Investigation on Properties of Bentonite Type in Cold Bonded Pelletization of Flue Dust

2011 ◽  
Vol 409 ◽  
pp. 743-748
Author(s):  
Guan Jhou Chen ◽  
Weng Sing Hwang ◽  
Shih Hsien Liu ◽  
Jaw Min Chou
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Electrostatic Precipitator ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Raw Material ◽  
Size Analysis ◽  
Average Particle ◽  
Fixed Amount ◽  
Flue Dust

In the integrated steel mills fabrication processes, the by-product of flue dust and electrostatic precipitator dust were found to be rich with large amounts of iron and carbon content and it could be recycled as a raw material for blast furnaces. In this study, we use the “Cold-bonded Pellet; CBP” technique to prepare the recycling samples for subsequent processing. Therefore, this study investigated under a fixed amount of bentonite added, the choice of different types of bentonite on the powder granulation performance and strength of particle duration effects, bentonite used as a basis for adjustment. The results showed that Bentonite samples of the granulation efficiency increase, relative to its yield and the rate of sticky increase. In general, CBP particle compressive strength increased, duration have increased, and found that curing condition B are large than the A method. In addition, by particle size analysis results show that, bentonite average particle size of 11-12μm have better compressive strength. Comprehensive assessment of granulation and mechanical properties, of which A label in four Bentonite can be preferred.

scholarly journals Effect of Nanosized Colloidal Copper on Cotton Fabric

2010 ◽  
Vol 5 (3) ◽  
pp. 155892501000500 ◽  
Author(s):  
D.P. Chattopadhyay ◽  
B.H. Patel
Keyword(s):  
Particle Size ◽  
Cotton Fabric ◽  
Colloidal Solution ◽  
Chemical Reduction ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Nano Particles ◽  
Size Analysis ◽  
Average Particle ◽  
Sem Images

This research deals with the synthesis of nanosized copper as colloidal solution and its application to cotton fabric. Copper nano colloids were prepared by chemical reduction of copper salt using sodium borohydride as reducing agent in presence of tri-sodium citrate. The size and size distribution of the particles were examined by particle size analyzer and the morphology of the synthesized particles was examined by SEM and AFM techniques. X-ray fluorescence spectroscopy detected the presence of copper in the treated fabric. The results of particle size analysis showed that the average particle size varied from 60 nm to 100 nm. The nano copper treated cotton was subjected to soil burial test for the assessment of its resistance towards microbial attack. SEM images of treated fabric indicate copper nano particles are well dispersed on the surface of the specimens. The treatments of nano copper colloidal solution on cotton not only improve its antimicrobial efficiency but also influenced the tensile strength of the fabric sample positively. The treatment was found to enhance the color depth and fastness properties of direct dyed cotton fabric samples.

scholarly journals INVESTIGATION ON DISSOLUTION PATTERN AND MATHEMATICAL MODELING OF DRUG RELEASE OF QUERCETIN BY COMPLEXATION WITH CYCLODEXTRIN NANOSPONGES

2019 ◽  
pp. 260-264
Author(s):  
SOBITHARANI P ◽  
ANANDAM S ◽  
MOHAN VARMA M ◽  
VIJAYA RATNA J ◽  
SHAILAJA P
Keyword(s):  
Particle Size ◽  
Drug Release ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Water Soluble ◽  
Size Analysis ◽  
Average Particle ◽  
Scattering Method ◽  
Release Pattern ◽  
Cyclodextrin Nanosponges

