• 제목/요약/키워드: Perfluorinated Compounds

검색결과 43건 처리시간 0.028초

Perfluorinated Compounds (PFCs) 안정화 시스템의 연구 (The Study of Emulsion System Containing with Perfluorinated Compounds (PFCs))

  • 최봉기;조희원;김효정;이주동
    • 대한화장품학회지
    • /
    • 제33권4호
    • /
    • pp.239-243
    • /
    • 2007
  • PFCs는 독특한 사용감과 특성으로 인하여 화장품에 응용되어질 때 많은 특장점을 가지고 있다. 그러나 이러한 장점에도 불구하고 화장품 제형에 적용하기에 많은 어려움을 가지고 있다. 즉, 물과 오일에 불용성, 높은 비중, 높은 증기압 등과 같은 원료의 특징으로 인하여 PFCs는 화장품에 적용하기 위하여 특별한 안정화 시스템을 필요로 한다. 본 연구에서 PFCs를 안정화하기 위하여 gel network, spherulite lamellar, nanostructure 이상의 세 가지 시스템을 이용하였으며 사용된 세 가지 시스템 중 nanostructure system이 가장 안정함을 알 수 있었다.

환경 및 생체시료 중 과불화 화합물의 분석 동향 (Analytical trend of perfluorinated compounds in environmental and biota samples)

  • 이원웅;장원희;표희수;강태석;홍종기
    • 분석과학
    • /
    • 제23권4호
    • /
    • pp.331-346
    • /
    • 2010
  • 과불화 화합물(perfluorinated compounds, PFCs)은 열과 산성, 염기 등과 같은 화학적 조건에 높은 안정성을 갖고 있을 뿐만 아니라 발수성, 발유성, 방오성과 제품 친화적인 특징 때문에 다양한 산업소재로 활용되고 있으며, 근래에 이르러서는 대규모로 생산되고 있는 산업제품이다. 그러나 난분해성으로 인하여 환경 내에 잔류하여 전세계적으로 널리 분포하고 있을 뿐만 아니라 인체나 동식물에 이르는 생물체에 이르기까지 오염되어 분포하고 있다. 또한 인체를 비롯한 생물체에 장기적으로 축적될 시 암등을 유발할 가능성이 있다고 보고됨에 따라 이에 대한 관심이 증가하고 있다. 최근 스톡홀름 협약에서 과불화 화합물을 새로운 환경지속성오염물질(persistent organic pollutants, POPs)로 규정함에 따라 이에 대한 분석법의 중요성이 대두되고 있다. 본 연구에서는 다양한 환경 및 생체 시료 내에서 과불화 화합물의 분석법에 대한 연구의 중요성 및 문제점과 더불어 최근 연구 동향을 소개하였다.

Synthesis of Perfluorinated Heterocyclic Compounds Having a Long Alkyl Chain Functionality by 1,3-Dipolar Cycloaddition

  • Lee, Chan-Woo;Hwang, Ho-Yun;Park, Joo-Yuen;Chi, Ki-Whan
    • Bulletin of the Korean Chemical Society
    • /
    • 제31권5호
    • /
    • pp.1305-1308
    • /
    • 2010
  • Regioselective perfluorinated isoxazolidine (5 and 7), isoxazoline (9) and 1,2-addition products (6 and 8) having a long alkyl chain functionality have been prepared by 1,3-dipolar cycloaddition between a 1,3-dipole (NH-nitrone or nitrile oxide) and dipolarophile (perfluoro-2-methyl-2-pentene or styrene), respectively. Interestingly, unusual extended conjugated form of isoxazoline adduct (10) was obtained by dehydrofluorinated reaction from the corresponding perfluorinated isoxazoline adduct (9) which was derived from cycloadition between the perfluorinated long alkyl nitrile oxide 1,3-diplole and styrene olefin. This synthetic methodology of heterocyclic compound having a long alkyl chain functionality is useful for the designing of synthetic strategy and potential self-assembled monolayers (SAM) application. These derivatives were characterized by IR, $^1H$ and $^{19}F$ NMR, and MASS analysis.

