• 제목/요약/키워드: polyethyleneimine

검색결과 78건 처리시간 0.032초

구아니딘화 폴리에틸렌이민이 처리된 폴리프로필렌 부직포의 군사용 화학 작용제 제독 특성 (Detoxification Properties of Guanidinylated Polyethyleneimine Treated Polypropylene Non-woven Fabric Against Chemical Warfare Agents)

  • 김지윤;권웅;김창규;정의경
    • 한국염색가공학회지
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    • 제33권1호
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    • pp.1-9
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    • 2021
  • This study aims to prepare the fabric with detoxification properties against chemical warfare agent by the simple treatment. For this purpose, polypropylene non-woven fabric(PP) was treated with polyethyleneimine(PEI) and guanidinylated PEI and detoxification properties of the guanidinylated PEI treated PP were evaluated using diisopropylfluorophosphate(DFP), as a chemical warfare agent simulant, and compared with the untreated and PEI treated PP. The half-lives of DFP on guanidinylated PEI treated PP and untreated PP were 334 min and 714 min, respectively. The half-life of DFP with guanidinylated PEI treated PP was 53.22% shorter than with untreated PP. This result shows that guanidine group in guanidinylated PEI treated PP was acted as a base catalyst for hydrolysis of DFP and decreased half-life of DFP. Therefore, it is expected that guanidinylated PEI treatment can be an simple pathway to prepare the detoxification fabric material for protective clothing against chemical warfare agents.

PEI를 처리한 면직물의 다색성 천연염료에 대한 염색성 변화 (A Study on Dyeability of PEI-treated Cotton Fabric with Polychromatic Natural Dyes)

  • 이보영;유효선
    • 한국의류학회지
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    • 제37권4호
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    • pp.590-597
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    • 2013
  • This study examined the change in the dyeability of natural dyes on cotton fabrics by a PEI (polyethyleneimine) pretreatment instead of mordants. Cotton fabrics were treated with PEI and the changes in the dyeability were shown by measuring the amount of PEI on cotton fabrics. Samples treated with PEI were dyed with two natural polychromatic dyes with a different affinity to cotton fibers: Alizarin Red S and Curcumin. The changes in dyeability by three variables (time, temperature and concentration of dyes) on cotton fabrics were analyzed by the K/S value to define optimum dyeing conditions. Subsequently, the PEI treatment improved the dyeability of cotton fabrics with both dyes of low and high affinity to cotton fibers. Thus, PEI could be a suitable heavy metal mordant replacement.

Methyl- $\beta$ -D-Fructofuranoside 합성을 위한 고정화 전화당 효소의 미소환경 최적화 (Microenvironmental Optimizaton of Immobilized Invertase for Methyl- $\beta$ -D-Fructofuranoside Synthesis)

  • 허주형;안형환
    • 대한안전경영과학회지
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    • 제1권1호
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    • pp.259-272
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    • 1999
  • In order to enhance the selectivity, productivity and yield of methyl fructoside, which was synthesized by enzymatic glycosylation of sucrose and methanol solution, controlling of surface property of solid support using different immobilization procedures optimized microenvironment of immobilized invertase. Silanization and polyethylene imine coating methods were adopted to give a hydrophobic and hydrophilic environment of immobilized invertase. As a result, polyethyleneimine coating method gave higher loading of enzyme, effective activity, and relative activity than silanization method, because it brought on increasing the functional density of amino group and enhancing the conservation of activity by regulating of hydrophilicity. And then, hydrophilic environment was possible to restraint the assessing of methyl fructoside molecule, which was more hydrophobic than sucrose, fructose, and glucose molecule in the reaction mixture, into .the active site of immobilizedinvertase. Consequently, hydrophilic microenvironment of immobilized invertase by polyethyleneimine coating obtained higher yield and productivity with increasing conversion than silanized and native invertase. Thus, this procedure optimized the microenvironment of immobilized invertase suitable for the enzymatic synthesis of methyl fructoside.

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Glucose Diffusion Limiting Membrane Based on Polyethyleneimine (PEI) Hydrogel for the Stabilization of Glucose Sensor

  • Kim, Suk-Joon;Shin, Woonsup
    • Journal of Electrochemical Science and Technology
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    • 제12권2호
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    • pp.225-229
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    • 2021
  • Commercially available continuous glucose sensors require the operation stability for more than two weeks. Typically, the sensor comprises a sensing layer and an over-coating layer for the stable operation inside the body. In the sensing layer, enzymes and mediators are cross-linked together for the effective sensing of the glucose. The over-coating layer limits the flux of glucose and works as a biocompatible layer to the body fluids. Here, we report the simple preparation of the flux-limiting layer by the condensation of polyethyleneimine (PEI), tri-epoxide linker, and trimethylolpropane triglycidyl ether (PTGE). The sensor is constructed by a layer-by-layer drop-coating of the sensing layer containing glucose dehydrogenase and the PEI-derived blocking layer. It is stable for more than 14 days, which is enough for the sensor in the continuous monitor glucose monitoring (CGM) system.

