摘要:
Disclosed are an amine aqueous solution for forming an active layer of a polyamide reverse osmosis composite membrane and a preparation method of the polyamide reverse osmosis composite membrane using the same. The amine aqueous solution comprises 0.1 to 20 wt % of a polyfunctional amine compound, 0.1 to 20 wt % of an alcohol amine compound, 0.1 to 20 wt % of a tertiary amine compound, and 40 to 99.7 wt % of water. Due to using an amine aqueous solution having an alcohol amine and a tertiary amine compound, the polyamide reverse osmosis composite membrane has high water permeability and enhanced salt rejection rate, and thus is useful for the membrane field.
摘要:
A preparation method of a polyamide thin film composite reverse osmosis membrane and a polyamide thin film composite reverse osmosis membrane prepared using the preparation method are provided. The preparation method of a polyamide thin film composite reverse osmosis membrane using interfacial polymerization of an amine aqueous solution and amine-reactive compound includes the steps of (a) forming an active layer through interfacial polymerization by contacting a surface of a porous support with an amine aqueous solution containing a polyfunctional aromatic amine monomer and an organic solution containing polyfunctional acyl halide monomer as an amine-reactive compound, and (b) performing post-treatment preceded by the forming of the active layer by contacting the active layer with an aqueous solution containing 0.1 to 100 wt % of polyfunctional tertiary alcohol amine. The polyamide thin film composite reverse osmosis membrane prepared by using the polyfunctional tertiary alcohol amine as a post-treatment compound has improved water permeability and salt rejection compared to a case of using various post-treatment agents or methods.
摘要:
Disclosed herein is a spiral wound type filter cartridge and more specifically, a spiral wound type filter cartridge in which activated carbon fiber is provided. The inside of spiral wound type filter cartridge is capable of serving as a carbon filter in a water purifier, thus eliminating the necessity of the use of any carbon filter for pre- or post-treatment in the process of purifying raw water, reducing an overall size of the water purifier and considerably reducing costs associated therewith.
摘要:
An array substrate for a liquid crystal display device includes a plurality of gate lines on a substrate; a plurality of data lines crossing the plurality of gate lines to define a plurality of pixel regions; a thin film transistor connected to one of the plurality of gate lines and one of the plurality of data lines and disposed in one pixel region of the plurality of pixel regions; first and second shield patterns respectively extending from a previous gate line of the plurality of gate lines to the one pixel region, the first shield pattern disposed at one side of the one pixel region, and the second shield pattern disposed at the other side of the one pixel region; and a pixel electrode in the one pixel region and over the thin film transistor, the pixel electrode overlapping the first and second shield patterns and the previous gate line.
摘要:
A method of manufacturing an electronic device, which can obtain sufficient manufacturing margins and reduce a defect rate by compensating for a threshold voltage variation caused by the variation of a critical dimension (CD) of a gate electrode. An ion implanter controller and an ion implantation system perform the method. In the method, an ion implantation recipe for forming a junction contact plug of a transistor formed on the wafer is adjusted based on the measured CD. Then, ions are implanted into the wafer by using the adjusted ion implantation recipe. All defects that may occur in the transistor during previous manufacturing steps can be repaired after the transistor is formed, thus enhancing manufacturing margins.
摘要:
An amine aqueous solution for forming an active layer of a polyamide reverse osmosis composite membrane is prepared, which consists of 0.1 through 20 weight % of polyfunctional aromatic amine monomer, 0.1 through 20 weight % of multi-functional tertiary alcohol amine, 0.1 through 20 weight % of strong acid, and 40 through 99.7 weight % of water.
摘要:
A method for manufacturing a semiconductor device comprises the steps of extracting an optimal working condition by accumulatively averaging accumulated working conditions of lots previously performed in an expectation process to be currently performed in the manufacturing equipment, extracting a correction condition by extracting information for an alignment state of a lower layer performed by the expectation process, and setting the working condition by adding the correction condition to the optimal working condition.