Study on Attenuation Characteristic of Carbon Nanomaterials Smoke to Laser

2013 ◽  
Vol 712-715 ◽  
pp. 215-219
Author(s):  
Hong Xia Wang ◽  
Zi Biao Song ◽  
Dai Zhi Liu
Keyword(s):  
Carbon Nanofibers ◽  
Carbon Nanomaterials ◽  
Infrared Laser ◽  
Test Results ◽  
Test Device ◽  
Attenuation Characteristic ◽  
Nanocarbon Materials ◽  
Passive Interference ◽  
Smoke Chamber ◽  
Mass Concentrations

In order to study the infrared interference characteristics of nanocarbon materials smoke, a large smoke chamber and laser test device were used to measure the attenuation characteristic of carbon nanofibers and nanographites smoke for laser. The mass concentrations were measured to obtain the rate of forming smokescreen for nanocarbon materials, and the smoke transmittance to infrared laser were measured to get attenuation characteristic of nanocarbon materials with different sizes. The test results provide the application basis of nanocarbon materials in passive interference fields.

Application of Optimised Nanocarbon Materials and Biofertilisers as a Potent Superfertiliser: Towards Sustainable Agriculture Production

2021 ◽  
Vol 13 (5) ◽  
pp. 812-819
Author(s):  
Mohamed Helmi Hadj Alouane ◽  
Faheem Ahmed ◽  
Nermin Adel Hussein El Semary ◽  
Munirah F. Aldayel ◽  
Fatimah H. Alhaweti ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Carbon Nanomaterials ◽  
Growth Parameters ◽  
Precipitation Method ◽  
Great Promise ◽  
Sem Images ◽  
Nanocarbon Materials ◽  
Co Precipitation ◽  
Carbon Based Nanomaterials ◽  
Dose Dependent

In this work, carbon-based nanomaterials including; carbon nanotubes (CNT) and graphene were combined with biofertilisers and tested their impact on germination of Hordeum vulgare. The interaction between nanomaterials and biofertilisers was analysed. Scanning electron microscopy (SEM) images revealed that the surface of algal cells was covered with carbon nanomaterials including graphene and CNTs. Raman studies showed the characteristic band of graphene, CNTs and Algal cells. The combination of carbon nanomaterials with biofertilizers resulted in significantly better growth than with nanomaterials individually. To prepare a more effective superfertiliser, zinc ferrites (ZnFe2O4) nanoparticles were added to the nanomaterials-biofertilisers combination. These zinc ferrites nanofertilisers had a size ranging from 8–12 nm and were prepared by co-precipitation method and used at two different doses. The results showed that the growth parameters were increased most significantly with addition of 0.25 ml of ZnFe2O4 nanoparticles. Increasing the dose caused a less increase in growth parameters. These results indicated that increase in growth parameters was dose-dependent. These results demonstrated a great promise for novel formulation of superfertiliser that significantly enhanced plant growth without pollution or excessive use of harmful chemicals for better food security and environmental sustainability.

Carbon Nanomaterials

2019 ◽  
pp. 1-33 ◽  
Author(s):  
Ezgi Ismar ◽  
A.Sezai Sarac
Keyword(s):  
Surface Area ◽  
Carbon Nanofibers ◽  
Industrial Revolution ◽  
Carbon Nanomaterials ◽  
Surface Reactivity ◽  
Synthesis Methods ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

Development of materials always plays a key role in the civilization of the societies. After the industrial revolution, material-based technologies received attention. Nanotechnology has a revolutionary part in the development of industries. Developing technologies cannot be considered without the usage of nanomaterials. Nano-sized materials have different properties than their bulk forms basically because of the increased surface area, surface reactivity, and energy according to decreased size. Carbon-based nanomaterials have a variety of possible application areas from biosensors to aviation. This compact review put a great deal of emphasis on the position of carbon nanomaterials: CNTs, graphene, and carbon nanofibers together with their main synthesis methods and their application areas. The reader can get a quick idea about the basics of CNTs, graphene, and carbon nanofibers and their fabrication techniques.

