Mechanoluminescence of a composite based on polymethylmethacrylate and fine-disperse powder of phosphor excited by short acoustic pulses and dynamic action of the stylus

2019 ◽  
Vol 33 (30) ◽  
pp. 1950366
Author(s):  
A. F. Banishev ◽  
A. A. Banishev
Keyword(s):  
Surface Layer ◽  
Liquid Phase ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Composite Layer ◽  
Disperse Powder ◽  
Layer Surface ◽  
Dynamic Action ◽  
Optical Transformation ◽  
Fine Disperse

A composite mechanoluminescent layer has been produced on the surface of polymethylmethacrylate by liquid-phase embedding of [Formula: see text] phosphor microparticles into the polymethylmethacrylate surface layer. The photoluminescence and mechanoluminescence of the obtained layer have been investigated. The mechanoluminescence was excited by the short acoustic pulses and by the dynamic pressure of the stylus sliding over the mechanoluminescent layer surface. A possible mechanism of mechanoluminescence excitation is under discussion. The produced composite layer is shown to exhibit high efficiency of “mechano-optical” transformation.

scholarly journals Механолюминесценция тонкого слоя композиционного материала, созданного путем внедрения микрочастиц люминофора SrAl-=SUB=-2-=/SUB=-O-=SUB=-4-=/SUB=- : (Eu-=SUP=-2+-=/SUP=-, Dy-=SUP=-3+-=/SUP=-) в поверхностный слой полиметилметакрилата

2019 ◽  
Vol 45 (10) ◽  
pp. 3
Author(s):  
А.Ф. Банишев ◽  
А.А. Банишев
Keyword(s):  
Laser Radiation ◽  
Liquid Phase ◽  
Methyl Methacrylate ◽  
Power Density ◽  
Photoluminescence Spectrum ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Composite Layer ◽  
Layer Surface ◽  
Kinetics Of

AbstractA mechanoluminescent composite layer at the surface of poly(methyl methacrylate) (PMMA) was obtained by liquid-phase incorporation of SrAl_2O_4 : (Eu^2+, Dy^3+) phosphor microparticles into the polymer. The photoluminescence spectrum and kinetics of emission from the composite layer have been studied as dependent on the power density of exciting laser radiation pulses. The mechanoluminescence of the composite layer has been studied under the effect of short acoustic pulses and dynamic pressure of a solid stylus sliding over the composite layer surface. A possible mechanism of mechanoluminescence excitation is discussed. It is established that the obtained composite layer is characterized by high efficiency of the mechano-optical conversion and can be used for the detection and visualization of mechanical stresses.

Novel Gene-Transferring System Using a Laminin-DNA-Apatite Composite Layer

2007 ◽  
Vol 330-332 ◽  
pp. 1021-1025 ◽  
Author(s):  
Ayako Oyane ◽  
Hideo Tsurushima ◽  
Atsuo Ito
Keyword(s):  
Tissue Engineering ◽  
Gene Therapy ◽  
Surface Layer ◽  
Cell Adhesion ◽  
Contact Area ◽  
High Efficiency ◽  
Composite Layer ◽  
Ethylene Vinyl Alcohol ◽  
Large Contact Area ◽  
Present Gene

A laminin–DNA–apatite composite layer was successfully formed on the surface of an ethylene–vinyl alcohol copolymer. The immobilized DNA was transferred to the cells adhering onto the laminin–DNA–apatite composite layer more efficiently than those adhering onto a lamininfree DNA–apatite composite layer. It is considered that laminin immobilized in the surface layer enhances cell adhesion and spreading, and DNA locally released from the layer is effectively transferred into the adhering cells, taking advantage of the large contact area. The present gene transferring system, which shows high efficiency and safety, would be useful in gene therapy and tissue engineering.

An investigation of the mechanoluminescence of composite materials based on a polymer and a phosphor powder excited by the action of a mechanical striker, stylus and laser pulse

2020 ◽  
Vol 6 ◽  
pp. 62-68
Author(s):  
A.F. Banishev ◽  
◽  
A.A. Banishev ◽  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Polymethyl Methacrylate ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Composite Layer ◽  
Laser Pulses ◽  
Visible Spectral Region ◽  
Mechatronic Systems ◽  
Short Laser Pulses

The mechanoluminescence of the composite materials based on polymethyl-methacrylate and fine-dispersed powders of Sr4Al14O25:(Eu2+,Dy3+) phosphor with a centrosymmetric crystal structure of microcrystals and SrAl2O4:(Eu2+, Dy3+) phosphor with noncentrosymmetric crystalline structure were investigated. To study of mechanoluminescence, the composite layer with a thickness of ~250-300 μm was deposited on the surface of polymethyl-methacrylate substrate transparent in the visible spectral region. The mechanoluminescence of the composite layer was excited by the action of a mechanical striker, short laser pulses in air and water, and dynamic pressure of the stylus sliding over the surface of the mechanoluminescent layer. It is shown that the composite material based on a polymer and SrAl2O4:(Eu2+,Dy3+) powder with a noncentrosymmetric crystal lattice has a pronounced mechanoluminescence, while the composite material with Sr4Al14O25:(Eu2+,Dy3+) powder does not exhibit of the mechanoluminescent properties. It was shown that the excitation of mechanoluminescence in water begins at a much lower power density of the laser pulses than in air. The produced composite layer is shown to exhibit a high efficiency of “mechanooptical” transformation and can be used for recording and visualizing mechanical effects in mechatronic systems.