Regioselective 1,3-Dipolar Cycloaddition and 1,2-Addition between Benzaldoxime NH-nitrone and Perfluoro-2-methyl-2-pentene

  • Lee, Chan-Woo;Park, Joo-Yuen;Kim, Hyun-Uk;Chi, Ki-Whan
    • Bulletin of the Korean Chemical Society
    • /
    • 제31권5호
    • /
    • pp.1172-1176
    • /
    • 2010
  • Regioselective perfluorinated [3+2] cycloadducts and 1,2-adducts have been prepared by 1,3-dipolar cycloaddition between benzaldoxime NH-nitrone and perfluorinated alkene, perfluoro-2-methyl-2-pentene. Although the cycloaddition reaction is carried out at room temperature, the corresponding perfluorinated compounds are effectively produced in a high yield. In particular, the methoxy-substituted adducts (4 and 7a) show the self-assembled structure by intermolecular interactions. These derivatives were characterized by IR, $^1H$ and $^{19}F$ NMR, and the absolute structure of perfluorinated adducts was confirmed by X-ray crystallography.

과불화 화합물 (PFCs); 새로운 도전과 과제 (Perfluorinated Compounds; New Challenge and Problem)

  • 손희종;유수전;노재순
    • 대한환경공학회지
    • /
    • 제31권12호
    • /
    • pp.1151-1160
    • /
    • 2009
  • 전세계적으로 과불화 화합물들에 의한 오염은 심각한 수준에 도달해 있다. 이들은 난분해성으로 환경에 장기간 머물며 생물축적 (bioaccumulation) 및 생물확대 (biomagnification)의 원인 물질로 인간과 동물들에게 심각한 피해를 유발한다. 또한, 이들은 광분해, 생물분해 및 화학적인 분해에도 매우 큰 내성을 가지고 있기 때문에 상 하수 처리공정에서 과불화 화합물에 대한 제거율이 낮다. 국내의 경우는 아직까지 주요 하천과 호소에서의 이들의 오염현황에 대한 변변한 조사나 연구보고도 없는 실정이다. 본 논문에서는 과불화 화합물들에 대한 국내에서의 관심을 고조시키기 위해 과불화 화합물의 종류 및 유래, 위해성, 상수와 하수에서의 거동 및 처리공정으로 나누어 과불화 화합물들에 대해 간략하게 기술하였다.

굴포천에 서식하는 어류체내 과불화화합물 농축특성 (Bioconcentration of Perfluorinated Compounds in Fish from Gulpo Stream)

  • 조천래;조재구;엄익춘;이병천;김수진;최경희;윤준헌
    • Environmental Analysis Health and Toxicology
    • /
    • 제25권3호
    • /
    • pp.229-240
    • /
    • 2010
  • During the last decade, perfluorinated compounds (PFCs) have gained more attention due to their toxicity and global distribution. The aim of this study was to examine the distribution and bioaccumulation of perfluorinated compounds (PFCs) in aquatic wildlife effected from a sewage treatment plant. The concentrations of 12 PFCs were determined in water, sediment and fish samples. PFOS were predominantly detected in both ambient environment and fish. In fish, the concentration of PFCs in blood was the highest (i.e., 112.47 ng/mL wet-wt. PFOS) in comparison to other tissues. However, PFOA and PFHpS were highly detected in gonad as 3.87 and 4.58 ng/g wet-wt., respectively. The bioconcentration factor (BCF) of PFCs was greatest in the blood > liver${\cong}$gonad > kidney > gill, and lowest in the muscle tissue. The BCFs of PFUnDA (39,000), PFDA (2,700) and PFOS (1,100) were rated as high values based on wet weight concentration. BCFs increased with increasing the length of the perfluoralkyl chain.