Objective: The main objective of this study was to investigate the release pattern of a poorly water-soluble drug quercetin (QU) by fabricating its cyclodextrin nanosponges. Methods: Characterization of the original QU powder and QU-loaded nanosponges was carried out by the Fourier-transformed infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), and dissolution tester. The drug release pattern was subjected to various kinetic models. Results: FTIR studies confirmed the formation of inclusion complex of drug. The particle size analysis revealed that the average particle size measured by laser light scattering method is around 400–420 nm with low polydispersity index. The particle size distribution is unimodal and having a narrow range. A sufficiently high zeta potential indicates that the complexes would be stable and the tendency to agglomerate would be miniscule. TEM image revealed the porous nature of nanosponges. The dissolution of the QU nanosponges was significantly higher compared with the pure drug. Conclusion: From the kinetic study, it is apparent that the regression coefficient value closer to unity in case of Korsmeyer-Peppas model indicates that the drug release exponentially to the elapsed time. n value obtained from the Korsmeyer-Peppas plots, i.e., 0.9911 indicating non-Fickian (anomalous) transport ; thus, it projected that delivered its active ingredient by coupled diffusion and erosion.

Synthesis and Characterization of Polyimide/Silica Nanocomposites

2011 ◽  
Vol 311-313 ◽  
pp. 96-100
Author(s):  
Jian Li Cheng ◽  
Cun Zhou ◽  
Hao Peng ◽  
Huan Wang ◽  
Yu Sun
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Amic Acid ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Scanning Calorimetry ◽  
Silica Nanocomposites ◽  
Transmission Electron ◽  
Size Of Particles

Two kind of polyimide/silica nanocomposites which were recorded poly(amic acid)/ silica(PAA/SiO2) and SiO2in poly(amic acid) ammonium salt(PAS/SiO2) respectively, have been prepared for different methods. The size of SiO2in PAA/SiO2and PAS/SiO2are measured by Particle size analysis and the average particle size are 377nm and 53.7nm. Transmission electron microscopy(TEM) images of PAS/ SiO2confirm that the size of particles are ranged from 40 to 80nm. The stuctures of samples have been characterized by FT-IR spectra. The thermal stability of PAA/SiO2and PAS/SiO2are studied by thermogravimetric analysis (TGA) and the thermal behaviors were investigated by differential scanning calorimetry (DSC) in this paper. It is shown that PAA/SiO2have slightly better thermal properties than that of PAS/SiO2. The results obtained from Instron universal strength tester present the water-solube PAS/SiO2own the excellent mechanical prperties as same as PAA/SiO2.

Influence of Fineness on Activity Index of Blast Furnace Slag with Different SiO2/Al2O3

2015 ◽  
Vol 814 ◽  
pp. 579-582
Author(s):  
Su Ping Cui ◽  
Ling Ling Liu ◽  
Ya Li Wang ◽  
Hui Wang ◽  
Shi Jie Dong
Keyword(s):  
Particle Size ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Activity Index ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Furnace Slag ◽  
Activity Indices

Granulated blast furnace slag (GBFS) is a by-product of ironmaking and widely used in the cement and concrete. GBFS samples with different ratio of SiO2/Al2O3 were prepared under the laboratory conditions and ground by the agate ball mill at different times. Then they were characterized by laser particle size analysis (LPSA), scanning electron microscopy (SEM), Bertrand surface method and mechanical testing. It was found that the activity index of GBFS clearly increased with the decrease of the GBFS particle size. In the case of the average particle size about 32μm, the activity indices were irregular with the increase of SiO2/Al2O3 ratio, whereas for the average particle size about 11μm, the activity indices decreased with the increase of SiO2/Al2O3 ratio.

Preparation and Characterization of Bone Cements Incorporated with Montmorillonite

2007 ◽  
Vol 342-343 ◽  
pp. 753-756
Author(s):  
Sun Yeon Lee ◽  
Sung Soo Kim
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Average Particle Size ◽  
Gel Permeation Chromatography ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Bone Cements ◽  
Liquid Component ◽  
Powder Component

Bone cements incorporated with montmorillonite (MMT) were prepared in an attempt to improve their mechanical properties. The cements were characterized using particle size analysis, gel permeation chromatography, viscosity measurements, X-ray diffraction, transmission electron microscopy, and mechanical properties. The average particle size and molecular weight of the PMMA powders used were 47 μm and 100,000 g/mol, respectively. The incorporation of MMT led to an increase in viscosity of the bone cement but did not severely affect its setting temperature or the amount of residual monomer. Regardless of the MMT mixing methods used, in this case MMT being mixing in liquid and powder components, sodium MMT (SMMT) was not well dispersed in the bone cements, which was believed to be due to its hydrophilicity. Organophilic MMT (OMMT) was better dispersed in the liquid component than in the powder component. The tensile and compressive strengths of the bone cements with 0.5 wt% OMMT mixed in the liquid component were 35.9 and 119.6 MPa, respectively, which were considerably higher than those of the bone cements with 0.5 wt% OMMT mixed in the powder component (27.9 and 100.5 MPa, respectively).