수포작용제 방호성능이 향상된 선택투과막 제조 (Preparation of Selectively Permeable Membrane Materials with Enhanced Protective Capability against Blister Agents)

  • 권태근;김진원;강재성;박현배;이해완;서현관
    • 멤브레인
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    • 제24권2호
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    • pp.167-175
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    • 2014
  • 수증기 투과성과 DMMP 방호성능을 가지는 cellulose acetate butyrate (CAB)/polyethyleneimine (PEI) 기반의 선택투과막에 대해 여러가지 첨가제를 적용하여 CEES에 대한 방호성능 개선을 시도하였다. 시험결과, CAB/PEI 기반의 선택투과막은 수증기 투과성은 그대로 유지하면서(${\geq}1,800g/m^2/day$), CEES에 대한 방호성능의 개선을 보여주었다($7.1{\sim}11.5{\mu}g/cm^2{\cdot}24hr$). 이 중, $Ag^+$ 이온과 이온교환수지 혼합물을 포함한 CAB/PEI 선택투과막에서 가장 우수한 방호성능을 확보하였다. 그리고 시험한 모든 선택투과막은 생물학작용제를 모사할 수 있는 다양한 크기의 에어로졸 입자($0.005{\sim}3{\mu}m$)에 대해서도 방호성능을 가짐을 확인하였다.

폴리에틸렌이민이 함침된 흄드 실리카 입자를 이용한 이산화탄소 흡착 소재의 제조 및 특성 (Synthesis and Characterization of Carbon Dioxide Sorbent by using Polyethyleneimine Impregnated Fumed Silica Particles)

  • 황하수;박인;이일기;최원준;이상일;이준영
    • 공업화학
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    • 제23권4호
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    • pp.383-387
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    • 2012
  • This paper presents an easy way to prepare carbon dioxide sorbent by using commercially available fumed silica particles (AEROSIL). AEROSIL was impregnated with various concentration of polyethyleneimine (PEI) in methanol and $CO_2$ capture ability was analyzed by thermo gravity analysis (TGA). The $CO_2$ adsorption capacity of 50 wt% PEI-impregnated AEROSIL was 126.2 mg/g-sorbent at $75^{\circ}C$ and this capacity was substantially higher than that of the mesoporous silica such as HMS (101.0 mg/g-sorbent) and MSU-J (66.1 mg/g-sorbent).

손상된 역삼투막의 in-situ 힐링을 통한 막 성능 복원 (Restoration of Membrane Performance for Damaged Reverse Osmosis Membranes through in-situ Healing)

  • 윤원섭;임지원;조영주
    • 멤브레인
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    • 제29권2호
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    • pp.96-104
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    • 2019
  • 본 연구는 분리막 성능 저하로 기능을 상실한 역삼투막의 힐링을 통한 복원의 가능성을 알아보고자 하는 데에 목적이 있다. 손상된 막은 양이온고분자인 poly(styrene sulfonic acid) sodium salt (PSSA)와 음이온고분자인 polyethyleneimine(PEI)를 염석법을 이용하여 이중으로 코팅했으며 또한 소재의 순서를 바꿔 코팅을 수행했다. 그리고 농도, 시간, 이온세기 등에 따라 코팅된 역삼투막의 투과도와 배제율을 측정하여 손상된 막으로부터 복원된 정도를 알아보았다. 또한 역삼투 평막에서 복원이 우수한 조건을 가정용 정수기 모듈에 적용하여 손상된 역삼투막 모듈에 또한 대하여 복원 가능성을 알아보았다. 이로부터 PEI 30,000 ppm (IS = 0.1)/PSSA 20,000 ppm (IS = 0.7) 코팅 조건에서 역삼투막 모듈에 적용했을 때 염 배제율은 69%에서 86% (손상 전 모듈의 경우 90%)까지 복원되었다.

스마트 의류용 전도성 직물의 제조 및 특성 분석 (Fabrication of active cooling e-Textiles)

  • 이승아;이창환;김기태;김주용
    • 한국염색가공학회지
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    • 제20권6호
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    • pp.82-86
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    • 2008
  • Cooling function is definitely one of the most desirable attribute of clothing. In spite of the recent progress on phase changing material(PCM) research, the final products with sufficient amount of cooling capability have not yet to be developed in market. A new concept of cooling fabrics has been proposed by applying "Peltier effect" to textile materials. It occurs whenever electrical current flows through two dissimilar conductors; depending on the direction of current flow, the junction of the two conductors is absorbed or released heat. This effect has been tested on P-type and N-type conducting polymers. A P-type conductive polypyrrole coated fabric was synthesized by in-situ polymerization on plain weave PET to make conductive fabrics. And an N-type electrically conductive material was synthesized by treatment of MWNT and polyethyleneimine(PEI). A noticeable amount of temperature difference has been found on the fabrics.