제주도 쓰레기매립장 침출수 중 과불화화합물의 검출 특성 (Characteristics of Perfluorinated Compounds Detected in Landfill Leachates on Jeju Island)

  • 백병천;감상규
    • 한국환경과학회지
    • /
    • 제30권8호
    • /
    • pp.673-684
    • /
    • 2021
  • Raw leachates from three landfills and treated leachates from two landfills on Jeju Isalnd were analyzed for ten perfluorinated compounds (PFCs) detected in aquaruc environments. The leachates were collected six times in 2014 and 2015. Among the ten PFCs, three were not detected, namely perfluoroundecanoic acid (PFUnDA), perfluorododecanoic acid (PFDoDA), and perfluorodecane sulfonate (PFDS). The total concentrations of PFCs ranged as 724-3313 ng/L (mean 1999 ng/L) in raw leachates and from less than the limit of quantification (LOQ) to 394 ng/L (mean 133.2 ng/L) in treated leachates. The domonant compounds measured were perfluorooctanoic acid (PFOA) (mean contribution 37.7%) and perfluorobutane sulfonate (PFBS) (mean contribution 38.2%) in raw leachates, and PFOA (mean contribution 40.7%), perfluorohexanoic acid (PFHxA) (mean contribution 27.3%) and PFBS (mean contribution 26.5%) in treated leachates. No significant correlations were observed between total/several individual PFCs and leachate pH and CODCr, which may be due to complex chemical nature of landfill leachates and characteristics of waste and landfills.

Alicyclic 1,2-디할로폴리플루오르올레핀으로 부터 비닐리튬 화합물과 Perfluorinated 유기금속화합물의 합성 (The Preparation of Perfluorinated Organometallic Compounds via Vinyllithium Compounds of Alicyclic 1,2-Dihalopolyfluoroolefins)

  • 박달조;최삼권
    • 대한화학회지
    • /
    • 제17권4호
    • /
    • pp.286-297
    • /
    • 1973
  • 폴리플루오로알켄닐리튬 化合物들이 1,2-dihalopolyfluorocycloalkenes와 알킬리튬試藥과의 交換反應에 依하여 合成되었다. 수은, 비소와 디메틸게르마늄할로겐화물과의 여러 가지 反應이 著述되어 있고 또 이 化合物들의 化學的性質에 대하여 考察하였다.

  • PDF

국내 주요 정수장의 과불화화합물 분포 및 위해성 평가 (Distribution and Risk Assessment of Perfluorinated Compounds (PFCs) in Major Drinking Water Treatment Plants, Korea)

  • 손보영;이이내;양미희;박상민;표희수;이원석;박주현
    • 상하수도학회지
    • /
    • 제31권6호
    • /
    • pp.491-499
    • /
    • 2017
  • The chemical structures of perfluorinated compounds(PFCs) have unique properties such as thermal and chemical stability that make them useful components in a wide variety of consumer and industrial products. Two of these PFCs, perfluorooctane sulfonate(PFOS) and perfluorooctanoic acid(PFOA), have received attention and were the most commonly detected. In this study it was analyzed the concentrations of 8 PFCs in samples were collected from drinking water treatment plants for 5 years(2012-2016). PFOS and PFOA were also high concentration and frequency. The mean concentrations of PFOA and PFOS were detected $0.0026-0.0069{\mu}g/L$ and $0.0009-0.0024{\mu}g/L$ in samples from drinking water treatment plants. These were relatively lower or similar compared to PFOS concentrations in Osaka(Japan). In general, these levels are below health-based values set by international authoritative bodies for drinking water. These results will be serve as the first monitoring data for PFCs in drinking water and be useful for characterizing the concentration distribution and management of PFCs in future studies.

국내의 조리 식품 중 과불화화합물의 잔류 수준 (Levels of perfluorinated compounds in prepared foods in Korea)

  • 신재호;고영림;박나연;방선아;임초롱;김판기;김정환
    • 한국식품과학회지
    • /
    • 제48권6호
    • /
    • pp.555-559
    • /
    • 2016
  • 국내에서 유통되는 조리식품 6종류, 151점의 시료를 수집하여 LC-MS/MS를 이용해 PFCs 잔류 수준을 측정하였다. 총 12종의 PFCs를 분석하였으며, PFBS를 제외한 PFCs의 회수율은 82.2-119.4%였으며, 정밀도는 2.2-28.9%였다. PFCs물질별로는 PFPeA (84.1%)와 PFOA (82.8%) 검출률이 높았고, PFOS의 검출률은 29.1%였으며, 대부분의 시료에서 PFOA가 PFOS보다 잔류 수준이 높은 경향을 보였다. 시료의 총 PFCs의 평균 농도는 $1.68{\pm}1.79ng/g$이었으며, PFPeA와 PFOA의 비중이 높았다.