scholarly journals Development of a parabolic mirror using advanced materials used for an environment friendly propulsion system

2018 ◽  
Author(s):  
Horaţiu Şerbescu ◽  
Constantin Sandu ◽  
Sebastian Vintila ◽  
Andrei Radu ◽  
Filip Niculescu
Keyword(s):  
Propulsion System ◽  
Advanced Materials ◽  
Parabolic Mirror ◽  
Environment Friendly ◽  
Materials Used

scholarly journals Recycling of Waste Moulding Sands with New Binders

2013 ◽  
Vol 13 (2) ◽  
pp. 43-48
Author(s):  
I. Izdebska-Szanda ◽  
M. Angrecki ◽  
A. Palma
Keyword(s):  
New Technology ◽  
Advanced Materials ◽  
Environment Friendly ◽  
Ferrous Metals ◽  
Preliminary Research ◽  
Non Ferrous Metals ◽  
Waste Studies

Abstract This paper presents the results of research which is part of studies carried out under the project POIG.01.01.02-00-015/09 "Advanced Materials and Technologies", one of the aims of which is to introduce new, environment-friendly, inorganic binders to the production of castings from non-ferrous metals. The paper presents the results of research on the management of waste moulding sands prepared according to the new technology, including their multiple reclamation and management of post-reclamation waste. Studies of multiple reclamation are a continuation of the preliminary research described earlier. The programme of the studies described in this paper also included validation of the results under industrial conditions.

scholarly journals Modified Chitosan for Silver Recovery—Kinetics, Thermodynamic, and Equilibrium Studies

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 657 ◽  
Author(s):  
Bogdan Pascu ◽  
Cristina Ardean ◽  
Corneliu Mircea Davidescu ◽  
Adina Negrea ◽  
Mihaela Ciopec ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Maximum Efficiency ◽  
Metallic Silver ◽  
Maximum Adsorption Capacity ◽  
Silver Recovery ◽  
Equilibrium Studies ◽  
Environment Friendly ◽  
Modified Chitosan ◽  
Materials Used

The aim of this study is to investigate the silver recovery from aqueous solutions. There are a variety of recovery methods, such as hydrometallurgical, bio-metallurgical, cementation, reduction, electrocoagulation, electrodialysis, ion exchange, etc. Adsorption represents a convenient, environment friendly procedure, that can be used to recover silver from aqueous solutions. In this paper we highlight the silver adsorption mechanism on chitosan chemically modified with active groups, through kinetic, thermodynamic, and equilibrium studies. A maximum adsorption capacity of 103.6 mg Ag(I)/g of adsorbent for an initial concentration of 700 mg/L was noticed by using modified chitosan. Lower adsorption capacity has been noticed in unmodified chitosan—a maximum of 75.43 mg Ag(I)/g. Optimum contact time was 120 min and the process had a maximum efficiency when conducted at pH higher than 6. At the same time, a way is presented to obtain metallic silver from the adsorbent materials used for the recovery of the silver from aqueous solutions.

Advanced Materials Used in SGCC ECCS Flyaway

2011 ◽  
Vol 422 ◽  
pp. 490-496
Author(s):  
Feng Liu ◽  
Jian De Li ◽  
Shu Qing Qi ◽  
Yang Jiao ◽  
Jin Liang Wu
Keyword(s):  
Communication System ◽  
Advanced Materials ◽  
Materials Development ◽  
Materials Used

This article introduces some advanced materials used in SGCC ECCS (emergency command and communication system of state grid), and some materials newly used in this system. It also gives some indication of advanced materials development in SGCC ECCS.

scholarly journals Advanced materials used in wearable health care devices and medical textiles in the battle against coronavirus (COVID-19): A review

2021 ◽  
pp. 152808372110417
Author(s):  
Dalia Saber ◽  
Khaled Abd El-Aziz
Keyword(s):  
Health Care ◽  
Protective Clothing ◽  
Point Of Care ◽  
Health Indicators ◽  
Wearable Devices ◽  
Advanced Materials ◽  
Physiological Indicators ◽  
Medical Textiles ◽  
Materials Used ◽  
Novel Coronavirus

