Overcoming the Trade-off between Water Permeation and Mechanical Strength of Ceramic Membrane Supports by Interfacial Engineering

2021 ◽  
Author(s):  
Qilin Gu ◽  
Masashi Kotobuki ◽  
Chin Ho Kirk ◽  
Meibo He ◽  
Gwendolyn J. H. Lim ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Ceramic Membrane ◽  
Trade Off ◽  
Water Permeation ◽  
Interfacial Engineering

scholarly journals High efficiency dye-sensitized solar cells with VOC–JSC trade off eradication by interfacial engineering of the photoanode|electrolyte interface

RSC Advances ◽  
2019 ◽  
Vol 9 (69) ◽  
pp. 40292-40300
Author(s):  
Anantharaj Gopalraman ◽  
Subbian Karuppuchamy ◽  
Saranyan Vijayaraghavan
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Surface States ◽  
Trade Off ◽  
Interfacial Engineering ◽  
Dye Sensitized ◽  
Electrolyte Interface ◽  
Sensitized Solar Cells

VOC–JSC trade off is eliminated. Newly created surface states by OA in TiO2 facilitated the charge transfer kinetics.

scholarly journals Trade-off between root porosity and mechanical strength in species with different types of aerenchyma

2007 ◽  
Vol 30 (5) ◽  
pp. 580-589 ◽  
Author(s):  
G. G. STRIKER ◽  
P. INSAUSTI ◽  
A. A. GRIMOLDI ◽  
A. S. VEGA
Keyword(s):  
Mechanical Strength ◽  
Root Porosity ◽  
Trade Off ◽  
Different Types

scholarly journals Effect of sintering temperature of bauxite hollow fiber membrane on flexural strength and water permeability

2019 ◽  
Vol 15 (2) ◽  
pp. 190-193
Author(s):  
Mohamad Izrin Mohamad Esham ◽  
Mohd Hafiz Dzarfan Othman ◽  
Ahmad Fauzi Ismail ◽  
Mukhlis A Rahman ◽  
Juhana Jaafar ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Ceramic Membrane ◽  
Sintering Temperature ◽  
Hollow Fiber Membrane ◽  
Oil Field ◽  
Efficient Production ◽  
Oily Wastewater ◽  
Fiber Membrane ◽  
Membrane Pore ◽  
Water Permeation

With abundant Malaysian bauxite minerals as the selected materials, hollow fiber ceramic membrane was fabricated for efficient production of high quality water from oil field oily wastewater. Effect of sintering temperature between 1250°C and 1450°C on membrane porosity, size of membrane pore, hydrophilicity, mechanical strength and water permeation were examined and the results were analyzed to determine the most suitable hollow fiber membrane for the application. Based on obtained findings, the most suitable sintering temperature was 1350°C. The acceptable strength and morphological behavior of finger-like and sponge-like voids were found to be advantageous characteristics for the fabricated bauxite hollow fiber membrane. Its pleasant structure with good outer and inner layers of separation might be beneficial for the oily wastewater purification applications.

scholarly journals Study of the influence of the aluminum source (acetate or sulfate) on the synthesis of the ceramic membrane and applications of emulsion oil water: use and reuse

2021 ◽  
Vol 10 (13) ◽  
pp. e75101321023
Author(s):  
Antonielly dos Santos Barbosa ◽  
Antusia dos Santos Barbosa ◽  
Meiry Gláucia Freire Rodrigues
Keyword(s):  
Mechanical Strength ◽  
Aluminum Sulfate ◽  
Ceramic Membrane ◽  
Ceramic Membranes ◽  
Raw Material ◽  
Water Separation ◽  
Oil Water ◽  
Oily Waste ◽  
Emulsion Oil ◽  
Aluminum Acetate

The objective of this work was to prepare ceramic membranes and to evaluate the effect of the raw material on the ceramic membrane and on the efficiency of the emulsion separation oil/water. The ceramic membranes were manufactured using the uniaxial dry compaction method, from the thermal decomposition of aluminum sulfate or aluminum acetate, to evaluate the effect of the raw material (aluminum acetate or aluminum sulfate) on the efficiency in the emulsion oil/water separation. Ceramic membranes were characterized by measurements of X-ray diffraction patterns, scanning electron microscopy, mechanical strength, bubble point and water flow. In this study, membranes were produced with different characteristics. The values found for the permeate for the A1 membrane were 9.20 mg / L due to characteristics such as porosity and mechanical strength (44.63 % and 1.3 MPa), while the values A2 membrane was 6.52 mg / L, 18.86 % and 6.7 MPa. In conclusion, the membranes prepared are effective in removing the oil from the oily waste water. According to the results, the treatment of oil-water emulsions by microfiltration facilitates a significant reduction in the concentration of permeate oil.

scholarly journals A Trade-Off between Mechanical Strength and Erosive Wear Resistance in AlSi12CuMgNi Alloy Used to Manufacture Fan Blades for Underground Mines

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 313 ◽  
Author(s):  
Florentino Alvarez-Antolin ◽  
Elvira Segurado-Frutos ◽  
Alejandro González-Pociño ◽  
Alberto Cofiño-Villar ◽  
Juan Asensio-Lozano
Keyword(s):  
Wear Resistance ◽  
Mechanical Strength ◽  
Underground Mining ◽  
Erosive Wear ◽  
Underground Mines ◽  
X Ray Diffraction ◽  
Cast State ◽  
Axial Fan ◽  
High Mechanical Strength ◽  
Trade Off

