Pub Date : 2020-01-01DOI: 10.17277/amt.2020.04.pp.041-057
V. Yartsev, O. Kiseleva
The paper presents a unified classification of wood composites by structure which makes it possible to better understand the mechanism of destruction. The influence of external structure and composition on the operational properties and durability of wood and wood composites is described. Methods for increasing the operational parameters of wood and wood-based panels are presented.
{"title":"The Influence of Composition and Structure on the Performance Properties of Wood Composites","authors":"V. Yartsev, O. Kiseleva","doi":"10.17277/amt.2020.04.pp.041-057","DOIUrl":"https://doi.org/10.17277/amt.2020.04.pp.041-057","url":null,"abstract":"The paper presents a unified classification of wood composites by structure which makes it possible to better understand the mechanism of destruction. The influence of external structure and composition on the operational properties and durability of wood and wood composites is described. Methods for increasing the operational parameters of wood and wood-based panels are presented.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"7 1","pages":"041-057"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87871384","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}
Pub Date : 2020-01-01DOI: 10.17277/amt.2020.02.pp.025-031
A. Melezhik, A. Zelenin, O. Alekhina, N. Memetov, A. Tkachev
The mutual solubility and polymerization in the furfural-hydroquinone-urotropin system were studied. Microporous carbon was obtained by activating the carbonized polymer with potassium hydroxide. It has been found that, depending on the mass ratio of KOH to carbonizing polymer, the specific surface area of the activated carbon varies from 2010 to 3307 m/g, and the micropore volume varies from 0.941 to 1.124 cm/g. The surface and porosity parameters of model carbon structures with homogeneous square or hexagonal pores were calculated. It is assumed that the micropore volume of the obtained activated carbons is approaching the theoretical limit. The resulting coals can be used as effective adsorbents.
{"title":"The Synthesis of Microporous Carbon in the Furfural–Hydroquinone–Urotropin System","authors":"A. Melezhik, A. Zelenin, O. Alekhina, N. Memetov, A. Tkachev","doi":"10.17277/amt.2020.02.pp.025-031","DOIUrl":"https://doi.org/10.17277/amt.2020.02.pp.025-031","url":null,"abstract":"The mutual solubility and polymerization in the furfural-hydroquinone-urotropin system were studied. Microporous carbon was obtained by activating the carbonized polymer with potassium hydroxide. It has been found that, depending on the mass ratio of KOH to carbonizing polymer, the specific surface area of the activated carbon varies from 2010 to 3307 m/g, and the micropore volume varies from 0.941 to 1.124 cm/g. The surface and porosity parameters of model carbon structures with homogeneous square or hexagonal pores were calculated. It is assumed that the micropore volume of the obtained activated carbons is approaching the theoretical limit. The resulting coals can be used as effective adsorbents.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"8 1","pages":"025-031"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76159439","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}
Pub Date : 2020-01-01DOI: 10.17277/amt.2020.02.pp.040-045
T. V. Konkova, A. Rysev, T. N. Quynh
The kinetics of sorption extraction of Al and La cations from a solution of phosphoric acid by synthetic macroporous cation exchange resin was studied. In order to obtain the limiting stage of the process, the kinetic data obtained at various temperatures were approximated by pseudo-first, pseudo-second-order models, as well as the Boyd model for various cases of diffusive drag. It was found that the kinetics of adsorption of lanthanum ions is determined primarily by the rate of surface chemical reaction, while the adsorption of aluminum ions is limited by diffusion processes. A probable reason for the selectivity of adsorption may be the formation of complex compounds of different shapes and strengths between metal cations and phosphate anions.
