Abstract:
A composite membrane comprising: (A) a porous support; (B) optionally a gutter layer; (C) a first discriminating layer; (D) an outermost layer; and (E) a non-discriminating layer interposed between the first discriminating layer (C) and the outermost layer (D); wherein the outermost layer (D) is a discriminating layer comprising a polyimide polymer.
Abstract translation:本发明提供一种中空纤维膜型血液净化装置,其中中空纤维膜填充到容器中,其中中空纤维膜包括疏水性聚合物,亲水性聚合物和脂溶性材料,其量 中空纤维膜内表面的脂溶性物质为10mg / m 2〜300mg / m 2,容器的透氧系数为1.8×10 -10 cm 3·cm /(cm 2·s·cmHg以下)。
Abstract:
Water vapor transport membranes for ERV and other water vapor transport applications are provided. The membranes include a substrate and an air impermeable selective layer coated on the substrate, the selective layer including a cellulose derivative and a sulfonated polyaryletherketone. In some embodiments the sulfonated polyaryletherketone is in a cation form and/or the selective layer includes s PEEK and CA in an s PEEK:CA (wt.:wt.) ratio in the range of about 7:3 to 2:3. Methods for making such membranes are provided. The methods include applying a coating solution/dispersion to a substrate and allowing the coating solution/dispersion to dry to form an air impermeable selective layer on the substrate, the coating solution/dispersion including a cellulose derivative and a sulfonated polyarylether ketone. In some embodiments the sulfonated polyaryletherketone is in a cation form and/or the coating solution/dispersion includes s PEEK and CA in an sPEEK:CA (wt.:wt.) ratio in the range of about 7:3 to 2:3.
Abstract:
The present invention includes a patterned thin film membrane and a patterned thin film composite membrane. The present invention also includes a method of making and using the patterned membranes of the invention. In certain embodiments, the thin film membrane comprises a first surface and a second surface counterfacing the first surface. In other embodiments, a repeating pattern covers a portion of a working area of the thin film membrane. In yet other embodiments, the periodicity of the repeating pattern is equal to or lower than about 1 micrometer in size. In yet other embodiments, the repeating pattern covers a portion of at least one selected from the group consisting of the first surface and the second surface of the thin film membrane.
Abstract:
This invention relates to an asymmetric composite membrane containing a polymeric matrix and carbon nanotubes within a single membrane layer, where the carbon nanotubes are randomly oriented within the polymeric matrix and the composite membrane is formed by phase inversion. This invention also relates to a method for producing the composite membrane which includes: coating a surface with a film of a polymer solution containing a polymeric matrix and carbon nanotubes dissolved in at least one solvent; immersing the coated surface in a non-solvent to affect solvent/non-solvent demixing resulting in phase inversion to form a carbon nanotube-containing membrane; and optionally, removing the carbon nanotube-containing membrane from the surface. The invention also relates to a desalination method using the composite membrane.
Abstract:
Provided is a method of manufacturing a multilayer mixed matrix membrane which includes providing a support layer, casting. a hydrophilic layer on a surface of the support layer, casting a hydrophobic layer on the hydrophilic layer, and allowing the layers to form a multilayer mixed matrix membrane. Also provided is a method of manufacturing a hollow fiber composite matrix membrane, which includes providing a first solution having a hydrophilic polymer, providing a second solution having a hydrophobic polymer, and extruding the first and second solutions to form a multilayer hollow fiber composite matrix membrane. Additionally, a plate~and-frame membrane module for direct contact membrane distillation using a multilayer mixed matrix membrane is provided. The plate-and-frame membrane module includes a feed inlet capable of distributing process solution throughout the membrane module, a permeate inlet capable of distributing process solution throughout the membrane module, a tortuous promoter comprising multiple flow channels, a feed outlet, and a permeate outlet.
Abstract:
A composite membrane comprising: a) a porous support; b) a gutter layer; and c) a discriminating layer; wherein at least 10% of the discriminating layer is intermixed with the gutter layer.