scholarly journals Environmental dust removal from inclined hydrophobic glass surface: avalanche influence on dynamics of dust particles

RSC Advances ◽  
2018 ◽  
Vol 8 (59) ◽  
pp. 33775-33785 ◽  
Author(s):  
Bekir Sami Yilbas ◽  
Abdullah Al-Sharafi ◽  
Haider Ali ◽  
Nasser Al-Aqeeli ◽  
Hussain Al-Qahtani ◽  
...  
Keyword(s):  
Glass Surface ◽  
Dust Removal ◽  
Dust Particles ◽  
Transparent Glass ◽  
Optically Transparent ◽  
Glass Surfaces

The removal of environmental dust particles from optically transparent glass surfaces is considered, and the dynamics of the dust particles on the inclined hydrophobic glass surface is examined.

scholarly journals Avalanche effect for chemically modified dust mitigation from surfaces

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Johnny Ebaika Adukwu ◽  
Bekir Sami Yilbas ◽  
Almaz Jalilov ◽  
Hussain Al-Qahtani ◽  
Ahmet Z. Sahin ◽  
...  
Keyword(s):  
Glass Surface ◽  
High Speed ◽  
Solution Treatment ◽  
Cost Effective ◽  
Optical Transmittance ◽  
Vital Role ◽  
Dust Particles ◽  
Avalanche Effect ◽  
Fluorine Compounds ◽  
Glass Surfaces

AbstractCost effective dust mitigation from surfaces is one of the challenges in various sectors. The reduction of dust adhesion on surfaces plays a vital role for dust mitigation from surfaces under the gravitational influence. Creating an avalanche effect on dusty surfaces improves the dust mitigation rate and provides an effective cleaning process. Hence, solution treatment of dust by low concentration hydrofluoric acid is considered towards reducing dust adhesion on glass surfaces. To increase the rate of dust mitigation, the avalanche influence is created by the higher density and larger size particles (5300 kg/m3 and ~ 50 µm) than the average size dust particles (2800 kg/m3 and 1.2 µm) via locating them in the top region of the dusty glass surfaces. Mitigation velocity of the dust particles is evaluated using a high-speed recording system and the tracker program. Findings revealed that solution treatment (curing) of the dust particles results in the formation of fluorine compounds, such as CaF2 and MgF2, on dust surfaces, which suppress dust adhesion on surfaces. OSHA Globally Harmonized System lists the fluorine compounds formed as environmentally non-harmful. Avalanche's influence results in dust mitigation at a smaller tilt angle of the glass surface (~ 52°) than that of the case with none-avalanche influence (63°). Area cleaned on the glass surface, via dust mitigation, is larger as the avalanche is introduced, which becomes more apparent for the solution treated dust particles. Dust mitigation under avalanche influence improves optical transmittance of the dusty glass samples by a factor of 98%.

scholarly journals Additive Manufacturing of Optically Transparent Glass

2015 ◽  
Vol 2 (3) ◽  
pp. 92-105 ◽  
Author(s):  
John Klein ◽  
Michael Stern ◽  
Giorgia Franchin ◽  
Markus Kayser ◽  
Chikara Inamura ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Transparent Glass ◽  
Optically Transparent

Effects of BST on Optical and Dielectric Properties of Na2O-B2O3-SiO2 Glasses

2016 ◽  
Vol 675-676 ◽  
pp. 335-338
Author(s):  
Pratthana Intawin ◽  
Pichitchai Butnoi ◽  
Wilaiwan Leenakul ◽  
Anocha Munpakdee ◽  
Tawee Tunkasiri ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Transparent Glass ◽  
Optically Transparent ◽  
Constant E ◽  
Enhanced Conductivity ◽  
Quench Method

In this research, the effects of Ba0.7Sr0.3TiO3 (BST) on optical and dielectric properties of Na2O-B2O3-SiO2 glasses were investigated. From the study, the optically transparent glass from BST system was successfully prepared by using melt-quench method. The composition of BST used in this study are ranging between 20-60 wt.% BST. It was found that the addition of BST enhanced conductivity, but in turn reduced the percentage of transmittance in the glasses. The dielectric constant (ɛr) of the BST/Na2O-B2O3-SiO2 glasses improved with increasing the content of BST, which in turn plays an important role in controlling the properties of the BST/Na2O-B2O3-SiO2 glasses.