scholarly journals Preparation of the monodispersed carboxyl-functionalized polymer microspheres with disproportionated rosin moiety and adsorption of methylene blue

2018 ◽  
Vol 36 (5-6) ◽  
pp. 1260-1273 ◽  
Author(s):  
Cai-Li Yu ◽  
Feng Bian ◽  
Shu-Fen Zhang ◽  
Xu Xu ◽  
Peng Ren ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Raw Materials ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Polymer Microspheres ◽  
Carboxyl Content ◽  
Methylene Blue Adsorption

Carboxyl-functionalized polymer microspheres with a rosin moiety were prepared through dispersion polymerization using styrene, disproportionated rosin ester, and methylacrylic acid as raw materials. The effects of dispersion medium (ethanol/water) ratio, monomer mass proportion and initiator concentration on the polymer microspheres were studied. Scanning electron microscopy, laser particle size analysis, thermogravimetric analysis and Fourier transform infrared spectroscopy were used to characterize the microspheres, and their carboxyl contents were determined by the conductance titration method. The adsorption of methylene blue of the microspheres was also investigated. The results showed that rosin-based carboxyl-functionalized polymer microspheres were successfully synthesized. The microspheres exhibited smooth, spherical shapes with good monodispersity and high thermal stability. The carboxyl content of the microspheres prepared under optimum conditions was 0.089 mmol·g−1, with the average particle size approximately 950 nm. With increasing carboxyl contents of the polymer microspheres, their methylene blue adsorption capacities increased. The maximum methylene blue adsorption capacity of the microspheres was 59.55 mg·g−1 in the highest carboxyl content.

Evaluation of poly(methyl methacrylate) latex nanoparticles used in water-based drilling fluids

e-Polymers ◽  
2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiaodong Bai ◽  
Xu Wang ◽  
Xiaolin Pu
Keyword(s):  
Particle Size ◽  
Methyl Methacrylate ◽  
Average Particle Size ◽  
Gel Permeation Chromatography ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Polymerization Temperature ◽  
Drilling Fluids ◽  
Average Particle ◽  
Microemulsion Polymerization

Abstract In the prospecting and drilling processes of gas and oil, if added into the drilling fluids, the latex nanoparticles can improve the performance of the drilling fluids. In this paper, methyl methacrylate (MMA) acts as a monomer and the combination emulsifier is a certain proportion of OP-10, RH and T-80. PMMA latex nanoparticles have been polymerized through the method called microemulsion polymerization. The conditions of methyl methacrylate microemulsion polymerization have been discussed and optimized. The dosage of emulsifier is 5 wt.%, polymerization temperature is 75 0C, and the stirring rate is 100 rpm. The particle shape, granularity distribution and molecular weight have been characterized by transmission electron microscope, laser particle size analysis device and gel permeation chromatography, respectively. The results indicate that the PMMA particles are ball like, showing average particle size of 65 nm, and that the MW is about 437,140. Results show that PMMA latex has strong inhibitive function on the shale swelling. When the latex is added into the drilling fluids, the filter loss decreases dramatically; and the PMMA latex drilling fluids system can be used when the temperature is below 180 0C.

scholarly journals Preparation and Characterization of Amorphous B Powders by Salt-Assisted SHS Technique

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Yujing Ou ◽  
Peiqing La ◽  
Dandan Zhu ◽  
Yalong Zhu
Keyword(s):  
Particle Size ◽  
Combustion Temperature ◽  
Average Particle Size ◽  
Reaction System ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
Selected Area Electron Diffraction ◽  
Calculation Results ◽  
Adiabatic Combustion Temperature

