Described are wound-pleated filters and methods of preparing and using these filters.

Described are wound-pleated filters and methods of preparing and using these filters.

Biotin-containing monomers, polymeric materials formed from the biotin-containing monomers, articles containing the polymeric materials, methods of making the articles, and methods of using the articles are provided. The articles can be used, for example, for affinity capture of biotin-binding proteins, including biotin-binding fusion proteins (i.e., a biotin-binding protein fused to another biomaterial). Articles that contain captured biotin-binding proteins can be further used for affinity capture of various biotin-containing biomaterials such as biotinylated proteins. The articles can also be used, for example, for affinity capture of biotin-binding fusion proteins where the fusion protein includes, for example, an enzyme or antibody.

Biotin-containing monomers, polymeric materials formed from the biotin-containing monomers, articles containing the polymeric materials, methods of making the articles, and methods of using the articles are provided. The articles can be used, for example, for affinity capture of biotin-binding proteins, including biotin-binding fusion proteins (i.e., a biotin-binding protein fused to another biomaterial). Articles that contain captured biotin-binding proteins can be further used for affinity capture of various biotin-containing biomaterials such as biotinylated proteins. The articles can also be used, for example, for affinity capture of biotin-binding fusion proteins where the fusion protein includes, for example, an enzyme or antibody.

The present invention relates to a separation membrane including a thermoplastic polymer selected from a cellulose ester and a polyamide, in which, when regions obtained by dividing a cross-sectional surface perpendicular to a longitudinal direction of the separation membrane into 5 at an equal interval are defined as regions 1 to 5, all the regions 1 to 5 have a number average pore diameter changing rate a of −0.25 to 0.25, and at least one of the regions 1 to 5 is a region P that satisfies conditions (a) and (b): (a) a value of area average pore diameter D.sub.s/number average pore diameter D.sub.n is 2.50 to 6.00; and (b) a number average W of fine pores that are located at a distance smaller than L.sub.a from a center of respective coarse pores is 10 to 30.

The present invention relates to a separation membrane including a thermoplastic polymer selected from a cellulose ester and a polyamide, in which, when regions obtained by dividing a cross-sectional surface perpendicular to a longitudinal direction of the separation membrane into 5 at an equal interval are defined as regions 1 to 5, all the regions 1 to 5 have a number average pore diameter changing rate a of −0.25 to 0.25, and at least one of the regions 1 to 5 is a region P that satisfies conditions (a) and (b): (a) a value of area average pore diameter D.sub.s/number average pore diameter D.sub.n is 2.50 to 6.00; and (b) a number average W of fine pores that are located at a distance smaller than L.sub.a from a center of respective coarse pores is 10 to 30.

The present invention relates to polymer compositions (C) for the preparation of porous article, notably microporous membranes or hollow fibers. More particularly, the present invention relates to a process of preparing a porous article from at least one polyphenylene sulfide (PPS) polymer with an additive and at least one reinforcing filler followed by a step of shaping the article and contacting the article with water to dissolve the additive and create an interconnected pore network within the shaped article.

The present invention relates to polymer compositions (C) for the preparation of porous article, notably microporous membranes or hollow fibers. More particularly, the present invention relates to a process of preparing a porous article from at least one polyphenylene sulfide (PPS) polymer with an additive and at least one reinforcing filler followed by a step of shaping the article and contacting the article with water to dissolve the additive and create an interconnected pore network within the shaped article.

A method for preparation of conductive polymer/carbon nanotube (CNT) composite nanofiltration (NF) membrane and the use thereof. This conductive polymer/CNT composite NF membrane is obtained by polymerizing conductive polymer into a CNT membrane and then in-situ cross-linking with glutaraldehyde under acidic condition. The synthetic method for the conductive polymer/CNT composite NF membrane is simple and has no need of expensive equipment. The prepared membrane has controllable membrane structure and possesses superior electrical conductivity and electrochemical stability. The membrane can couple with electrochemistry for electrically assisted filtration. With the electrical assistance, the membrane can achieve improved ion rejection performance while retaining high permeability by enhancement of membrane surface charge density, which alleviates the permeability-selectivity trade-off. Furthermore, the electrically assisted NF membrane filtration can also enhance the removal for small molecular organic pollutants.

A method for removing ethylene from the atmosphere surrounding an agricultural product that is sensitive to ethylene, which promotes climacteric ripening and senescence, is disclosed. The method uses a membrane for selective ethylene permeation and removal from a container that is used to store, transport, and preserve the agricultural product.