Abstract:
본 발명은 팽윤성과 흡착성이 우수한 이온교환수지에 관한 것으로, 보다 상세하게는 카르복실산이 있는 단량체 아크릴산계와 가교제인 폴리에틸렌글리콜디아크렐레이트(poly(ethylene glycol) diacrylate)의 현탁중합을 통하여 이온교환수지를 제조함을 목적으로 한다. 본 발명은 기공의 형성으로 비표면적이 상승하여 고흡착성의 성질을 가지며, 아크릴기를 함유하고 있어 고 팽윤성을 가지는 특징이 있다. 본 발명은 해수에서 인듐의 흡착에 응용이 가능하다.
Abstract:
PURPOSE: An anion exchange membrane for nitrate nitrogen removal and a manufacturing method thereof are provided to reduce the processing cost due to the optimum synthetic condition without requiring complex processes, and to have the excellent selectivity to nitrate nitrogen. CONSTITUTION: A manufacturing method of an anion exchange membrane for nitrate nitrogen removal comprises the following steps: a step of manufacturing a first polymer by polymerizing 4-vinylbenzyl chloride, styrene and acrylic monomer; a step of manufacturing a second polymer by reacting an aminating agent, which is any one selected from tripropylamine and tributylamine, or their mixture, with the first polymer; and a step of manufacturing an anion exchange membrane by using the second polymer.
Abstract:
PURPOSE: An ion exchange resin is provided to have high absorptive property because a specific surface area is increased by forming pores, to have excellent swelling performance by containing acryl group, and to be used for absorption of cobalt in seawater. CONSTITUTION: A manufacturing method of an ion exchange resin comprises: a step of suspension polymerization of an acrylic acid monomer indicated in chemical formula 1 and poly(ethylene glycol) diacrylate indicated in chemical formula 2. In the chemical formulas, R1 is H or a methyl group and n is an integer from 7-14. An initiator is one compound or a mixture of two compounds selected from benzoyl peroxide, dicumyl peroxide and azobisisobutyronitrile.
Abstract:
PURPOSE: An ion exchange resin for recovering indium with excellent swelling performance and absorptivity because indium can be moderately collect from seawater. CONSTITUTION: A manufacturing method of an ion exchange resin for recovering indium comprises: a step of suspension polymerization of an acrylic acid monomer indicated in chemical formula 1 and poly(ethylene glycol) diacrylate indicated in chemical formula 2. In chemical formulas, R1 is H or a methyl group and n is an integer from 7-14. A solvent of an initiator is toluene. The acrylic acid monomer is 16-20 weight% based on total weight of ion exchange resin for indium collection.
Abstract:
PURPOSE: A manufacturing method of high porous lithium manganese oxide based epoxy spherical composite using a template carbonization and a spray-drying method are provided to synthesize lithium manganese oxide having low-density, large specific surface area, and high porosity. CONSTITUTION: A manufacturing method of lithium manganese oxide based epoxy spherical composite comprises the following steps: mixing a binder resin composition with an inorganic compound; spraying the mixture on a fluorinated plate and manufacturing a spherical shaped composite by heat-treating; and acid processing the spherical shaped composite. The lithium manganese oxide based spherical shaped composite has a specific surface area of 40-60m^2/g and a pore volume range of 0.20-0. 40cm^3/g. The heating is processed at 450-520 deg. Celsius for 3-6 hours. In the mixing step, the binder resin composition comprises 5-15 parts by weight of imidazole based compound and 80-100 parts by weight of epoxy resin based on 100.0, parts by weight of phenol type curing agent. 30-70 wt% of solvent is included based on 100.0 wt% of the total weight portion. In the mixing step, the binder resin composition and the inorganic compound are mixed at a weight ratio of 1:1-3:1.
Abstract:
PURPOSE: The preparation of an organic-inorganic hybrid ion-exchanging membrane is provided to improve the ion conductivity and the ion exchanging capability of the ion-exchanging membrane by blending antimony oxide, styrene-butadiene-styrene, sulfonated polystyrene. CONSTITUTION: Sulfonic acid group substituted polystyrene and styrene-butadiene-styrene are mixed under inert gas. Antimony oxide is added into and mixed with the mixture. The mixture is coated on a base material. A hybrid ion-exchanging membrane is obtained based on a cross-linking reaction at a temperature between 80 and 100 degrees Celsius. The sulfonic acid group substituted polystyrene is obtained by adding polystyrene and sulfonic acid into chloromethane, and a sulfonization process is implemented.