Fabrication of highly porous glass filters using capillary suspension processing

Fabrication of Bentonite–Silica Sand/Suspended Waste Palm Leaf Composite Membrane for Water Purification

“…Figure 11 shows that the flux rate increased with the difference in the pressure between the two sides of the membrane; the flux rate increased from 192.41 to 283.20 L/m 2 ·h upon the pressure difference being increased from 3 to 6 bar. The results could be fitted well with Darcy’s law, according to which water flow through a purification system is proportional to the hydraulic gradient [ 25 ]. The water permeability, plotted as a function of pressure difference shown in Figure 11 , reveals that a high degree of water permeability was achieved at a low operating pressure; these results are similar to those obtained using a commercial seawater reverse osmosis system [ 26 ].…”

Shrinkage and dimensional accuracy of porous ceramics derived from capillary suspensions

“…The secondary liquid forms capillary bridges between the particles and, thus, a sample-spanning network of flocculated particles is formed [18][19][20]. Upon the creation of this particle network, the suspension becomes gel-like and can be molded, debinded and subsequently sintered to produce porous ceramics with open porosities > 50% and pore sizes in the range of 1 μm to 50 μm that exhibit high mechanical stability and high permeability coefficients [17,[21][22][23]. The advantage of capillary suspension processing over other established methods lies in the fabrication of bodies with porosities above 50% combined with pore sizes less than 10 μm, a combination that is arduous with the aforementioned processing routes [1,6,17,21].…”

Positively charged and flexible SiO2@ZrO2nanofibrous membranes and their application in adsorption and separation

“…However, for some small size particles, such as dyes (<100 nm), bacteria (<1 mm) and viruses (<100 nm), adsorption and interception properties have been found to be poor mainly because of the large size of the pores (>2 mm) of porous ceramics. [12][13][14] Electrospinning is a method of preparing nanobers using a high voltage electrostatic eld. 15,16 The spinnable polymer and the ceramic precursor were mixed to prepare a spinning solution, and then porous ceramic brous membranes were obtained aer calcination.…”