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Adsorptivity toward heavy metal ions of chelating resins with dithiocarbamic acid groups
방영길,박인환,김경만,이종문 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
Macroreticular copolymer beads were prepared by suspension polymerization of styrene, methylmetacrylate and divinylbenzene in the presence of a diluent. Accordingly, the carboxylic ester groups of copolymer beads were chloromethylated after hydroxymethylated in advance, whereas the phenyl ring of copolymer beads were directly chloromethylated. For the preparation of dithiocarbamic acid groups, the reactive sites were prepared by addition of primary amine to the chloromethylated resins. Cheating resins with salt of dithiocarbamic acid groups could be prepared by addition of the reactants to carbon disulfide under alkali media. Then, the dithiocarbamic acid groups could be directly bound to carbon atoms in the main chain, and at the same time to the pendant phenyl groups. The Cheating resins showed high adsorption capacity for heavy metal ions like Pb<sub>2+</sub>, Hg<sub>2+</sub>, Ni<sub>2+</sub>, and Cr<sub>3+</sub>, etc; the resins with benzene spacer units were more adsorptive than those without benzene spacer units. Also, the adsorption tendency toward mercuric ions were newly observed.
Adsorptivity toward heavy metal ions of chelating resins with thiol groups
방영길,박인환,김경만,이종문 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
For the functional enhancement on metal ion chelation, macroreticular copolymer beads were prepared by suspension polymerization of styrene, methylmethacrylate and divinylbenzene in the presence of a diluent. Accordingly, the carboxylic ester groups of copolymer beads were chloromethylated after hydroxymethylated in advance, whereas the phenyl ring of copolymer beads were directly chloromethylated. An indirect method for the conversion of chloromethylated groups to thiol groups consisted of treatment with thiourea to give an isothiuronium salt, which with alkali was cleaved to the mercaptan. Then, the thiol groups could be directly bound to carbon atoms in the showed high adsoption capacity for mercury ions. Also, the resin with benzene spacer units for thiol groups was highly effective for the adsorption of mercury ions:P when the thiol groups were utilized as a chelator heavy metal ions, it was very available to consider spacer effects among the groups on metal ion chelation.
글루카민기 변성 킬레이트 수지의 합성 및 보론 제거 특성 향상
방영길(Young-Kill Bang),박창현(Changhyun Park),한정현(Jung Hyun Han),이태진(Tae Jin Lee),최영주(Youngju Choi),김형일(Hyung-Il Kim) 한국고분자학회 2018 폴리머 Vol.42 No.3
수처리 시스템에 적용하기 위하여 보론 제거용 소재로 poly(St-co-DVB) 가교중합체, poly(St-co-MMA-co-DVB) 가교공중합체 및 poly(St-co-GMA-co-DVB) 가교공중합체를 현탁중합으로 합성하였다. 이러한 가교중합체에 대하여 클로로메틸화 반응을 거쳐 글루카민기가 도입된 킬레이트 수지를 제조하였으며, 이들의 구조적 차이에 따른 보론 제거특성을 평가하였다. 각각의 킬레이트 수지는 평균 입경 500 μm 구형으로서 다공성을 나타냈다. Poly(Stco-DVB) 기반의 킬레이트 수지에 비하여 poly(St-co-MMA-co-DVB) 및 poly(St-co-GMA-co-DVB) 기반의 킬레이트 수지의 비표면적과 세공용적이 더 크게 나타났다. 이러한 3종류 킬레이트 수지에 대한 보론 이온의 흡착량은 각각 6.9, 6.7, 10.2 mg/g-resin으로 나타나 poly(St-co-GMA-co-DVB) 기반의 킬레이트 수지의 보론 제거 특성이 가장 우수하였다. Poly(St-co-DVB) crosslinked polymer, poly(St-co-MMA-co-DVB) crosslinked copolymer, and poly(St-co-GMA-co-DVB) crosslinked copolymer were synthesized by suspension polymerization in order to apply these to the water treatment system. These crosslinked polymers were subjected to the subsequent chloromethylation reaction to prepare chelate resins having glucamine groups and the boron removal characteristics of chelate resins were evaluated depending on their structural differences. Each of chelate resins exhibited porous spherical particle shape having an average particle size of 500 nm. Poly(St-co-MMA-co-DVB) and poly(St-co-GMA-co-DVB) based chelate resins showed both larger specific surface area and pore volume than poly(St-co-DVB) based chelate resin. The adsorption amounts of boron ions on these three different chelate resins were 6.9, 6.7, and 10.2 mg/g-resin, respectively. Therefore, poly(St-co- GMA-co-DVB) based chelate resin showed the best boron removal characteristics.
혼합용매에 의한 단순화 반응 기반 다중 관능기 도입 킬레이트 수지의 합성 및 보론 흡착특성 향상
방영길(Young-Kill Bang),박창현(Changhyun Park),한정현(Junghyun Han),이태진(Taejin Lee),최영주(Youngju Choi),정진미(Jinmi Jung),김형일(Hyung-Il Kim) 한국고분자학회 2020 폴리머 Vol.44 No.3
수처리 시스템에 적용하기 위한 보론 흡착용 기본 수지로 poly(St-co-DVB) 가교중합체를 현탁중합으로 합성하였다. 기본 수지에 대하여 염화메틸화 반응을 거쳐 글루카민기가 도입된 킬레이트 수지를 평균 입경 500 μm 구형의 고다공성 수지로 합성하였다. 이러한 반응과정에서 혼합용매와 상용화 용매를 사용하여 상분리 없이 반응단계를 간소화하여 킬레이트 수지를 합성하였다. 글루카민기의 입체장애에 따라 글루카민 치환반응이 원활히 진행되지 못하는 문제점을 하이드록시기를 갖는 저분자량 아미노알코올을 사용하여 해결함으로써 보론 이온 흡착률이 30% 이상 향상된 새로운 구조의 킬레이트 수지를 합성하였다. 이러한 킬레이트 수지에 대해서 가교제 함량, 글루카민기 및 아미노알코올기 도입이 보론 흡착특성에 미치는 영향을 조사하였다. Poly(St-co-DVB) crosslinked polymer was synthesized by suspension polymerization as a base material for boron adsorption in order to apply to the water treatment system. Poly(St-co-DVB) crosslinked polymer was subjected to chloromethylation reaction to synthesize various chelate resins having glucamine groups, as porous spherical particles of an average size of 500 μm. The chelate resins were synthesized by the simplified reaction of chloromethylation and glucamine substitution without phase separation by applying mixed solvent and compatibilizing solvent. Chelate resins with the new structure were synthesized using low molecular weight amino alcohol containing a hydroxyl group in order to solve the steric hindrance problem among glucamine groups in the substitution reaction. As a result, the new structure of chelate resin enabled the adsorption of boron ion to be improved more than 30% higher. Boron removal characteristics of chelate resins were evaluated depending on crosslinking agent content and introduction of both glucamine and aminoalcohol groups.