Disclosed herein are membrane device embodiments that can be used for separating blood plasma and/or blood serum from blood samples. The membrane device embodiments comprise built-in features that facilitate blood plasma and/or blood serum separation and also provide the ability to detect, quantify, and qualify analytes present in a blood sample. The membrane device embodiments are portable and just a single membrane can be used for a plethora of detection and analysis techniques. Also disclosed herein are embodiments of methods for making and using the membrane device.

The present disclosure provides an ion-exchange membrane that includes a supporting substrate impregnated with an ion-exchange material. The supporting substrate includes an imprinted non-woven layer, and the imprinting includes a plurality of deformations at a surface density of at least 16 per cm.sup.2. The supporting substrate may lack a reinforcing layer. In some examples, the supporting substrate may include only a single layer of the imprinted non-woven fabric.

The present disclosure provides an ion-exchange membrane that includes a supporting substrate impregnated with an ion-exchange material. The supporting substrate includes an imprinted non-woven layer, and the imprinting includes a plurality of deformations at a surface density of at least 16 per cm.sup.2. The supporting substrate may lack a reinforcing layer. In some examples, the supporting substrate may include only a single layer of the imprinted non-woven fabric.

The present invention relates to a method of manufacturing a high-performance thin film composite (TFC) membrane through a solvent activation process. In the present invention, by using a mixed solvent of a good solvent and a poor solvent as an activating solvent, a conventional polysulfone-based support-based TFC membrane having high water permeance as well as excellent salt rejection may be manufactured.

The present invention relates to an asymmetric structure moisturizing mask pack comprising a polylactide. More specifically, the present invention relates to a porous membrane mask pack prepared from copolymers of polylactide and polyvinyl alcohol, wherein the skin contact surface of the mask pack is hydrophilic and the back surface thereof is hydrophobic.

The present invention relates to an asymmetric structure moisturizing mask pack comprising a polylactide. More specifically, the present invention relates to a porous membrane mask pack prepared from copolymers of polylactide and polyvinyl alcohol, wherein the skin contact surface of the mask pack is hydrophilic and the back surface thereof is hydrophobic.

A plasticization-resistant polyurethane membrane for gas separation and producing method are disclosed. The plasticization-resistant polyurethane membrane may include a soft segment, a hard segment and a chain extender. The soft segment may include a polyol compound and the hard segment may include a diisocyanate. The plasticization-resistant polyurethane membrane may be a cross-linked polyurethane membrane.

A plasticization-resistant polyurethane membrane for gas separation and producing method are disclosed. The plasticization-resistant polyurethane membrane may include a soft segment, a hard segment and a chain extender. The soft segment may include a polyol compound and the hard segment may include a diisocyanate. The plasticization-resistant polyurethane membrane may be a cross-linked polyurethane membrane.

The present invention relates to a porous sheet product, to a filter element comprising the porous sheet product, to a method for producing the porous sheet product, to a method for producing the filter element, and to the use of the sheet product and of the filter element.

The present invention relates to a porous sheet product, to a filter element comprising the porous sheet product, to a method for producing the porous sheet product, to a method for producing the filter element, and to the use of the sheet product and of the filter element.