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

Improving the technology and equipment for industrial production of nanoplates by liquid-phase shear exfoliation of layered crystals 改进层状晶体液相剪切剥落工业生产纳米板的工艺和设备

Image Journal of Advanced Materials and Technologies Pub Date : 2022-01-01 DOI: 10.17277/jamt.2022.01.pp.013-027

Ali M. Mashhadani, Ruaa A. Al-Jarah, В. Ф. Першин

{"title":"Improving the technology and equipment for industrial production of nanoplates by liquid-phase shear exfoliation of layered crystals","authors":"Ali M. Mashhadani, Ruaa A. Al-Jarah, В. Ф. Першин","doi":"10.17277/jamt.2022.01.pp.013-027","DOIUrl":"https://doi.org/10.17277/jamt.2022.01.pp.013-027","url":null,"abstract":"For the production of nanoplates from layered crystals by liquid-phase shear exfoliation, patent-protected technologies and equipment have been developed. The main difference between the proposed technologies and equipment from the known ones is that the exfoliation process is possible only by shearing in continuous operation. Particular interest in liquid-phase exfoliation can be explained by the following advantages of this technology in relation to others: chemical reagents are used in minimal amounts (3–4 mL⋅L–1) as surfactants to prevent agglomeration of nanoplates that are formed during exfoliation; as a rule, one of the components of the created structural or functional material serves as a liquid dispersion medium; material and energy costs are much less than when using other technologies; this technology is easily scalable. The kinetics of the exfoliation process has been studied and it has been established that the concentration of nanoplate-layered crystals mainly depends on the total path of particles traveled by them in the exfoliation zone, i.e. in the zone of contact of the movable blades with the inner surface of the stator. A mathematical model has been developed for the distribution of nanoplates in a liquid, and the critical concentration of agglomeration of these plates in a liquid has been determined. A cascade technology for the production of nanoplates and a method for calculating the main regime and geometric parameters of rotary devices with moving blades are proposed.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"7 1","pages":"13-27"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://doi.org/10.17277/jamt.2022.01.pp.013-027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147910128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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