scholarly journals Parameters Affecting Coating Uniformity of Alkali -Activated Material Coated Fertilizer

2018 ◽  
Vol 7 (3.26) ◽  
pp. 33
Author(s):  
Luqman Hakim H ◽  
Ku. Zilati KZ. ◽  
Muhammad Harris N.
Keyword(s):  
Coating Thickness ◽  
Steel Structures ◽  
Coating Material ◽  
Engineering Industry ◽  
Offshore Platforms ◽  
Coating Materials ◽  
Coated Urea ◽  
Two Parameters ◽  
Alkali Activated ◽  
Urea Granules

The establishment of Controlled Release Urea (CRU) in agriculture industry has given a great significant outcome towards the development of economy while preserving the environment. As it is developed through a coating process, it does not only help to increase fertilizer’s efficiency, but also minimize the loss of nutrients into the soil and environmental pollution. There are many types of coating materials that have been extensively studied as well as applied in everyday life from pharmaceutical industry to engineering industry such as in pharmaceutical tablet, road construction and corrosion control of steel structures like offshore platforms. In this research, the alkali-activated material composite has been developed as a new coating material and is introduced as the main coating material for the CRU. In term of environmental friendliness, alkali-activated material (AAM) is  considered better than sulphur and polymer. However, the combination of fly ash and sodium hydroxide (NaOH) solution producing the AAM paste needs further research since it can be categorized as a novel coating material for CRU. It is also to ensure the suitability of it to be used as a coating material on urea fertilizer. A significant coating thickness along with good hardness strength can produce promising coated urea granules characteristics. Two parameters have been studied for this research to identify its effect towards coating thickness and hardness strength of coated urea granules which are inlet air pressure and spraying rate. These two parameters are identified to be crucial in enhancing the characteristics of coated urea granules.  

scholarly journals Comparative effect of various organic extracts coated urea fertilizer on the release pattern of Ammonium and Nitrate in the soil at different time intervals

2021 ◽  
Author(s):  
Adeel Ahmad ◽  
Muhammad Yaseen ◽  
Hafiz Naeem Asghar ◽  
Shahzad Maqsood Ahmed Basra
Keyword(s):  
Fertilizer Application ◽  
Cow Dung ◽  
Nitrification Inhibitors ◽  
Neem Oil ◽  
Coating Materials ◽  
N Losses ◽  
Randomized Design ◽  
Coated Urea ◽  
And Control ◽  
Urea Granules

Abstract Nitrogen (N) fertilizer application is a very important commodity in agricultural systems. However, due to the losses of applied N from the soil microenvironment its efficiency is too low. Different strategies like the use of polymer coating and use of chemical nitrification inhibitors had been employed to reduce N losses. But these chemical nitrification inhibitors are very expensive. Thus, a study was conducted to investigate the effects of different concentrations of parthenium extract, neem oil and acidulated cow dung compost extract on N dynamics in the soil. Three concentrations of parthenium extract (5, 10 and 15 %) and neem oil (1, 2 and 3 %) were coated on urea granules after mixing with the polymer material. Three pH (2, 4 & 6 pH) based acidulated cow dung compost extracts were also coated on urea granules in the same pattern. These coated fertilizers and uncoated urea were applied in jars filled with soil (100g per jar) at the rate of 1g of fertilizer per jar. One treatment was kept as control (without any fertilizer). Treatments along three replications were arranged according to the completely randomized design (CRD). Results depicted that all coating materials caused the release of N consistently from applied fertilizers compared to uncoated treatment. In addition, percent nitrified N was also reduced significantly in coated treatments in comparison to the uncoated urea and control treatments. However, the level of concentration effect was not obvious as lower concentrations of these extracts and oil also performed almost equal to that of higher concentrations.

Wear of Coated Cutting Tool Based on AdvantEdge

2014 ◽  
Vol 551 ◽  
pp. 221-227
Author(s):  
Zhi Qiang Zhang ◽  
Tie Qiang Gang ◽  
Yi Kai Yi
Keyword(s):  
Wear Rate ◽  
Coating Thickness ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Simulation Software ◽  
Machining Process ◽  
Sliding Velocity ◽  
Coating Materials ◽  
Element Simulation ◽  
Coated Tool