scholarly journals Rated definition of degree of cutter coating influence upon parameters of surface layer quality of parts worked

2017 ◽  
Vol 2 (7) ◽  
pp. 20-24
Author(s):  
Вячеслав Безъязычный ◽  
Vyacheslav Bezyazychnyy ◽  
Максим Басков ◽  
Maksim Baskov
Keyword(s):  
Surface Roughness ◽  
Surface Layer ◽  
Residual Stresses ◽  
Layer Surface ◽  
Wear Resistant Coatings ◽  
Cutter Wear ◽  
Definition Of ◽  
Surface Layer Quality ◽  
The Impact

The impact of cutter wear-resistant coatings upon cutting process parameters and characteristics of surface layer quality in the parts worked: residual stresses, a degree and a depth of work hardening of a surface layer, surface roughness is investigated.

Mathematical modeling of multicomponent catalytic processes of petroleum refining and petrochemistry

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Emiliya D. Ivanchina ◽  
Elena N. Ivashkina ◽  
Irena O. Dolganova ◽  
Nataliya S. Belinskaya
Keyword(s):  
Liquid Phase ◽  
Kinetic Models ◽  
High Efficiency ◽  
Catalyst Deactivation ◽  
Thermal Conditions ◽  
Industrial Processes ◽  
Catalytic Dewaxing ◽  
Alkylation Of Benzene ◽  
Stationary Conditions ◽  
Methodological Aspects

Abstract This review summarizes Russian developments on the most important industrial processes of hydrocarbon feedstock refining according to the data of the last 15–20 years on the kinetics of deactivation of heterogeneous and liquid-phase catalysts under non-stationary conditions. The methodological aspects of the creation and application of kinetic models for the deactivation of heterogeneous and liquid-phase catalysts under non-stationary conditions are considered. It is shown that high efficiency of catalytic technologies is ensured by regulation of hydrodynamic and thermal conditions of industrial processes of gasoline reforming, alkane dehydrogenation, alkylation of benzene with higher alkenes and catalytic dewaxing using kinetic models, which take into account catalyst deactivation.

Wear Assessment of Ti/SiC Surface Nano-Composite Layer and its Associated CP-Ti Substrate

2012 ◽  
Vol 445 ◽  
pp. 595-600 ◽  
Author(s):  
Ali Shamsipur ◽  
Seyed Farshid Kashani-Bozorg ◽  
Abbas Zarei Hanzaki
Keyword(s):  
Surface Layer ◽  
Wear Behavior ◽  
Composite Layer ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Micro Hardness ◽  
Wear Properties ◽  
Friction Stir ◽  
Pin On Disc ◽  
Cp Ti

In the present investigation, the surface of a commercially pure titanium (CP-Ti) substrate was modified to Ti/SiC nanocomposite layer employing friction stir processing technique; nanosized SiC powder was introduced into the stir zone provided by a rotating and advancing tool. The fabricated nanocomposite surface layer exhibited a micro hardness value of ~535HV which is much greater than 160HV of the substrate material using Vickers micro hardness testing. In addition, the un-treated CP-Ti substrate showed sever wear regime in the pin-on-disc test against the hardened AISI 52100 steel. It suffers extensive typical adhesive wear dominated by plastic deformation as evidenced by scanning electron microscopy. Also, deep grooves were formed, i.e. evidence of abrasive wear. Contrary to this, enhanced wear properties were detected for the Ti/SiC nanocomposite surface layer, i.e. lower coefficient of friction and weight loss. The nanocomposite surface layer was found to be adherent to the underlying substrate during the pin-on-disc test. The superior wear behavior of the nanocomposite surface layer is attributed to its improved micro hardness value due to the presence of hard nanosize SiC particles in a refined titanium matrix.

Au@zirconium-phosphonate nanoparticles as an effective catalytic system for the chemoselective and switchable reduction of nitroarenes

2019 ◽  
Vol 21 (3) ◽  
pp. 614-626 ◽  
Author(s):  
Francesco Ferlin ◽  
Matteo Cappelletti ◽  
Riccardo Vivani ◽  
Monica Pica ◽  
Oriana Piermatti ◽  
...  
Keyword(s):  
Catalytic System ◽  
Zirconium Phosphate ◽  
High Efficiency ◽  
Reducing Agent ◽  
Layer Surface ◽  
Flow Conditions ◽  
Zirconium Phosphonate

Zirconium phosphate bearing aminoethyl groups on the layer surface, ZP(AEP), was used to immobilize AuNPs. The gold-based catalyst proved its high efficiency for the chemoselective reduction of nitroarenes under both batch and flow conditions by using NaBH4 as a reducing agent.

Nanoscale control of the network morphology of high efficiency polymer fullerene solar cells by the use of high material concentration in the liquid phase

2009 ◽  
Vol 21 (3) ◽  
pp. 035201 ◽  
Author(s):  
R Radbeh ◽  
E Parbaile ◽  
J Bouclé ◽  
C Di Bin ◽  
A Moliton ◽  
...  
Keyword(s):  
Solar Cells ◽  
Liquid Phase ◽  
High Efficiency ◽  
Network Morphology
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