Research on Transmission Error Test and Analysis of RV Reducer

2019 ◽  
Author(s):  
Zhonggang Zhu ◽  
Jing Zhang
Keyword(s):  
Data Acquisition ◽  
Test Data ◽  
Optimization Design ◽  
Transmission Error ◽  
Test Results ◽  
Test Device ◽  
Filtering Method ◽  
Processing Program ◽  
Rv Reducer ◽  
Data Acquisition And Processing

Abstract Aiming at exactly measuring the transmission error of RV reducer, a set of test device is developed and the data acquisition and processing program is designed using LabVIEW. RV reducers from imported and domestic brands are tested and the test results are compared. The test data is also processed by the filtering method, and the result can show the main source of the transmission error, which providing a reliable reference in the process of optimization design and improving of manufacture technics.

scholarly journals Carbon nanomaterials for supercapacitors: two electrode scheme

2021 ◽  
Vol 340 ◽  
pp. 01035
Author(s):  
Maxim V. Popov ◽  
Alexander G. Bannov ◽  
Stepan I. Yusin
Keyword(s):  
Activated Carbon ◽  
Carbon Nanofibers ◽  
Carbon Nanomaterials ◽  
Electrode Materials ◽  
Carbon Materials ◽  
Expanded Graphite ◽  
Thermally Expanded Graphite ◽  
Rice Hulls ◽  
Texture Characteristics ◽  
Electrodes For Supercapacitors

In this paper, the electrochemical and texture characteristics of electrode materials made of a number of promising carbon materials for supercapacitors were considered. Carbon nanofibers, thermally expanded graphite, and activated carbon derived from rice hulls were used as electrodes for supercapacitors. The paper presents a technique of synthesis of these electrode materials. A comparison of the capacitive characteristics of the electrodes using two-electrode scheme was carried out.

Preparation and Properties of Calcium Doped Carbon Nanofibers Photothermal Reagent

2021 ◽  
Vol 1035 ◽  
pp. 680-686
Author(s):  
Shu Sen Liu ◽  
Jia Mu Dai ◽  
Su Ying Li ◽  
Rong Liu
Keyword(s):  
Carbon Nanofibers ◽  
Photothermal Therapy ◽  
Carbon Nanomaterials ◽  
Photothermal Effect ◽  
X Ray Diffraction ◽  
Dual Effect ◽  
Electrospinning Technique ◽  
X Ray ◽  
Calcium Doped ◽  
Different Content

Recently, carbon nanomaterials illustrated great application prospect in tumor photothermal therapy (PTT). Meanwhile, numerous studies have shown that destruction of calcium homeostasis in cells can also be used as an effective strategy to inhibit tumor. Therefore, dual effect Ca2+ doped carbon nanofibers (PCNFs-Ca) photothermal reagents were prepared by electrospinning technique in this study. The spinnability, morphology and photothermal effect of different content of calcium doped carbon nanofibers were analyzed by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD) and infrared thermometer. The results suggested that a dual effect photothermal reagent with high Ca2+ content was prepared to achieve significant effect in tumor inhibition on the premise of less influence on the photothermal properties of carbon nanofibers.

scholarly journals Laboratory determination of hydraulic anisotropy of dense graded asphalt concrete

2018 ◽  
Vol 38 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Alberto Gaxiola-Hernández
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Point Of View ◽  
Design Stage ◽  
Test Results ◽  
Test Device ◽  
Hydraulic Anisotropy ◽  
Vehicle Loads ◽  
Constant Head

Dense graded asphalt concrete is widely used in roads as support structure for vehicle loads, however, is also used for hydraulic purposes in canal linings as well as faces and cores of dams. In the design stage of these constructions it is necessary to have the permeability data of the materials that will be used and, although in some cases it is sufficient to know this parameter in only one direction, in others it is necessary to have it in two directions. This research presents test results of axial permeability in constant head permeameter and the design a of radial permeability test device in asphalt concrete made for hydraulic purposes. As a result it was determined that the compaction process of asphalt concrete, applied in one direction, causes the material to have anisotropic behavior from the hydraulic point of view, resulting in anisotropy ratios 7.1 to 10.4, for the studied asphalt mixture.