The novel coronavirus disease (COVID-19) has generated great confusion around the world, affecting people’s lives and producing a large number of deaths. The development of portable and wearable devices is of great importance in several fields such as point-of-care medical applications and environmental monitoring. Wearable devices with an ability to collect various types of physiological records are progressively becoming incorporated into everyday life of people. Physiological indicators are essential health indicators and their monitoring could efficiently enable early discovery of disease. This would also help decrease the number of extra severe health problems, in disease avoidance, and lower the overall public sector health cost. Protective clothing is nowadays a main part of textiles classified as technical or industrial textiles. Protective clothing aims to protect its wearer from the harsh environmental impacts that may result in injury or death. Providing protection for the common population has also been taken seriously considering the anticipated disaster due to virus attacks. This review highlights the properties of the materials that are used in wearable health care device and medical textiles.

scholarly journals Strength, sustainability and affordability of bamboo and mud bricks as materials used in local construction

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Leopold Mbereyaho ◽  
Jean de Dieu Mutabaruka ◽  
Abaho G. Gershome ◽  
Armel Ineza ◽  
Ezra Ngirabatware
Keyword(s):  
Compressive Strength ◽  
Cost Estimation ◽  
Building Materials ◽  
Construction Materials ◽  
Conventional Concrete ◽  
Environment Friendly ◽  
Study Results ◽  
Mud Bricks ◽  
Materials Used ◽  
Sisal Fibers

The construction industry is one of the rapidly growing and the cost analysis suggests that the materials cost is constantly increasing. The continuous extraction of aggregates intensively used in the field is negatively acting to the environment. Therefore research in construction materials should focus not only on discovering new alternative materials but also in appreciating the quality of those locally available for their better application. This research aimed at evaluating the performance of bamboo and mud bricks as two available local building materials, especially with regards not only to their strength but also to new performance concepts which are affordability, energy efficiency and environment friendly aspects. The study comprised mainly of laboratory tests of used materials and cost estimation analysis. Study results established that the considered bamboo and mud bricks, made in ordinary soils and reinforced by sisal fibers were reusable, environment friendly materials and energy efficient, with the bamboo showing the thermal conductivity equal to 0.1496 W/mK. Regarding the compressive strength, reinforced mud bricks with sisal fibers showed an increased value from 1.75 MPA to 4.29MPA, what was in line with related previous studies. The average compressive strength of the studied Arundinaria Alpine bamboo was established at 133,7MPA, while its tensile strength was 88.16MPA and these values were reasonable with comparison to other conventional materials. It is recommended that further research in checking the performance of other types of bamboo as well as about new construction technologies be undertaken in order to enhance the service life of both bamboo and mud bricks.Keywords: Affordability, Bamboo, Conventional concrete, Materials strength, Mud reinforced bricks, Sustainability

Experimental Testing of Materials Used in Fused Deposition Modeling Rapid Prototyping Technology

2013 ◽  
Vol 740 ◽  
pp. 597-602 ◽  
Author(s):  
Ludmila Novakova-Marcincinova ◽  
Jozef Novak-Marcincin
Keyword(s):  
Rapid Prototyping ◽  
Fused Deposition Modeling ◽  
Experimental Testing ◽  
Acrylonitrile Butadiene Styrene ◽  
Advanced Materials ◽  
Fused Deposition Modelling ◽  
Initial State ◽  
Fused Deposition ◽  
Materials Used ◽  
Solid Liquid

In this paper are presented information about common and advanced materials used for manufacturing of products by Fused Deposition Modelling (FDM) rapid prototyping technology. In different rapid prototyping technologies the initial state of material can come in either solid, liquid or powder state. The current range materials include paper, nylon, wax, resins, metals and ceramics. In FDM are mainly used as basic materials ABS - Acrylonitrile Butadiene Styrene, polyamide, polycarbonate, polyethylene and polypropylene. Main part of the paper is focused on experimental testing of rapid prototyping materials realized by different research teams and presents outputs of testing of ABS material in FDM technology realized by authors.