{"title":"The Kinetics of Sorption Extraction of Lanthanum and Aluminum Cations from a Phosphoric Acid Solution by Sulfocathionite","authors":"T. V. Konkova, A. Rysev, T. N. Quynh","doi":"10.17277/amt.2020.02.pp.040-045","DOIUrl":"https://doi.org/10.17277/amt.2020.02.pp.040-045","url":null,"abstract":"The kinetics of sorption extraction of Al and La cations from a solution of phosphoric acid by synthetic macroporous cation exchange resin was studied. In order to obtain the limiting stage of the process, the kinetic data obtained at various temperatures were approximated by pseudo-first, pseudo-second-order models, as well as the Boyd model for various cases of diffusive drag. It was found that the kinetics of adsorption of lanthanum ions is determined primarily by the rate of surface chemical reaction, while the adsorption of aluminum ions is limited by diffusion processes. A probable reason for the selectivity of adsorption may be the formation of complex compounds of different shapes and strengths between metal cations and phosphate anions.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"87 1","pages":"040-045"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84901485","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}
Pub Date : 2020-01-01DOI: 10.17277/amt.2020.01.pp.054-063
E. Akulinin, O. Golubyatnikov, D. Dvoretsky, S. Dvoretsky
Using the developed mathematical model of a flow-type chemisorption reactor and RPK-P regenerative product (nanocrystalline potassium superperoxide attached to the fibers and pore surfaces of the fibrous polymer matrix), a series of computational experiments was carried out to study the effect of the load (the number of people in the shelter, their breathing patterns) and design parameters of a chemisorption reactor for the duration of the protective action of the life support system of people. The problem of calculating the optimal design parameters of a chemical air regeneration system that provides the composition of the atmosphere for oxygen and carbon dioxide in an airtight inhabited facility at a level comfortable for human breathing for a guaranteed time in the presence of uncertain (“inaccurate”) information about the respiratory load and heat generation of people located in a sealed facility is formulated. An algorithm for solving it has been developed.
{"title":"Optimal Characteristics Calculation of the Air Chemical Regeneration System of Sealed Habitable Objects","authors":"E. Akulinin, O. Golubyatnikov, D. Dvoretsky, S. Dvoretsky","doi":"10.17277/amt.2020.01.pp.054-063","DOIUrl":"https://doi.org/10.17277/amt.2020.01.pp.054-063","url":null,"abstract":"Using the developed mathematical model of a flow-type chemisorption reactor and RPK-P regenerative product (nanocrystalline potassium superperoxide attached to the fibers and pore surfaces of the fibrous polymer matrix), a series of computational experiments was carried out to study the effect of the load (the number of people in the shelter, their breathing patterns) and design parameters of a chemisorption reactor for the duration of the protective action of the life support system of people. The problem of calculating the optimal design parameters of a chemical air regeneration system that provides the composition of the atmosphere for oxygen and carbon dioxide in an airtight inhabited facility at a level comfortable for human breathing for a guaranteed time in the presence of uncertain (“inaccurate”) information about the respiratory load and heat generation of people located in a sealed facility is formulated. An algorithm for solving it has been developed.","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"1 1","pages":"054-063"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82150545","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}
Pub Date : 2018-11-29DOI: 10.17277/AMT.2018.03.PP.045-048
A. Dolgoborodov, B. Yankovsky, V. Kirilenko, A. N. Streletsky, S. Ananyev, I. Kolbanev, G. A. Vorobyeva, A. Shevchenko
Thermite mixtures based on metals and solid oxidants allow to obtain a significant exothermic effect during combustion. Al+CuO mixture allows receiving one of the highest exothermic effects per unit of volume (more than 20kJ/cm3). However, the burning rate of initial mixtures of micron powders usually does not exceed several tens of mm/s, which limits the field of their application. This is because that development of chemical reactions in solid mixtures takes place on the contact surface of reactants, which in the case of large particles is rather small. To increase this surface, various methods are used: ultrasonic mixing of nanosized powders, electrochemical deposition of submicron metal-oxidizer layers, etc. [1]. One of the relatively new methods for obtaining thermite composition is the preliminary mechanochemical activation of mixtures of micron-sized particles in high energy intensity ball mills. Initial components in this process are shredded, mixed and acquire new defects of crystal structure, which leads to an increase in the surface area of contact of the reagents at the submicron and nanoscale levels and also to formation of additional reaction spots. Thus, by means of mechanoactivation of oxidizer-metal mixtures it is possible to regulate the rate of energy release for different of specific application. In Russia, the method of preliminary mechanoactivation of solid oxidant-metal fuel mixtures has been actively used since the beginning of the 2000s [2-5], and the resulting materials are called Mechanically Activated Energetic Composites (MAEC).
