Some embodiments of the present disclosure relate to a composite membrane. In some embodiments, the composite membrane comprises a first fluoropolymer membrane and a second fluoropolymer membrane. In some embodiments a difference between a second surface energy of the second fluoropolymer membrane and a first surface energy of the first fluoropolymer membrane is at least 10 mN/m at 20° C. In some embodiments, the composite membrane has a Z strength of at least 5 psi.

A fiber de-gassing membrane includes a plurality of membrane fibers. At least one of the membrane fibers has a first stiffness. The membrane includes reinforcing fibers. The reinforcing fibers are positioned adjacent to at least one of the membrane fibers. The reinforcing fibers have a second stiffness. The second stiffness is greater than the first stiffness.

The present invention relates to a polyamide reverse osmosis membrane including a porous support; a polyamide layer which is formed on at least one surface of the porous support; a fouling resistant layer which is formed on the polyamide layer; and a protective coating layer which is formed on the fouling resistant layer and linked by cross-linking with the fouling resistant layer, and more specifically to a polyamide reverse osmosis membrane having excellent durability and antifouling properties in which antifouling properties are improved, but there is no decrease in flow rate and salt removal rate, and there is little decrease in physical properties due to fouling and little change over time due to a preservation solution, and chlorine durability is also excellent.

The disclosure provides porous membranes capable of removing very small particulates from a liquid composition. In certain embodiments, the porous membranes comprise poly(tetrafluoroethylene), wherein the membrane is at least partially coated with a polymer prepared from the free radical reaction of ethylenically-unsaturated monomers, wherein the monomers are comprised of monomers having an amide moiety. In particular embodiments, the membranes are capable of removing, by filtration, microbial particles such as bacteria, thus rendering the resulting liquid composition essentially sterile.

The present application discloses a composite reverse osmosis membrane and a preparation method thereof. The method includes: uniformly mixing fluorine-containing polyaryletherketone of a certain concentration and silane-modified polyaryletherketone as a casting solution; coating a non-woven fabric, i.e., a substrate, with the casting solution to form a support layer; then coating the surface of the support layer with a solution A and a solution B sequentially for reaction to form a polyamide desalination layer; and coating the polyamide desalination layer with a modified polyvinyl alcohol anti-pollution layer. By means of the method, the composite reverse osmosis membrane is prepared. Compared with the prior art, the present application can prepare a composite reverse osmosis membrane with high temperature resistance and high strength by using the composite modified polyaryletherketone as the support layer, and moreover, uses polyvinyl alcohol as a component of the anti-pollution layer, and has good anti-pollution properties.

The present invention relates to the field of composite membrane and discloses a polyurethane/polyvinylidene fluoride composite membrane for extracting organic sulfide from naphtha. The polyurethane/polyvinylidene fluoride composite membrane includes an active layer and a support layer where the active layer is a polyurethane casting membrane and the support layer is a polyvinylidene fluoride membrane. The polyurethane/polyvinylidene fluoride composite membrane is prepared by coating the active layer onto the support layer. At the same time, a preparation method for the polyurethane/polyvinylidene fluoride composite membrane is disclosed. The present invention has the following beneficial effects: the polyurethane/polyvinylidene fluoride composite membrane prepared in the present invention may be used to extract organic sulfide in naphtha with high separation efficiency. Further, the composite membrane almost does not change the octane number and the like of the raw material oil, thereby improving the extraction rate of the organic sulfide.

The present invention provides a method for preparing a porous membrane of a fluorine-based resin having an improved shrinkage while maintaining excellent filtration efficiency and air permeability.

A composite membrane is disclosed that comprises a porous polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or nitrocellulose membrane body. The membrane also comprises graphene oxide disposed on a surface of the membrane body. An array comprising two or more such composite membranes is also disclosed. A method of preparing the composite membrane is also disclosed. Further, a method of removing natural organic matter (NOM) from NOM-contaminated water, or water suspected of being contaminated with NOM, is disclosed.

Provided herein is a method of forming a bicontinuous intraphase jammed emulsion gel.

The Invention relates to a method for preparing a multichannel hollow fiber membrane. According to a certain ratio, ceramic powder, a macromolecular polymer, an organic solvent, and a dispersant are mixed evenly to prepare a membrane casting solution; and after bubble removing processing is performed on the membrane casting solution, a membrane green body is formed with the cooperation of a multichannel hollow fiber die and phase inversion. After the membrane green body is roasted at a high temperature, a multichannel ceramic hollow fiber membrane is formed. The multichannel ceramic hollow fiber membrane has an asymmetric structure and a skeleton structure in an inner cavity and can meet the strength and flux requirements of a ceramic hollow fiber membrane.