Production of Composite Material by FDM Rapid Prototyping Technology

2014 ◽  
Vol 474 ◽  
pp. 186-191 ◽  
Author(s):  
Ludmila Novakova-Marcincinova ◽  
Jozef Novak-Marcincin
Keyword(s):  
Composite Material ◽  
Rapid Prototyping ◽  
Acrylonitrile Butadiene Styrene ◽  
Advanced Materials ◽  
Fused Deposition Modelling ◽  
Experimental Production ◽  
Initial State ◽  
Fused Deposition ◽  
Materials Used ◽  
Solid Liquid

In the paper is presented information about common and advanced materials used for manufacturing of products by Fused Deposition Modelling (FDM) rapid prototyping technology. In different rapid prototyping technologies the initial state of material can come in either solid, liquid or powder state. The current range materials include paper, nylon, wax, resins, metals and ceramics. In FDM are mainly used as basic materials ABS - Acrylonitrile Butadiene Styrene, polyamide, polycarbonate, polyethylene and polypropylene. Main part of the paper is focused on experimental production and testing of composite material produced by rapid prototyping realized by Fused Deposition Modelling (FDM) method and presents outputs of testing of ABS/glass texture material realized by authors.

scholarly journals Advanced materials used for development of lubricated compositions for die casting

2019 ◽  
pp. 70-73 ◽  
Author(s):  
A. M. Mikhaltsov ◽  
A. A. Pivovarchyk ◽  
A. A. Skaskevich
Keyword(s):  
Vegetable Oil ◽  
Die Casting ◽  
Polymer Materials ◽  
Advanced Materials ◽  
Petroleum Jelly ◽  
Ferrous Alloys ◽  
Properties Of Materials ◽  
Conducting Research ◽  
Materials Used ◽  
Lubricating Properties

The article presents the requirements for the lubricants used in die casting of non-ferrous alloys and polymer materials. The methodology for conducting research to determine the lubricating properties of materials, as well as the results of studies of the lubricating qualities of materials used in the development of lubricant compositions for die casting of non-ferrous alloys and polymer products are presented. It is shown that the use of the materials researched under study reduces the effort to extract the metal rod from the casting by 4.5–8.9 times. It has been established that it is advisable to use petroleum jelly and fus (by-product of vegetable oil) as materials used to develop the composition of a lubricant for die-casting non-ferrous alloys and polymer products. The lubricity of these materials is, on average, 28.8–51.2% higher than that of other lubricants studied.

High Strength Concrete with Enhanced Properties by Addition of Chopped Basalt Fibres

2017 ◽  
Vol 908 ◽  
pp. 164-170 ◽  
Author(s):  
Iveta Nováková ◽  
Lenka Bodnárová
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Negative Influence ◽  
Advanced Materials ◽  
Hardened Concrete ◽  
Test Results ◽  
Polypropylene Fibres ◽  
Strength Concrete ◽  
Materials Used ◽  
Temperature Exposure

Use of high strength concrete (HSC) becoming inevitable in case of modern structures, which require application of advanced materials. High strength of concrete can be reached by higher dose of cement or addition of various kinds of fibres as a dispersed reinforcement. In practice are most commonly used steel, glass and polypropylene fibres, but basalt fibres are still under investigation. Basalt is highly resistance to aggressive chemicals and stable in high temperatures in comparison to other materials used for dispersed reinforcement. This study focuses on use of chopped basalt fibres in purpose to enhance properties of harden concrete. Six mixes with various dose of cement and chopped basalt fibres were designed for evaluation of properties of fresh and hardened concrete. As it was expected, chopped basalt fibres have negative influence on workability of fresh concrete but in comparison to other types of fibres the decrease is not that dramatic. Test results indicate increase of compressive strength after 28 days and even higher gain of strength after 90 days in case of mixes with addition of chopped basalt fibres. Reduction of strength due to exposure to 400 and 800 °C is also evaluated and in case of 400 °C temperature exposure the results are very promising.

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