Electrokinetics, Adsorption and Colloid Study of Simulated Nuclear Waste Glasses Leached in Aqueous Solutions

1984 ◽  
Vol 44 ◽  
Author(s):  
Cheng T. Lee ◽  
D. E. Clark
Keyword(s):  
Surface Layer ◽  
Nuclear Waste ◽  
Glass Surface ◽  
Charged Particles ◽  
Electrostatic Repulsion ◽  
Surface Layers ◽  
Short Term ◽  
Chloride Solutions ◽  
Zeta Potentials ◽  
Glass Surfaces

AbstractZeta potentials of SRL-131-29.8% TOS simulated nuclear waste glasses leached in D.I. water, Al, Ca, Mg, and Zn chloride solutions at 90°C were measured as a function of leaching time. For short term leaching, the adsorption of Ca, Mg, Zn and Al reverses the glass surface potential from negative to positive. Colloids were found to be stable in D.I. water and AICl3 solutions after leaching, presumably due to the electrostatic repulsion between the glass surface and similarly charged particles. Colloids were not found in Mg, Zn or Ca chloride solutions after leaching; instead, a relatively thick metasilicate surface layer was formed on glass surfaces leached in these solutions. The concentration of Si in solution is reduced by the formation of these surface layers.

CONCLUSION While cleaned silica-based glass surfaces have similar surface compositions, their susceptibility to strongly adsorbing organic contaminant s depends strongly on the glass composition and the cleaning procedure. For the three glass species exam-ined: silica, aluminoborosilicate, and sodalime glass , the glass surfaces behave similarly after chromic acid cleaning. They show significant differences in their properties followin g a dry cleaning procedure, such as pyrolysis or UV/ozone cleaning. The cleaned silica surfaces show a high susceptibility to adsorbing or-ganic contamination following pyrolysis cleaning, while the pyrolyzed sodalime glass appears to be virtually immune to strongly adsorbing organic molecules. Py-rolyzed aluminoborosilicate glass shows an intermediate susceptibility to adsorb-ing organic contaminants. The chromic acid cleaned glass surfaces all show an in-termediate susceptibility to contamination by adsorbed organic molecules. Thus, it may be an oversimplification to consider a clean glass surface as a high energy substrate that is bound to attract ambient organic contamination. The wettability behavior of the cleaned glass surfaces showed features associ-ated with their exposed chemical functions. The non-dispersive interaction energy between glass and water as a function of pH showed evidence of charging of the surface silanol groups. The point of zero charge for these surface chemical func-tions was observed at pH 3. An estimate of the non-dispersive interaction energy between glass and water at the point of zero charge enables a reasonable estima-tion of the density of surface silanol groups on the cleaned glass. The trends ob-served for the surface charge as a function of pH correlate with the observed sus-ceptibility for adsorbing organic contamination to the cleaned glass surfaces. Charge-adsorbed surfactant monolayers indicated a negative surface charge on the cleaned glass, as expected for silica-based glass surfaces at neutral pH. The wettability of grafted self-assembled octadecylsilane monolayers indicated high quality coatings on the cleaned glass surfaces. The coating quality was identical for all three glass species following chromic acid cleaning. The UV/ozone cleaned glass surfaces showed the highest coating quality on the silica surface, followed by the aluminoborosilicate surface and the sodalime glass surface. The trends in coating quality for all chromic acid cleaned surfaces and UV/ozone cleaned surfaces correlate with those seen for susceptibility to organic contamina-tion of the cleaned glass surfaces exposed to unpurified liquid octane. REFERENCES