The axial fan blades used in underground mines are usually manufactured in AlSi12CuMgNi alloy (EN AC 48000). They must have a high mechanical strength to withstand the stresses resulting from the rotation speed of the rotor and a high resistance to erosive wear caused by suspended particles from underground mining and transport operations. The aim of this paper is to determine the most suitable thermal treatment to simultaneously improve their mechanical strength and erosive wear resistance. To this end, two solution treatments at 525 °C with cooling in water were analysed, as well as several ageing times at 170 °C. The crystalline phases present in the as-cast state were quantified by X-ray diffraction following quenching and different ageing processes. Furthermore, erosion wear resistance was measured by means of compressed air blasting with corundum particles according to ASTM G76 (2004). The highest wear resistance was obtained in the as-cast state using gravity die casting, with the presence of Al4Cu2Mg8Si7 and Al3CuNi. This wear resistance was higher than that obtained after the ageing treatment. However, a trade-off between mechanical strength and wear resistance was observed after 12 h ageing, where the hardness obtained exceeded 160 HV and the wear resistance became similar to that obtained in the as-cast state.

scholarly journals Effect of Sintering Temperature on the Fabrication of Ceramic Hollow Fibre Membrane

2016 ◽  
Vol 15 (2) ◽  
pp. 1
Author(s):  
Syafikah H Paiman ◽  
Mukhlis A A Rahman ◽  
Mohd Hafiz Dzarfan Othman ◽  
Siti Halimah Ahmad
Keyword(s):  
Mechanical Strength ◽  
Ceramic Membrane ◽  
Sintering Temperature ◽  
Pure Water ◽  
Water Flux ◽  
Hollow Fibre ◽  
Polymeric Membrane ◽  
Asymmetric Structure ◽  
Hollow Fibre Membrane ◽  
Fibre Membrane

Recently, ceramic membrane gradually acquired attention from researchers due to the advantages of ceramic’s behavior, which allows the ceramic to overcome the limitations of using polymeric membrane. This work focused on the fabrication of ceramic hollow fibre membrane from a ceramic suspension solution containing yttria-stabilized zirconia (YSZ), polyethersulfone (PESf), N-methylpyrrolidone (NMP) and dispersants using combined phase inversion sintering technique. In this study, ceramic hollow membrane precursors were sintered at different sintering temperature ranging between 1250°C and 1400°C. The influences of sintering temperature on the microstructure, porosity and pore size distribution, mechanical strength and pure water flux of ceramic hollow fibre membrane were investigated in detail. The results show an asymmetric structure of YSZ hollow fibre membrane containing finger-like structure and sponge-like structure. The sponge-like structure can serve as a separation layer, while finger-like-structure performs as a supported layer. It is observed that sintering process caused a significant densification of sponge-like structure (microstructure). Sintering at temperature 1400°C shows the formation of non- interconnected voids. Sintering at 1300°C is sufficient enough having a mechanical strength of 227.55MPa with an apparent porosity of 45.09% and PWF of 118.39L.m¯².hr¯¹.

scholarly journals Characteristic properties of ceramic membrane derived from fly ash with different loadings and sintering temperature

2019 ◽  
Vol 15 (3) ◽  
pp. 414-420
Author(s):  
Siti Nur Afiqah Zulkifli ◽  
Azeman Mustafa ◽  
Mohd Hafiz Dzarfan Othman ◽  
Siti Khadijah Hubadillah
Keyword(s):  
Fly Ash ◽  
Mechanical Strength ◽  
Phase Inversion ◽  
Ceramic Membrane ◽  
Sintering Temperature ◽  
Pure Water ◽  
Bending Test ◽  
Sintering Process ◽  
Cross Sectional ◽  
Water Separation

Nowadays, ceramic membrane developed from wastes has gained attention, especially towards water separation applications. With abundant and high silica content of fly ash, low cost ceramic membrane was successfully prepared via phase inversion and sintering technique. Prior to both phase inversion and sintering process, ceramic suspension was prepared at different loadings, ranging from 40wt% to 50 wt% fly ash and subsequently sintered at temperature ranging from 1150°C to 1350°C. By varying fly ash content and sintering temperature, the morphology, mechanical strength and phase transformation characteristics of the prepared membrane were affected. The characterisation of prepared membrane were investigated by using scanning electron microscopy, three-point bending test, and X-ray diffraction (XRD). The mechanical strength of the membrane increased with increasing fly ash loading (up to 45 %), however too much fly ash loading resulted in decrease of its mechanical strength probably due the presence of unburnt at higher fly ash contents. This unburnt carbon contributed to the vacant space during sintering process and had the tendency to increase formation of pores, simultaneously reduced its mechanical strength. In addition, the SEM results also illustrated a cross-sectional image of the membrane which had become more elastic with increasing fly ash loading and denser as sintering temperature gradually increased. In addition, increasing the fly ash loading likely discouraged the formation of desired finger-like structure. The XRD results however showed continuous presence of mullite with the increasing sintering temperature which contributed higher mechanical strength. The preliminary performance tests indicated that the optimum conditions to produce hollow fibre ceramic membrane from fly ash were at 45 wt % fly ash loading sintered at 1350°C and has a pure water flux of 131 L/m2h.

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