In this paper, based on finite element simulation software AdvantEdge, the effects of different coating materials and thickness on the wear of cutting tools during the machining process have been studied. For the tools with coating materials of TiAlN, Al2O3, TiN, TiC, we can calculate the wear rate according to the Usui mathematical model of tool wear, and then consider thickness factor of TiC coating. Because of the lowest thermal conductivity, the workpiece cut by TiC coated tool will soften first and more over cutting time, it result in the lowest wear rate. And with the increase of coating thickness, the effect of "thermal barrier" is more obvious for the relatively thicker coating tool, but the relative sliding velocity between the chip and tool is increasing meanwhile, so a suitable coating thickness is necessary.

scholarly journals Methods of Controlling Lift - off in Conductivity Invariance Phenomenon for Eddy Current Testing

2020 ◽  
Author(s):  
Zhongwen Jin ◽  
Yuwei Meng ◽  
Rongdong Yu ◽  
Ruochen Huang ◽  
Mingyang Lu ◽  
...  
Keyword(s):  
Linear Relationship ◽  
Eddy Current ◽  
Coating Thickness ◽  
Test Sample ◽  
Common Point ◽  
Coil Design ◽  
Current Testing ◽  
Lift Off ◽  
Two Parameters ◽  
The Relationship

<p>Previously, a conductivity invariance phenomena (CIP) has been discovered – at a certain lift-off, the inductance change of the sensor due to a test sample is immune to conductivity variations, i.e. the inductance – lift-off curve passes through a common point at a certain lift-off, termed as conductivity invariance lift-off. However, this conductivity invariance lift-off is fixed for a particular sensor setup, which is not convenient for various sample conditions. In this paper, we propose using two parameters in the coil design – the horizontal and vertical distances between the transmitter and the receiver to control the conductivity invariance lift-off. The relationship between these two parameters and the conductivity invariance lift-off is investigated by simulation and experiments and it has been found that there is an approximate linear relationship between these two parameters and the conductivity invariance lift-off. This is useful for applications where the measurements have restrictions on lift-off, e.g. uneven coating thickness which limits the range of the lift-off of probe during the measurements. Therefore, based on this relationship, it can be easier to adjust the configuration of the probe for a better inspection of the test samples.</p>

Study of the System Wood – Coating Material. I. Wood – Liquid Coating Material

Holzforschung ◽  
2000 ◽  
Vol 54 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Eva Liptáková ◽  
Jozef Kúdela ◽  
Ján Sarva
Keyword(s):  
Phase Boundary ◽  
Rheological Properties ◽  
Wood Surface ◽  
Surface Forces ◽  
Coating Material ◽  
Actual State ◽  
Wood Coating ◽  
Coating Materials ◽  
Wetting Process ◽  
Adhesion Work

Summary This paper deals with the evaluation of wood—wetting process with coating materials on the basis of interactions of surface forces on phase boundary. The obtained results are compared with the actual state in the system wood—coating material. Primary ability of coating materials—spontaneous spreading over the wood surface has been proved. There is also the secondary influence of rheological properties of coating materials causing deformations of the phase boundary, non-perfect wetting of the wood surface and apparent lowering of adhesion work. The influence of rheological properties has been expressed by using the coefficient F the meaning of which follows from the comparison between results of adhesion work computed according to modified Young-Dupré equation and of adhesion work determined on the basis of the interactions of surface forces on the phase boundary between wood and liquid coating materials. A direct dependence between the values of the coefficient F and coating materials viscosity has been proved.

scholarly journals Development of Urea Coated with Neem (Azadirachta indica) to Increase Fertilizer Efficiency and Reduce Greenhouse Gases Emission

2014 ◽  
Vol 69 (5) ◽  
Author(s):  
Yusminah Hala ◽  
Oslan Jumadi ◽  
Abd. Muis ◽  
Hartati Hartati ◽  
Kazuyuki Inubushi
Keyword(s):  
Greenhouse Gases ◽  
Azadirachta Indica ◽  
Leaf Length ◽  
Fertilizer Efficiency ◽  
Nitrification Rate ◽  
N2o Emissions ◽  
Nitrification Inhibition ◽  
Soil Co2 ◽  
Coated Urea ◽  
Urea Granules

