http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
용액블랜딩법에 의한 PVA-Algin 블랜드필름의 분해
김용렬(Yong Yeul Kim),이기창(Ki Chang Lee),황성규(Sung Kwy Hwang),오세영(Se Young Oh),정덕채(Duck Chea Jung) 한국환경보건학회 1998 한국환경보건학회지 Vol.24 No.4
PVA is useful for the production of water-soluble packaging, paper, textile sizes. Algin is known as natural polymer from marine plants. Algin was blended with PV A in different ratios by solution blending technique to give degradability polymer. Miscibility behavior between PVA and Algin has been studied with DSC and morphological changes by SEM. PVA/Algin blend films were observed to be partially miscible by DSC and SEM. As a result, Blend films were completely degraded with the passage of time in the buff er solution of pH. With β-glucosidase, the rate of degradation of blend films were rapidly better than pH solution by enzymosis.
아민 추출제에 의한 유기산의 반응추출 Ⅱ - Lewis Stirred Cell 추출기를 이용한 반응추출제에 의한 유기산의 물질이동 -
류운형,이한섭,유철휘,김용렬,강안수 ( Oon Hyung Ryu,Han Seob Lee,Chul Hwi Yoo,Yong Yeul Kim,An Soo Kang ) 한국공업화학회 1995 공업화학 Vol.6 No.6
Lewis식 교반추출장치에서 물질전달계수에 미치는 교반속도의 영향 및 무차원군의 관계를 구명하였다. Lewis식 교반추출장치에서 교반속도가 커질수록 유기산의 수용액측 물질전달계수는 증가하였고 추출도 또한 증가하였다. 그리고 0.05M 메타아크릴산을 Trioctylamine으로 추출하는 경우에 최적조건은 교반속도 200rpm, 추출시간 50분이었으며, 이때 물질전달계수는 5.52×10^(-5)m/s이었다. 또한 추출속도에 대한 무차원 상관관계를 얻었으며 그 결과는 본 실험에 사용한 유기산 중에서 아크릴산의 경우 Sh=(Re·Sc)^(0.97), 메타아크릴산의 경우 Sh=(Re·Sc)^(0.68)에 각각 비례하였다. 이때 이들의 상관식은 15% 이내의 오차 범위에서 일치하였다. The mass transfer coefficient of organic acid in aqueous phase and the degree of extraction were increased with increasing agitation speed in Lewis stirred cell extraction unit. The optimum conditions of agitation speed and the extraction time were 200rpm and 50min respectively for the case of 0.05M methacrylic acid extraction with trioctylamine, and in these conditions, the mass transfer coefficient was 5.52×10^(-5)m/s. Correlations of dimensionless group for extraction rate were obtained, such that Sh is proportional to (Re·Sc)^(0.97) in acrylic acid, and Sh is proportional to (Re·Sc)^(0.68) in methacrylic acid. Also, calculated values by using these correlation eqations were consistent within 15% error range with experimental ones.
아민 추출제에 의한 유기산의 반응추출 (Ⅰ) ( 유기산의 반응추출시 추출도에 미치는 추출제 및 용매의 영향에 관한 연구 )
류운형,이한섭,유철휘,김용렬,강안수 ( Oon Hyung Ryu,Han Seob Lee,Chul Hwi Yoo,Yong Yeul Kim,An Soo Kang ) 한국공업화학회 1996 공업화학 Vol.7 No.1
평형 추출장치를 사용하여 유기산의 물리추출과 반응추출에서 추출도에 미치는 추출제의 종류와 농도, 용매의 영향을 조사하였다. 사용된 유기산은 아크릴산과 메타크릴산이었고, 추출제로는 n-octylamine(OA)과 di-n-octylamine(DOA), tri-n-octylamine(TOA) 및 tri-octylmetyl ammonium chloride(TOMAC; Aliquat 336)을 사용하였다. 실험결과 반응추출에서 추출도는 물리추출의 경우보다 2∼9배 정도 증가 되었으며, 유기산의 추출도에 미치는 추출제의 영향은 OA, TOMAC, DOA 및 TOA의 순서로 추출도가 증가하였으며, 또한 추출제의 농도가 증가할수록 추출도가 증가하였다. 용매의 영향은 종래의 용매의 유전상수보다는 용해도인자에 의한 용매선택 방법이 신뢰성이 있었고, 용질과 용매의 용해도인자의 차이가 작을수록 추출도가 증가하여 케로진, 크실렌, 클로로포롬, MIBK 및 n-BAc의 순서로 좋아졌다. In physical and reactive extraction system using equilibrium extraction equipment, the effects of extractants, concentration of extractant, and solvent on the degree of extraction were investigated. The organic acids used were acrylic acid and metacrylic acid. Extractants were n-octylamine(OA), di-n-octylamine(DOA), tri-n-octylamine(TOA) and tri-octylmetyl ammonium chloride(TOMAC; Aliquat 336). We found that the degree of extraction for reactive extraction was 2∼9 times than that for physical extraction and that effect of extractants on the degree of extraction of organic acid was the order of OA<TOMAC<DOA<TOA. And the degree of extraction was increased with increasing the concentration of extractants. In solvent effect, solubility parameter was more effective than dielectric constant of solvent, and the degree of extraction increased as the difference of solubility parameter of solvent and solute decreased, therefore the order was kerosine<xylene<chloroform<MIBK<n-BAc.
김경민(Kyung Min Kim),공승대(Seung Dae Kong),윤철훈(Cheol Hun Yoon),김용렬(Yong Yeul Kim),이한섭(Han Seob Lee) 한국유화학회 2000 한국응용과학기술학회지 Vol.17 No.3
PVA blend films were prepared by solution blending method for the purpose of useful antibiotic polymers. Characteristics properties of blending films such as elongation and tensile strength were determined. Tensile strength and elongation were rapidly reduced as increasing the blending ratio of natural polymer. Blend films were found that phase separation was occured as more than 25wt% increasing the blend ratio of chitosan. Also, The antibiotics of blend films were examined against gram(+) and gram(-) by disk susceptibility test. As a result, kind of blending films to show the highest antibiotics was chitosan 20wt% and the selectivity of mold strain was observed.
PVA 와 Algin 의 블렌딩에 따른 특성과 토양분해
조형재(Hyung Jae Cho),오세영(Se Young Oh),이기창(Ki Chang Lee),정덕채(Duck Chea Jung),김용렬(Yong Yeul Kim),황성희(Seong Hee Hwang) 한국유화학회 1999 한국응용과학기술학회지 Vol.16 No.1
N/A Algin is known as biodegradable natural polymer from marine plants. PVA/Algin blend films were prepared by solution blending method for the purpose of useful biodegradable polymer. Characteristics properties of PVA/Algin blend films such as DSC, Elongation, Tensile strength and Morphological change by SEM were ratio of Algin. PVA/Algin blend films were found that phase separation was occured as more than 25wt% increasing the blend ratio of Algin. Blend films were observed to be less partially compatibility than 10wt% increasing the blend ratio of Algin by DSC, mechanical properties and SEM. Also, PVA/Algin blend films at the laboratory soil test(Pot Test) were completely degraded in months with four kinds of soils by microorganisms.