2003 ◽  
pp. 114-116
Keyword(s):  
Glass Surface ◽  
Chromic Acid ◽  
Point Of Zero Charge ◽  
Coating Quality ◽  
Organic Contamination ◽  
Cleaning Procedure ◽  
Silanol Groups ◽  
Acid Cleaning ◽  
Glass Surfaces ◽  
Uv Ozone

Effect of microtubule-destroying drugs on the spreading and shape of cultured epithelial cells

1985 ◽  
Vol 74 (1) ◽  
pp. 267-282
Author(s):  
L.V. Domnina ◽  
J.A. Rovensky ◽  
J.M. Vasiliev ◽  
I.M. Gelfand
Keyword(s):  
Glass Surface ◽  
Cell Shape ◽  
Medium Effects ◽  
Adhesive Surface ◽  
Lipid Films ◽  
Cultured Epithelial Cells ◽  
The Media ◽  
Glass Surfaces ◽  
Cytoplasmic Processes

The role of microtubules in the spreading of cells from the liver-derived IAR2 rat cell line was studied. Cells in the control medium seeded on a flat isotropic glass surface rapidly spread to form discoid shapes. Spreading in colcemid-containing medium was disorganized and delayed; partial reversal of spreading was observed. Nevertheless, even in the presence of colcemid the cells finally spread to discoid flattened shapes. IAR2 cells in medium without colcemid spread not to discoid but to elongated shapes under three different sets of conditions: (1) when the cells were forced to spread on narrow strips of adhesive glass surface between two non-adhesive lipid films; (2) when the cells spread on the poorly adhesive surface of poly(HEMA)-covered glass; (3) when the cells spread on the usual glass surfaces in medium containing cytochalasin D. Addition of colcemid to the media reversed the polarized spreading under the first two conditions; colcemid did not reverse the formation of the elongated cell shape acquired by the cells spreading in cytochalasin-containing medium. Effects of microtubule-destroying drugs on the spreading of epithelial and fibroblast cells are compared and discussed. It is suggested that microtubules are essential for the stabilization of the spread state of those attached cytoplasmic processes and lamellae that do not have numerous and stable-cell substratum contacts, e.g. the processes formed at the early stages of spreading or the elongated processes of polarized cells. Possibly, microtubules stabilize the non-contracted state of the actin cytoskeleton in these processes.

Glass surface evolution following gas adsorption and particle deposition from indoor cooking events as probed by microspectroscopic analysis

2020 ◽  
Vol 22 (8) ◽  
pp. 1698-1709 ◽  
Author(s):  
Victor W. Or ◽  
Michael Wade ◽  
Sameer Patel ◽  
Michael R. Alves ◽  
Deborah Kim ◽  
...  
Keyword(s):  
Glass Surface ◽  
Particle Deposition ◽  
Gas Adsorption ◽  
Emission Sources ◽  
Surface Evolution ◽  
Glass Surfaces

Microspectroscopic analyses of glass surfaces following a single day of cooking events reveal organic depositions that can be traced back to emission sources and airborne distributions.

A NEW METHOD FOR THE APPLICATION OF LUMINESCENT SCREENS TO GLASS SURFACES

1935 ◽  
Vol 13a (6) ◽  
pp. 126-132 ◽  
Author(s):  
W. H. Kohl
Keyword(s):  
Heat Treatment ◽  
Chemical Reaction ◽  
Glass Surface ◽  
Physical Characteristics ◽  
New Method ◽  
Sintering Process ◽  
Luminescent Screen ◽  
Uniform Layer ◽  
Glass Surfaces

An outline is given of the various methods for the application of luminescent screens, and their relative merits. Most widespread in use are methods that utilize a liquid binder that enters into a chemical reaction with the glass surface. In other cases, the powder is partially imbedded in the glass surface by a sintering process. The physical characteristics of the luminescent screen are adversely affected by both of these methods. A process based on the activation of the glass surface by a deposit of sulphur is described. The sulphur coating picks up the luminescent powder in a uniform layer when it is brought into contact with the powder. After being removed by means of a moderate heat treatment, it leaves the screen firmly adhering to the glass surface. Possible mechanisms for the process are briefly discussed.

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