Urea coated with neem fertilizer is one of the solutions to increase the efficiency of nitrogen fertilizer and reduce greenhouse gases emission. Inhibition of the nitrification rate of urea can reduce NO3‒ and N2O gas, and at the same time urea can be efficiently absorbed by the plants. Neem (Azadirachta indica) can suppress nitrification rate of 20-50%, which is slightly lower than that of dyciandiamide (DCD) (56-80%). Coating of urea granules was done by dipping urea granules in 1% neem oil, exposed it to 2.5% and 5% neem cake and then homogenized by rotation. The results were compared to urea coated with 5% DCD. The efficiency of fertilizer and nitrification inhibition were measured by nitrate and ammonium changes and fluxes of N2O gas. The results showed that application of  urea coated with 5% neem on cabbage plants yielded the highest plant height. However, the leaf length and width were not significantly different with other urea treatments. Application of urea coated neem reduced nitrification rate and N2O emissions in the soil. Soil CO2’s levels treated either with 2.5% or 5% neem coated urea showed the lowest levels of CO2 soil. This suggests that neem can reduce N2O and CO2 emissions from urea fertilizer as well as the capacity to reduce nitrification rate.

scholarly journals Performance-Based Analysis of Single-Layer Cylindrical Steel Reticulated Shells in Fire

2020 ◽  
Vol 10 (9) ◽  
pp. 3099
Author(s):  
Zhiwei Yu ◽  
Chen Lu ◽  
Yiqin Zhong
Keyword(s):  
Fire Resistance ◽  
Rapid Development ◽  
Single Layer ◽  
Steel Structures ◽  
Temperature Fields ◽  
Fe Model ◽  
Fire Dynamics ◽  
Interior Space ◽  
Coating Materials ◽  
Fire Scenarios

With the rapid development of architectural technology, long-span structures have been widely used due to their vast interior space and beautiful architectural composition. Due to the characteristics and high costs of coating materials on large steel structures, fire resistance designs for these kinds of structures have become more and more important. This paper presents comprehensive case analyses of the fire performance of single-layer cylindrical reticulated shells. Nonuniform fire temperature fields of single-layer cylindrical reticulated shells in different fire scenarios were generated using a Fire Dynamics Simulator (FDS). The influences of different parameters on the air temperature field during a fire in a reticulated shell structure were analyzed. A Finite Element (FE) model was developed using the FE software ABAQUS to model the structural behavior of single-layer cylindrical reticulated shells in different fire scenarios. The effects of various parameters on the responses of single-layer cylindrical reticulated shells during a fire were investigated. Using the results from the performance-based analysis in this research, we propose some recommendations for fire resistance designs for single-layer cylindrical reticulated shells.

scholarly journals Coating Matters: Review on Colloidal Stability of Nanoparticles with Biocompatible Coatings in Biological Media, Living Cells and Organisms

2018 ◽  
Vol 25 (35) ◽  
pp. 4553-4586 ◽  
Author(s):  
Jonas Schubert ◽  
Munish Chanana
Keyword(s):  
Colloidal Stability ◽  
Biological Fluids ◽  
Chemical Properties ◽  
Coating Material ◽  
Living Systems ◽  
Biological Media ◽  
Coating Materials ◽  
Physico Chemical ◽  
Environment Temperature ◽  
To Come

Within the last two decades, the field of nanomedicine has not developed as successfully as has widely been hoped for. The main reason for this is the immense complexity of the biological systems, including the physico-chemical properties of the biological fluids as well as the biochemistry and the physiology of living systems. The nanoparticles’ physicochemical properties are also highly important. These differ profoundly from those of freshly synthesized particles when applied in biological/living systems as recent research in this field reveals. The physico-chemical properties of nanoparticles are predefined by their structural and functional design (core and coating material) and are highly affected by their interaction with the environment (temperature, pH, salt, proteins, cells). Since the coating material is the first part of the particle to come in contact with the environment, it does not only provide biocompatibility, but also defines the behavior (e.g. colloidal stability) and the fate (degradation, excretion, accumulation) of nanoparticles in the living systems. Hence, the coating matters, particularly for a nanoparticle system for biomedical applications, which has to fulfill its task in the complex environment of biological fluids, cells and organisms. In this review, we evaluate the performance of different coating materials for nanoparticles concerning their ability to provide colloidal stability in biological media and living systems.

scholarly journals Silicone Resin Coating of Micro-Sized Ferrite Particles Using Supercritical Carbon Dioxide

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2012
Author(s):  
Idzumi Okajima ◽  
Tatsuya Kanie ◽  
Takeshi Sako
Keyword(s):  
Film Thickness ◽  
Organic Solvents ◽  
Supercritical Co2 ◽  
Fine Particles ◽  
Particle Diameter ◽  
Coating Material ◽  
Silicone Resin ◽  
Coating Film ◽  
Coating Materials ◽  
Coating Method

