Abstract:
A separation device for use in separating a liquid-liquid mixture, and methods for preparing a separation device and using said separation device for separating a liquid-liquid mixture are disclosed. The separation device comprises a porous substrate and a coating formed on at least one surface of the porous substrate, wherein the coating comprises a plurality of polyelectrolyte layers of opposite charge formed on the at least one surface of the porous substrate in an alternating layer by layer electrostatic arrangement, and a plurality of nano-fibrillated species collectively formed as a capping layer electrostatically coupled to an outermost polyelectrolyte layer of said plurality of alternating polyelectrolyte layers.
Abstract:
In present invention, a glass material which is superhydrophilic at least in air and superoleophobic when submerged in water is provided. Additionally, a process for making the glass material from waste glass through a green and sustainable route is provided. The process comprises crushing the waste glass to form powder through ball milling, dispersing the crushed waste glass in a solvent to form a dispersion, coating said dispersion onto a substrate, drying the coated substrate and subjecting the dried substrate to a hydrothermal treatment for less than 24 hours in the presence of an aqueous medium (e.g. deionized water). The resultant glass comprises a porous layer comprising interconnected silica-based fibers and exhibit excellent performance in the selective separation of a wide range of oil/water mixtures, even under various harsh conditions. Furthermore, the glass material can remove water-soluble contaminants simultaneously during the oil/water separation process, leading to multifunctional water purification.
Abstract:
Use of flat sheet filter media for whole blood filtration, wherein the blood plasma/serum is separated from the blood cells. The filtration processes may obtain cell-free or practically cell free plasma without the occurrence of hemolysis, wherein the concentration of diagnostic plasma analytes is maintained.
Abstract:
The present invention provides a method for applying a surface coating on, for example, a sheet of fabric and further provides a plasma chamber (10) for coating a sheet of fabric, e.g. a textile material, with a polymer layer, the plasma chamber (10) comprising a plurality of electrode layers (RF, M) arranged successively within the plasma chamber, wherein at least two adjacent electrode layers are radiofrequency electrode layers (RF) or ground electrode layers (M), thereby providing a surface coating on both sides of a fabric sheet.
Abstract:
A filter medium containing a nonwoven nanoweb made of aromatic polymer fibers, wherein the nanoweb has a porosity of 85% or greater, a basis weight of 5 grams per square meter or greater, a mean pore size of 0.1 to 10 µm and a uniformity index of between 1.5 and 2.5.
Abstract:
A filter for removing substances, including leukocytes and platelets by way of non-limiting example, from whole blood or from blood derivatives, said filter comprising a casing containing a layered filter element, at least one layer of this latter being coated with polyurethane; this polyurethane has a molecular weight between 10,000 and 20,000 Dalton. A method for forming the layered filter element for a filter such as the aforedescribed is also claimed, in which at least one layer of this filter element is impregnated with polyurethane by immersing it in a container of a mixture in which said polyurethane is present. This mixture consists of a solution in which the polyurethane is dissolved in a polar solvent such as water.
Abstract:
A process for the preparation of coated porous material, the process including the steps of: a) providing a porous substrate with a plurality of pores extending through the substrate from a first major surface to a second major surface, each pore having an inner pore wall defining the internal dimension of the pore; b) applying a coatable composition to at least a portion of the inner pore walls of the porous substrate, the coatable composition made with at least one polymerizable compound, a second compatible component and solvent; c) removing the solvent from the coatable composition; d) saturating the porous substrate and the coatable composition with a rewetting solution; and e) polymerizing the polymerizable compound to form a hydrophilic coating on the pore walls and to provide the coated porous material, the hydrophilic coating. In other aspects, coated porous material made from the foregoing process is also provided.
Abstract:
A membrane is provided including a coating layer having cellulose nanofibers produced from oxidized cellulose microfibers and an electrospun substrate upon which the coating layer is applied. The nanofibers of the electrospun substrate have a diameter greater than that of the cellulose nanofibers. The membrane also has non-woven support upon which the electrospun substrate is disposed. Microfibers of the non-woven support have a diameter greater than that of the nanofibers of the electrospun substrate. Application of electrospun membrane is in microfiltration area, while the cellulose nanofiber membrane serves in ultrafiltration, nanofiltration, and reverse osmosis after chemical modification.