nanocrystalline superhard materials from surface-modified nanodiamond powder 从表面改性纳米金刚石粉末中获得纳米晶超硬材料

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.04.pp.256-269

P. Vityaz, V. Senyut, M. Kheifetz, A. Kolmakov

引用次数: 2

Finding rational regimes for direct fabrication of long products from powders of refractory compounds by SHS extrusion 寻找用SHS挤压法直接从难熔化合物粉末中制备长产品的合理工艺条件

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.03.pp.172-180

L. S. Stel'makh, A. O. Zhidovich, A. Stolin, Sergey V. Karpov

引用次数: 0

Surface functionalization of CNTs by a nitro group as a sensor device element: theoretical research 硝基作为传感器元件的碳纳米管表面功能化:理论研究

Image Journal of Advanced Materials and Technologies Pub Date : 2021-07-02 DOI: 10.17277/jamt.2021.02.pp.113-121

I. Zaporotskova, N. Boroznina, E. Dryuchkov, Tatyana S. Shek, Yulia V. Butenko, P. Zaporotskov

{"title":"Surface functionalization of CNTs by a nitro group \u0000as a sensor device element: theoretical research","authors":"I. Zaporotskova, N. Boroznina, E. Dryuchkov, Tatyana S. Shek, Yulia V. Butenko, P. Zaporotskov","doi":"10.17277/jamt.2021.02.pp.113-121","DOIUrl":"https://doi.org/10.17277/jamt.2021.02.pp.113-121","url":null,"abstract":"The problem of modifying carbon nanotubes (CNTs) by functional groups is relevant in connection with the intensive development of the nanoindustry, in particular, nano- and microelectronics. For example, a modified nanotube can be used as a sensor device element for detecting microenvironments of various substances, in particular, metals included in salts and alkalis. The paper discusses the possibility of creating a highly efficient sensor using single-walled carbon nanotubes as a sensitive element, the surface of which is modified with the functional nitro group —NO2. Quantum-chemical research of the process of attaching a nitro group to the outer surface of a single-walled CNTs of the (6, 0) type were carried out, which proved the possibility of modifying CNTs and the formation of a bond between the \u0000—NO2 group and the carbon atom of the nanotube surface. The results of computer simulation of the interaction process of a surface-modified carbon nanotube with alkali metal atoms (lithium, sodium, potassium) are presented. The sensory interaction of a modified carbon nanosystem with selected metal atoms was investigated, which proved the possibility of identifying these atoms using a nanotubular system that can act as a sensor device element. When interacting with alkali metal atoms in the “СNT – NO2” complex, the number of major carriers increases due to the transfer of electron density from metal atoms to the modified CNTs. The results presented in this paper were obtained using the molecular cluster model and the DFT calculation method with the exchange-correlation functional B3LYP (valence split basis set 6-31G).","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74471501","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