Lg Chem, Ltd

Lg Nanoh2o, Inc.

Youngsik Eom

Hyungsam Choi

Byungguk Kim

Yunah Yu

Sanggon Kim

Chong Kyu Shin

Alberto Goenaga

Christopher James Kurth

Sung Yeol Choi

Duk Hun Jang

Brett Anderson Holmberg

Jin Kuk Lee

Jeff Koehler

Robert Leon Burk

Keun Won Song

Sungyeol Choi

Andrew Ford

Amit Sankhe

There is provided a polyamide-imide resin film including a polyamide-imide block copolymer having a specific structure and having a predetermined retardation.

Polyamide-imide resin film

The present invention relates to a polyamide-imide resin film having a low birefringence index, including: a polyamide-imide block copolymer containing an amide repeating unit to which an isophthaloyl group and an aromatic diamine residue are bonded; an imide repeating unit; and a trivalent functional group containing an aromatic tricarbonyl group.

The present application relates to a polymer, a method for manufacturing the same, and an electrolyte membrane including the same.

Polymer, method for manufacturing same, and electrolyte membrane comprising same

Provided is an interfacial polymerization process for preparation of a highly permeable thin film composite membrane, which can be used for nanofiltration, forward osmosis, or reverse osmosis, particularly for use with brackish water or seawater. The process includes contacting a porous support membrane with an aqueous phase containing a polyamine to form a coated support membrane, and applying an organic phase containing a polyfunctional acid halide to the coated support membrane to interfacially polymerize the polyamine and the polyfunctional acid halide to form a discrimination layer of a thin film composite membrane, where the aqueous and/or organic phases include a flux-enhancing additive and a boron rejection-enhancing additive that includes a biguanide compound, dicarbonate compound, pentathiodicarbonate compound, or salts thereof. Also provided are the membranes prepared by the methods and reverse osmosis modules containing the membranes.

Additives for boron rejection enhancement of a membrane

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Daejeon, South Korea

Youngsik Eom