Compositions made of laminate comprised of porous carbon nanotube (CNT) are disclosed. Uses of the Compositions, particularly for reducing a formation of a load of a microorganism or of a biofilm, are also disclosed.

The Invention discloses a preparation method for a triptyl polymer separation membrane, wherein, it comprises the following steps: take triptycene compound containing active group, dichloride compound and diamino compound containing ether bond as monomers, and conduct polymerization in aprotic organic solvent in the presence of acid-binding agent; pour the obtained polymer solution into deionized water for precipitation after the reaction, filter out precipitates and wash with methanol and dry to get triptyl polymer; dissolve the triptyl polymer in aprotic organic solvent to produce a membrane-casting solution, apply the solution on support and dry to get a triptyl polymer separation membrane. The Invention solves the problem that the reticular polymer material is insoluble, and breaks the restriction for application of such material in separation membrane due to its insoluble and aging features.

The present invention provides a polymer functional film obtained by polymerizing and curing a composition including (A) a styrene-based monomer represented by Formula (HSM); (B) a crosslinking agent represented by Formula (CL); and (C) a polymerization initiator represented by Formula (PI-1) or (PI-2), and a method for producing the same: ##STR00001## in which R.sup.1 represents a halogen atom or N.sup.+(R.sup.2)(R.sup.3)(R.sup.4)(X.sub.1.sup.?); n1 represents an integer from 1 to 10; here, R.sup.2 to R.sup.4 each independently represent a particular substituent; X.sub.1.sup.? represents an organic or inorganic anion; L.sup.1 represents an alkylene group or an alkenylene group; Ra, Rb, Rc and Rd each independently represent a particular substituent; n2 and n4 each independently represent an integer from 1 to 10; X.sub.2.sup.? and X.sub.3.sup.? each independently represent an organic or inorganic anion; and R.sup.5 to R.sup.10 each represent a hydrogen atom or a particular substituent.

The present invention relates to a composite semipermeable membrane including: a substrate; a porous support layer disposed on the substrate; and a separation functional layer disposed on the porous support layer, in which the separation functional layer includes: a first layer including a crosslinked aromatic polyamide; and a coating layer existing on the first layer and including an aliphatic polyamide including a fluorine atom, and the composite semipermeable membrane has a proportion of the number of fluorine atoms to the total number of atoms of all elements of 0.5% or more and 8% or less, and has a ratio (N/O ratio) of the number of nitrogen atoms to the number of oxygen atoms of 0.8 or more and 1.3 or less.

The present disclosure relates to a highly-permeable microporous thermally crosslinked polymer membrane obtained by thermally crosslinking halogenated aromatic polymers having multiple benzene rings and a halogenated benzene ring, and a preparation method thereof. The microporous thermally crosslinked polymer membrane according to an embodiment of the present disclosure has a dramatically increased free volume, thus enabling excellent gas separation performance, particularly high gas permeability, and improved plasticization resistance, chemical resistance, and durability.

A two-layer photo-responsive membrane including a polymer layer and a support layer, the polymer layer being disposed on a surface of the support layer. The polymer layer is formed of a graft copolymer that contains a hydrophobic backbone and multiple side chains, the side chains each consisting of repeat units that switch between a hydrophobic form and a hydrophilic form upon exposure to a light of a specific wavelength. The polymer layer has a molecular weight cut-off of 3,000 to 250,000 Daltons and a thickness of 50 nm to 10 ?m; and the support layer has a molecular weight cut-off of 50 to 250,000 Daltons. Also disclosed is a method of preparing this two-layer photo-responsive membrane.

Provided are a polyethylene microporous membrane, a method for manufacturing the same, and a separator including the microporous membrane. According to an embodiment, a polyethylene microporous membrane which has a thickness of 3 ?m to 30 ?m, a puncture strength of 0.15 N/?m or more, a shrinkage rate in the transverse direction of 5% or less as measured after being allowed to stand at 121? C. for 1 hour, and a PS index represented by the following Equation 1 of 110 or more is provided:

PS index=[gas permeability (?10.sup.31 5 Darcy)?porosity (%)]+[shrinkage rate (%) in the transverse direction at 121? C.]. [Equation 1]

The problem of the present invention is to provide a novel polytetrafluoroethylene porous film having a small pore diameter, small film thickness, high porosity, and high strength, and a production method thereof. The present invention provides a polytetrafluoroethylene porous film, wherein a bubble point in isopropyl alcohol (IPA) according to JIS K3832 is not less than 400 kPa, and a tensile strength based on JIS K6251 is not less than 50 MPa.

Disclosed herein are a series of terpolymers, comprising hydrophobic, anionic, and cationic repeat units; and their use in anti-fouling coatings and highly fouling-resistant membrane filters whose selectivity can be controlled through the modulation of the polymer composition. Also provided are methods of purifying compositions such as peptides and proteins, or methods of decontaminating or removing an organic solute from water using the membrane filters of the invention.

A two-layer membrane including a polymer layer and a support layer, the polymer layer being disposed on a surface of the support layer. The polymer layer, having a pore size of at most 50 nm and a thickness of 5 nm to 10 m, is formed of an amphiphilic copolymer that contains both charged groups and hydrophobic groups. The support layer has a pore size of 3 nm to 10 m, which is larger than the pore size of the polymer layer. Also disclosed is a process of filtering a liquid using the two-layer membrane described above.