Lg Chem, Ltd

Hyungjoon Jeon

Chong Kyu Shin

Youngju Lee

Byoungsoo Lee

Eunkyoung Byun

Taehyeong Kim

Lakwon Choi

Bong Ju Kwak

Young Jun Shin

Hyelim Kang

Danbi Han

Ja Min Hong

Eun Woo Cho

Young Jun Shi

Provided is a method for detecting defects of a separation membrane element, and an apparatus for detecting defects of a separation membrane element.

Method of detecting defects in separation membrane element and apparatus for detecting defects in separation membrane element

Provided is a method for manufacturing a water-treatment membrane, the method including bringing an aqueous solution including free chlorine and a halogen ion into contact with a polyamide active layer, wherein the free chlorine is present in an amount from 150 ppm to 400 ppm and the halogen ion is present in an amount from 150 ppm to 400 ppm based on the aqueous solution, and a water-treatment membrane manufactured using the same.

Method for preparation of water-treatment separation membrane and water-treatment separation membrane prepared thereby

Provided is a water-treatment membrane including a porous support; and a polyamide active layer including chlorine on a surface thereof, wherein CIE L*a*b* color coordinate values after storing for 30 days or longer at 25&#xb0; C. to 80&#xb0; C. satisfy Equation 1 to Equation 3:91&#x3c;*&#x3c;97&#x2003;&#x2003;&#x3c;Equation 1&#x3e;&#x2212;1.5&#x3c;*&#x3c;1.5&#x2003;&#x2003;&#x3c;Equation 2&#x3e;&#x2212;1.5&#x3c;*&#x3c;8&#x2003;&#x2003;&#x3c;Equation 3&#x3e; of the present disclosure, a water-treatment module including the same, and a method for manufacturing the same.

Water treatment separation membrane, water treatment module comprising same, and manufacturing method therefor

Provided is a water treatment membrane including: a porous support; and a polyamide active layer provided on the porous support, in which the polyamide active layer includes one or more units selected from among a unit of Chemical Formula 1: a unit of Chemical Formula 2; a unit of Chemical Formula 3; and a unit of Chemical Formula 4; and a manufacturing method thereof.

Water treatment membrane and method for manufacturing same

The present specification provides a method for manufacturing a water-treatment separation membrane, the method comprising: preparing a porous support; forming a polyamide active layer on the porous support by using an interfacial polymerization of an aqueous solution comprising an amine compound and an organic solution comprising an acyl halide compound; and coating a coating solution comprising a random copolymer comprising the monomers represented by Chemical Formulae 1 to 3 onto the polyamide active layer, in which a content of the random copolymer is 0.5 wt % to 2 wt % based on a total weight of the coating solution, a water-treatment separation membrane manufactured by using the same, and a water treatment module comprising the water-treatment separation membrane.

Method for manufacturing water treatment separator, water treatment separator manufactured using same, and water treatment module comprising water treatment separator

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Daejeon, South Korea

Hyungjoon Jeon