Preparation and characterization of highly transparent hydrophobic nanocellulose film using corn husks as main material

2020 ◽  
Vol 158 ◽  
pp. 781-789 ◽  
Author(s):  
Qifeng Chen ◽  
Jieyi Xiong ◽  
Guangxue Chen ◽  
Taiyan Tan
Keyword(s):  
Nanocellulose Film ◽  
Main Material

Preparation and Characterization of TiO2 Nanoparticles / CNTs Composite Particles

2012 ◽  
Vol 268-270 ◽  
pp. 172-175
Author(s):  
Ming Qiu Wang ◽  
Jun Yan ◽  
Shi Guo Du ◽  
Bin Wang ◽  
Hao Qin
Keyword(s):  
Aqueous Solution ◽  
Surface Roughness ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Tetrabutyl Titanate ◽  
Composite Particles ◽  
Absorption Intensity ◽  
Main Material

By using tetrabutyl titanate as the main material, TiO2 nanoparticles / CNTs composite particles have been prepared in acidic abundant aqueous solution at low temperature without calcination. The microstructure of the composite particles, including surface morphology, phase composition and specific surface area was characterized by SEM, TEM, Raman, XPS and BET. The results reveal that TiO2 nanoparticles coated uniformly on CNTs surfaces were mainly anatase type. The surface roughness of CNTs was remarkably increased after coating. However, the specific surface area of composite particles decreased by 23.4 m2•g-1 than that of CNTs with uncoated TiO2. Photocatalytic activity of TiO2 nanoparticles / CNTs composite particles shows a significant increase of absorption intensity both in ultraviolet band and visible light band according to UV-vis spectra.

Preparation and Characterization of Glass Flake/Nano-TiO2 Compound Particle on Low Temperature

2012 ◽  
Vol 490-495 ◽  
pp. 3362-3365
Author(s):  
Yi Guo ◽  
Jun Yan ◽  
Shi Guo Du ◽  
Bin Wang ◽  
Jia Liu
Keyword(s):  
Low Temperature ◽  
Composite Particle ◽  
Film Formation ◽  
Tio2 Particle ◽  
Growth Speed ◽  
Tio2 Particles ◽  
Glass Flake ◽  
Compound Particle ◽  
Main Material

Glass flake has excellent capacity of anti-infiltration, for perfecting the bonding of resin and glass flake, Using butyl titanate as the main material, the glass flake/TiO2 composite particle doped by Sn4+ at low temperature was prepared. SEM observation indicated that TiO2 particles covered the glass flake powder surface and form nanometer/micron structure. XRD showed TiO2 particle was amorphous, the particle size was very small or just formed halfcrystal. Acidity effected the growth speed of crystal and structure of growth elementary. SnCl4 could form heterogeneous crystal to lead the TiO2 film formation.

Synthesis and Characterization of Silica Coated Carbon Nanotubes-Alumina Composite Ceramics

2014 ◽  
Vol 703 ◽  
pp. 106-109
Author(s):  
Sheng Hao Meng ◽  
Jun Yan ◽  
Hong Guang Li ◽  
Shi Guo Du
Keyword(s):  
Carbon Nanotubes ◽  
Alumina Ceramic ◽  
Synthesis And Characterization ◽  
Composite Ceramics ◽  
Alumina Composite ◽  
Coated Carbon ◽  
Scanning Electron ◽  
Main Material

Silica-coated carbon nanotubes compounds were synthesized through coating silica nanoparticles on the surface of carbon nanotubes, by peptization and reflux method with tetraethoxy silicone as a main material. Silica coated carbon nanotubes-alumina composite ceramics were synthesized by adding the SiO2/CNTs compounds to the alumina ceramic. The surface of composite ceramics were observed by scanning electron microscope (SEM), the coated nanotubes exhibit better dispersion in the alumina substrate over uncoated and play a role of bridging the alumina grains.

Fabrication and Characterization of Ceramic Floor Tiles from Coal Gangue

2011 ◽  
Vol 266 ◽  
pp. 63-67 ◽  
Author(s):  
Hong Liang Xu ◽  
De Liang Chen ◽  
Hai Long Wang ◽  
Hong Xia Lu ◽  
Rui Zhang ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Bulk Density ◽  
Linear Shrinkage ◽  
Coal Gangue ◽  
Weight Percentage ◽  
Floor Tiles ◽  
Density Values ◽  
Main Material

Coal gangue was used as the main material to fabricate floor tiles in this paper. The mixture of coal gangue, quartz, feldspar and bentonite, with the weight percentage of 55, 20, 20 and 5, was wetly milled, dried, and then pressed into green compacts. The obtained compacts were sintered at 1180-1240 oC and the floor tiles were obtained. The obtained tiles were characterized by XRD, SEM, linear shrinkage, water absorption, bulk density and flexural strength. The results indicate that the tiles were composed of glassy phases, quartz and mullite phases. The phase composition, microstructure, physico-mechanical properties of the samples change with the sintering temperature. The tile sintered at 1220 oC achieves the linear shrinkage, water absorption and bulk density values of 6.18%, 0.16%, 2.45 g/cm3, respectively. Its flexural strength reaches the maximum of 92.0 MPa.

Preparation and Characterization of TiO2 Film on Glass Flake

2013 ◽  
Vol 537 ◽  
pp. 220-223
Author(s):  
Yi Guo ◽  
Shi Guo Du ◽  
Jun Yan ◽  
Bin Wang
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Energy Spectrum ◽  
Surface Phase ◽  
X Ray ◽  
Physical Deposition ◽  
Glass Flake ◽  
Scanning Electron ◽  
Main Material

A TiO2 film was prepared on glass flake with Ti(OBu)4 as a main material by peptization and reflux method at 80°C in acidic abundant aqueous solution. The surface topography and surface phase structure were characterized by scanning electron microscope, energy spectrum, X-ray diffractometer, X-ray photoelectron spectroscope, and the bonding strength between film and glass flake was researched by ultrasonic vibration. The results indicated that the TiO2 film, the main phase was anatase and a little rutile, coated on the glass flake uniformly. Along with growth of TiO2 on surface of glass flake, the formation maybe base on two different mechanics, at the earlier stage, TiO2 coupled surface of glass flake with Si-O-Ti chemical bond, but with physical deposition at final.

scholarly journals Experimental Characterization Protocols for Wear Products from Disc Brake Materials

Atmosphere ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1102 ◽  
Author(s):  
Ankur Sinha ◽  
Gloria Ischia ◽  
Cinzia Menapace ◽  
Stefano Gialanella
Keyword(s):  
Ultrafine Particles ◽  
Disc Brake ◽  
Brake Pads ◽  
Brake Wear Particles ◽  
General Improvement ◽  
Emission Behavior ◽  
Brake Wear ◽  
Wear Products ◽  
Main Material

The increasing interest in the emission from the disc brake system poses new challenges for the characterization approaches used to investigate the particles emitted from the wearing out of the relevant tribological systems. This interest stems from different factors. In the first place, a thorough characterization of brake wear particles is important for a complete understanding of the active tribological mechanisms, under different testing and servicing conditions. This information is an important prerequisite not only for the general improvement of brake systems, but also to guide the development of new materials for discs and brake pads, responding better to the specific requirements, including not only performance, but also the emission behavior. In this review paper, the main material characterization protocols used for the analyses of the brake wear products, with particular regard for the airborne fraction, are presented. Reliable results require investigating the fine and ultrafine particles as concerns their composition together with their structural and microstructural aspects. For this reason, in general, multi-analytical protocols are very much recommended.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

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