{"title":"Initiation and Combustion of Mechanoactivated Mixtures of Aluminum and Copper Oxide","authors":"A. Dolgoborodov, B. Yankovsky, V. Kirilenko, A. N. Streletsky, S. Ananyev, I. Kolbanev, G. A. Vorobyeva, A. Shevchenko","doi":"10.17277/AMT.2018.03.PP.045-048","DOIUrl":"https://doi.org/10.17277/AMT.2018.03.PP.045-048","url":null,"abstract":"Thermite mixtures based on metals and solid oxidants allow to obtain a significant exothermic effect during combustion. Al+CuO mixture allows receiving one of the highest exothermic effects per unit of volume (more than 20kJ/cm3). However, the burning rate of initial mixtures of micron powders usually does not exceed several tens of mm/s, which limits the field of their application. This is because that development of chemical reactions in solid mixtures takes place on the contact surface of reactants, which in the case of large particles is rather small. To increase this surface, various methods are used: ultrasonic mixing of nanosized powders, electrochemical deposition of submicron metal-oxidizer layers, etc. [1]. One of the relatively new methods for obtaining thermite composition is the preliminary mechanochemical activation of mixtures of micron-sized particles in high energy intensity ball mills. Initial components in this process are shredded, mixed and acquire new defects of crystal structure, which leads to an increase in the surface area of contact of the reagents at the submicron and nanoscale levels and also to formation of additional reaction spots. Thus, by means of mechanoactivation of oxidizer-metal mixtures it is possible to regulate the rate of energy release for different of specific application. In Russia, the method of preliminary mechanoactivation of solid oxidant-metal fuel mixtures has been actively used since the beginning of the 2000s [2-5], and the resulting materials are called Mechanically Activated Energetic Composites (MAEC).","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"13 1","pages":"045-048"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90278880","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}
Xuanru Zhang, W. Tang, Hao Chi Zhang, Jie Xu, G. Bai, Jun Feng Liu, T. Cui
{"title":"Plasmonics: A Spoof Surface Plasmon Transmission Line Loaded with Varactors and Short‐Circuit Stubs and Its Application in Wilkinson Power Dividers (Adv. Mater. Technol. 6/2018)","authors":"Xuanru Zhang, W. Tang, Hao Chi Zhang, Jie Xu, G. Bai, Jun Feng Liu, T. Cui","doi":"10.1002/ADMT.201870021","DOIUrl":"https://doi.org/10.1002/ADMT.201870021","url":null,"abstract":"","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"52 1","pages":"1870021"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75315208","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}
Theresia Arbring Sjöström, M. Berggren, E. Gabrielsson, Per Janson, D. Poxson, M. Seitanidou, D. Simon
{"title":"Iontronics: A Decade of Iontronic Delivery Devices (Adv. Mater. Technol. 5/2018)","authors":"Theresia Arbring Sjöström, M. Berggren, E. Gabrielsson, Per Janson, D. Poxson, M. Seitanidou, D. Simon","doi":"10.1002/ADMT.201870018","DOIUrl":"https://doi.org/10.1002/ADMT.201870018","url":null,"abstract":"","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"12 1","pages":"1870018"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74137009","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}
Yongmin Jeon, Hye-Ryung Choi, M. Lim, Seungyeop Choi, Hyuncheol Kim, J. Kwon, Kyoung-Chan Park, K. Choi
{"title":"Wearable Light Therapy: A Wearable Photobiomodulation Patch Using a Flexible Red‐Wavelength OLED and Its In Vitro Differential Cell Proliferation Effects (Adv. Mater. Technol. 5/2018)","authors":"Yongmin Jeon, Hye-Ryung Choi, M. Lim, Seungyeop Choi, Hyuncheol Kim, J. Kwon, Kyoung-Chan Park, K. Choi","doi":"10.1002/ADMT.201870017","DOIUrl":"https://doi.org/10.1002/ADMT.201870017","url":null,"abstract":"","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"52 1","pages":"1870017"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88119632","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}
{"title":"Printed Electronics: Iron Oxide Nanoparticle‐Based Magnetic Ink Development for Fully Printed Tunable Radio‐Frequency Devices (Adv. Mater. Technol. 4/2018)","authors":"M. Vaseem, F. Ghaffar, M. Farooqui, A. Shamim","doi":"10.1002/ADMT.201870013","DOIUrl":"https://doi.org/10.1002/ADMT.201870013","url":null,"abstract":"","PeriodicalId":13355,"journal":{"name":"Image Journal of Advanced Materials and Technologies","volume":"4 1","pages":"1870013"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85931391","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}
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