Direct Synthesis of Nanofibrous Nonwoven Carbon Components: Initial Observations, Capabilities and Challenges

2016 ◽  
Author(s):  
Mark A. Atwater ◽  
Roger J. Welsh
Keyword(s):  
Carbon Nanofibers ◽  
Carbon Nanomaterials ◽  
Carbon Nanofiber ◽  
Direct Synthesis ◽  
Nonwoven Material ◽  
Proof Of Concept ◽  
Cross Sectional ◽  
Nonwoven Materials ◽  
Selective Placement ◽  
Monolithic Structures

Wide-spread adoption of carbon nanomaterials has been hindered by inefficient production and utilization. A recently developed method has shown possibility to directly synthesize bulk nanostructured nonwoven materials from catalytically deposited carbon nanofibers. The basic manufacturing scheme involves constraining carbon nanofiber growth to create three-dimensionally featured, macroscale products. Although previously demonstrated as a proof of concept, the possibilities and pitfalls of the method at a larger scale have not yet been explored. In this work, the basic foundation for using the constrained formation of fibrous nanostructures (CoFFiN) process is established by testing feasibility in larger volumes (as much as 2000% greater than initial experiments) and by noting the macroscale carbon growth characteristics. It has been found that a variety of factors contribute to determining the basic qualities of the macroscale fiber collection (nonwoven material), and there are tunable parameters at the catalytic and constraint levels. The results of this work have established that monolithic structures of nonwoven carbon nanofibers can be created with centimeter dimensions in a variety of cross-sectional shapes. The only limit to scale noted is the tendency for nanofibers to entangle with one another during growth and self-restrict outward expansion to the mold walls. This may be addressed by selective placement of the catalyst in the mold.

scholarly journals Electrical properties of compacted carbon nanomaterials

2021 ◽  
Vol 340 ◽  
pp. 01047
Author(s):  
Nikita I. Lapekin ◽  
Artem A. Shestakov ◽  
Andrey E. Brester ◽  
Arina V. Ukhina ◽  
Alexander G. Bannov
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Carbon Nanofibers ◽  
Carbon Nanomaterials ◽  
Frequency Range ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Cylindrical Samples

In this paper, the electrical properties of various compacted carbon nanomaterials were investigated. Compacted carbon nanomaterials (carbon nanofibers, multi-walled carbon nanotubes) were compacted into cylindrical samples and the electrical properties were measured in a frequency range from 50 Hz to 1MHz.

scholarly journals Numerical and Experimental Investigation of Deployment Behaviour of Folded Fin Mechanism based on the Dynamic Loading Conditions

2020 ◽  
Author(s):  
MURAT AVCI ◽  
ÖZER TAGA ◽  
ÖMER KELEŞ
Keyword(s):  
High Speed ◽  
Numerical Models ◽  
Test Results ◽  
Test Device ◽  
Camera System ◽  
Mechanism Model ◽  
Body Dynamics ◽  
Deployment Time ◽  
Dynamic Loading Conditions ◽  
Multi Body

Abstract In this study, the friction and damping values ​​that arise during the deployment of the folded fin mechanism were obtained based on the experimental data. Although there are recommended values ​​for friction in the literature, damping is a phenomenon that varies from system to system and must be obtained through test data. In this study, firstly, the mechanism was operated on the test device with a specific drive pressure and the actual drive pressure generated in the system was measured. The dynamic behaviour of the mechanism was recorded by a High-Speed camera system as well. Adams MBD (multi-body dynamics) was used to define the mechanism model and drive pressure data from the test was defined as input to the model. With the help of Adams DOE (Design of Experiments), certain intervals were defined for friction and damping, multiple analyses were carried out at the friction and damping intervals defined and total deployment time of the mechanism and the dynamic behaviours it exhibited during deployment were obtained. From these numerical results obtained, friction and damping values ​​were obtained based on the model with the highest correlation and test results. The same mechanism was tested for different drive pressures with the specified friction and damping values ​​and the results were compared to the numerical models. It was decided that the friction and damping values ​​determined as a result of the comparison could be used in future numerical analyses.

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