To use the salt-assisted SHS technique to prepare B powders was proposed. Calculation results found that the adiabatic combustion temperature of the B2O3-Mg reaction system was 2604 K, higher than the 1800 K criterion of self-propagating temperature, which meant that the SHS application was feasible. When 0, 10%, 20%, 30%, 40%, 50%, and 60% NaCl content were added, the adiabatic combustion temperature of the reaction system decreased linearly. When 60% NaCl content was added, the adiabatic combustion temperature was 1799 K (lower than 1800 K), unsuitable for self-propagating reaction, which was consistent with the experimental results. Through scanning electron microscope (SEM), energy disperse spectroscopy (EDS), and particle size analysis, the influence of different addition of NaCl on the morphology, average particle size, and purity of prepared B powder was investigated. EDS and chemical analysis indicated that the purity of prepared B powder was over 96% and the average particle size was within the range of 0.4~0.8 μm when the content of NaCl was 50%. The analysis of X-ray diffraction (XRD) and selected area electron diffraction (SAED) proved that the prepared B powder was amorphous.

Nanostructured alumina doped TiO2 ceramics for gas sensors

2005 ◽  
Vol 900 ◽  
Author(s):  
Young Jin Choi ◽  
Amit Bandyopadhyay ◽  
Susmita Bose
Keyword(s):  
Particle Size ◽  
Anatase Phase ◽  
Average Particle Size ◽  
Combustion Method ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Auto Combustion ◽  
Average Surface Area

ABSTRACTNanostructured TiO2 based ceramics were synthesized using citrate-nitrate auto combustion method with different concentrations of aluminum oxide as dopant. The powder x-ray diffraction data showed that synthesized TiO2 powders, pure as well as alumina doped TiO2 had anatase phase. Dopant concentration was varied between 0 and 15 wt%. Particle size analysis showed that the particle size was in the range of 50 to 80nm for nanosized TiO2 calcined between 600 and 800°C. Average particle size of doped powders was generally less than pure TiO2. BET specific average surface area was between 10 and 25 m2/g. Doping upto 10wt% alumina is not effective in retarding anatase crystallite growth. The resistance of Al doped TiO2 sample is found to be lower than that of pure TiO2. Al2O3 doped TiO2 sensor was found to be selective to CO sensing at an operating temperature of 600 °C.

Development of Smart Nanocontainers With A Zinc Phosphate Core and A pH-Responsive Shell for Controlled Release of Immidazole

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Ananda Jaysing Jadhav ◽  
Sammit Ekanath Karekar ◽  
Dipak Vitthal Pinjari ◽  
Yogesh Gajanan Datar ◽  
Bharat Apparao Bhanvase ◽  
...  
Keyword(s):  
Particle Size ◽  
Polyacrylic Acid ◽  
Zinc Phosphate ◽  
Average Particle Size ◽  
Particle Size Analysis ◽  
Core Material ◽  
Size Analysis ◽  
Average Particle ◽  
Layer By Layer ◽  
Vis Spectroscopy

AbstractA simple and flexible method has been developed to fabricate reversibly switchable nanocontainers (by layer by layer assembly) using zinc phosphate (ZP) nanoparticles as a core material and subsequent deposition of oppositely charged species of polyelectrolyte (polyaniline and polyacrylic acid) and organic corrosion inhibitor (immidazole). Immidazole was entrapped between polyaniline (PANI) and polyacrylic acid (PAA). The PAA nanovalve can control the access of immidazole molecules to and from the nanocontainers. The average particle size of the synthesized nanocontainer was found to be in the range of 250–500 nm. X-ray diffraction (XRD), particle size analysis (PSA), zeta potential, and fourier transform infrared spectroscopy (FTIR) analysis confirms the successful formation of the layered structure of nanocontainers. UV-vis spectroscopy was used to analyze the release rate of immidazole in media of different pH as a function of time. This core-shell nanostructure can have potential applications in corrosion inhibition paint formulation.

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