An environmentally friendly and efficient polymer coating method for micro-sized particles was developed using supercritical CO2. Because this method used supercritical CO2 as the solvent to dissolve the coating material, we avoided environmental pollution from organic solvents, saved the energy required to evaporate/remove organic solvents, realized a uniform coating film on the fine particles, and prevented agglomeration of the coating particles. The solubilities of the five silicone resins used as coating materials were measured using the flow method, and the data were well correlated by Chrastil’s equation with an average deviation of 5.7%. Resins comprising numerous methyl-group side chains exhibited high solubilities and were suitable coating materials. A new semi-flow-type coating method using supercritical CO2 was also developed, which deposited a film with a uniform thickness of 0.2–1.3 μm on whole fine particles. Notably, in this method, the film thickness was easily controlled. A simple and rapid technique was developed for measuring the coating thickness using X-ray fluorescence analysis. The model for calculating the coating film thickness was based on the material balance of the coating material. This model satisfactorily predicted the thickness with an average error of 0.085 μm by measuring the solubility of the coating material in supercritical CO2, integrated flow volume of supercritical CO2, particle diameter, density and charged weight of the fine particle, and coating material density.

scholarly journals Silicone Resin-Based Intumescent Paints

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4785
Author(s):  
Maria Zielecka ◽  
Anna Rabajczyk ◽  
Krzysztof Cygańczuk ◽  
Łukasz Pastuszka ◽  
Leszek Jurecki
Keyword(s):  
Heat Resistance ◽  
Expanded Graphite ◽  
Steel Structures ◽  
Silicone Resin ◽  
Hydroxyl Groups ◽  
The Novel ◽  
Coating Materials ◽  
Good Heat Resistance ◽  
Good Heat

Silicone resins are widely applied as coating materials due to their unique properties, especially those related to very good heat resistance. The most important effect on the long-term heat resistance of the coating is connected with the type of resin. Moreover, this structure is stabilized by a chemical reaction between the hydroxyl groups from the organoclay and the silicone resin. The novel trends in application of silicone resins in intumescent paints used mostly for protection of steel structures against fire will be presented based on literature review. Some examples of innovative applications for fire protection of other materials will be also presented. The effect of silicone resin structure and the type of filler used in these paints on the properties of the char formed during the thermal decomposition of the intumescent paint will be discussed in detail. The most frequently used additives are expanded graphite and organoclay. It has been demonstrated that silicate platelets are intercalated in the silicone matrix, significantly increasing its mechanical strength and resulting in high protection against fire.

scholarly journals Pyrraline Formation Modulated by Sodium Chloride and Controlled by Encapsulation with Different Coating Materials in the Maillard Reaction

Biomolecules ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 721
Author(s):  
Liang ◽  
Chen ◽  
Yang ◽  
Lai ◽  
Yang ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Maillard Reaction ◽  
Gum Arabic ◽  
Coating Material ◽  
Model Systems ◽  
Simultaneous Increase ◽  
Maize Starch ◽  
Coating Materials ◽  
Normal Maize ◽  
High Amylose

Advanced glycation end products (AGEs), which are present in heat-processed foods, have been associated with several chronic diseases. Sodium chloride (NaCl) modulates the formation of furfurals and acrylamide in the Maillard reaction; however, the effects of NaCl on AGE formation are inconsistent. In this study, we investigated the effects of NaCl on pyrraline formation using glucose-lysine model systems. NaCl, especially at 0.50%, promoted Maillard browning and pyrraline formation, with a simultaneous increase in the 3-deoxyglucosone concentration. To reduce the rate of pyrraline formation, NaCl coated with different gums and starches were used. The results showed that NaCl encapsulation is an effective approach to mitigate pyrraline and 3-deoxyglucosone formation. The content of NaCl in the microparticles were 284 ± 12, 269 ± 6, 258 ± 8, 247 ± 10, 273 ± 16, and 288 ± 15 mg/g (coated with waxy maize starch, normal maize starch, HYLON VII high amylose maize starch, gelatinized resistant starch, xanthan gum, and gum arabic, respectively). The heat resistance of the coating material was negatively correlated with the pyrraline and 3-deoxyglucosone formation, whereas the solubility of the coating material had the opposite results. Coating the material with gum had little effects on the reduction of pyrraline and 3-deoxyglucosone.

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