• 제목/요약/키워드: Saponification

검색결과 190건 처리시간 0.028초

폴리비닐알코올/키토산 블렌드 필름의 제조 및 그 특성에 관한 연구 (A Study on the Preparation and Properties of Poly(vinyl alcohol)/Chitosan Blend Films)

  • Jeong, Min-Gi;Son, Tae-Won;Kim, Young-Hun;Cho, Jin-Won;Kim, Dae-Sun
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 봄 학술발표회 논문집
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    • pp.321-322
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    • 2003
  • Poly(vinyl alcohol) (PVA) is a polymeric biomaterial that obtained by the saponification of poly(vinyl acetate) (PVAc). It has a nontoxic and water-soluble synthetic polymer, and has excellent biodegradability, biocompatibility, ability of film forming, and hydrophilic property, which is widely used in biochemical and biomedical applications.$\^$1)/ Chitosan is one of a few natural cationic polysaccharides that can be obtaiend by alkaline deacetylation of chitin which is the second most abundant polymeric material in the earth.$\^$2)/ (omitted)

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고분자량 혼성배열 폴리비닐알코올/염료 복합체 필름의 제조 (Preparation of High Molecular Weight Atactic Poly(vinyl alcohol)/Dye Complex Film)

  • Park, Joo-Min;Kim, Sam-Soo;Lyoo, Won-Seok
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 봄 학술발표회 논문집
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    • pp.48-51
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    • 2003
  • Poly(vinyl alcohol) (PVA) obtained by the saponification of poly(vinyl ester) like poly(vinyl acetate) or poly(vinyl pivalate) is a linen. semicrystalline polymer, which have been widely used as fibers for clothes and industries, films, membranes, medicines for drug delivery system, and cancer cell-killing embolic materials[1-3]. PVA fibers and films have high tensile and compressive strengths, high tensile modulus, and good abrasion resistance due to its highest crystalline lattice modulus. (omitted)

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Lithium Dual Complex 그리이스의 합성 및 특성연구 (Synthesis and Characterization of Lithium Dual Complex Grease)

  • 최웅수;권오관;문탁진;유영홍
    • Tribology and Lubricants
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    • 제1권1호
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    • pp.80-87
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    • 1985
  • 고온에서 화학적역안정성 및 기계적안정성의 섬유구조를 갖기 위해 lithim complex gellant로 정한 지방산과 $LiOH\cdot H_2O$ 및 boric acid의 이차연속검화반응으로 lithium dual complex 그리이스를 합성하였다. complex gellant의 양은 14%(NLGI 2호)가 적정량이었으며, 특히 castor wax를 1.5% 첨가했을때 이상적인 성능을 나타냈다. 이렇게 합성한 그리이스의 유분리성, 산화안정성, 내수성, 혼화안정성, 극압 및 내마모성은 ASTM 및 KS 방법에 준해 시험하였으며, 매우 우수한 특성을 지녔음을 알았다.

피발산비닐과 아세트산비닐의 테트라히드로푸란계 용액공중합에 의한 수용성 저분자량 교대배열 폴리비닐알코올의 제조 (Preparation of Water-Soluble Syndiotacticity-Rich Low Molecular Weight Poly(vinyl alcohol) by Solution Copolymerization of Vinyl Pivalate/Vinyl Acetate in Tetrahydrofuran and Saponification)

  • Lyo, Won-Seok;Yeum, Jeong-Hyun;Ji, Byung-Chul
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2002년도 봄 학술발표회 논문집
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    • pp.187-190
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    • 2002
  • Poly(vinyl alcohol) (PVA) is a representative hydrophilic and water-soluble polymer and widely employed in various applications such as fibers for clothes and industries, films, membranes, medicines for drug delivery system, and cancer cell-killing embolic materials. Moreover, PVA fibers, gels, and films are potentially high-performance materials because they have high tensile and impact strengths, high tensile modulus, high abrasion resistance, excellent alkali resistance, and oxygen barrier property which are superior to those of any known polymers[1,2]. (omitted)

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BTCA에 의한 실크/면 교직물의 DP 가공(2) - HPLC에 의한 BTCA 처리 실크/면 교직물의 물리적 특성 평가 - (Durable Press Finishing of Silk/Cotton Fabrics with BTCA(2) - The Evaluation of Physical Properties of Silk/Cotton Fabrics Treated with BTCA by HPLC Analysis -)

  • 조석현;이문철
    • 한국염색가공학회지
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    • 제14권3호
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    • pp.19-25
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    • 2002
  • Silk/cotton fabrics were treated with butanetetracarboxylic acid(BTCA) under various treating conditions such as concentration, treated time and curing temperatures. Bending property, tensile strength, wrinkle recovery angle, and shrinkage were measured. The BTCA concentration in the saponfication mixture was measured by an isocratic HPLC equipped with the strong cationic exchange column Aminex HPX-87-H and a UV detector. The detected concentration of BTCA was shown in silk side much more than that of cotton side. The bending and shrinkage properties were improved at minimum curing condition and the lower concentration of BTCA. Tensile strength decreased with increasing concentration of BTCA, curing temperature and treated time, while wrinkle recovery angle increased.

셀룰로오스를 이용한 마이크로 몰드 및 나노섬유 제작 (Fabrication of the micro-mold and nanofiber using cellulose solution)

  • 조기연;임현규;강광선;김재환
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 추계학술대회논문집
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    • pp.69-72
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    • 2007
  • Cellulose is a beneficial material that has low cost, lightweight, high compatibility and biodegradability. Recently electroactive paper (EAPap) on cellulose base was discovered as a smart material and actuator through ion migration and piezoelectric effect. Furthermore cellulose has a potentiality to apply the display material, because of its high reflectivity, flexibility and high transmittance. The various shapes and height patterns of the Cellulose acetate (CA) solution, such as circle and honeycomb patterns, were fabricated and observed by field emission scanning electron microscope (FESEM, S4300 Hitachi). The resulting pattern showed uniform size in the large area without defect. After stretching the CA film with saponification process in the sodium methoxide in methanol solution, Most of the compositions become one directional ordered nanofibers below 50nm.

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기능성 microsphere의 개발(II) - EVA Microsphere의 표면개질과 특성 - (Development of Functional Microsphere( II ) - Surface Modification and Properties of EVA Microsphere -)

  • 김혜인;박형섭;박수민
    • 한국염색가공학회지
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    • 제17권3호
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    • pp.26-33
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    • 2005
  • EVA microsphere was prepared by a thermally induced phase separation. EVAL microsphere was made by a saponification on sheath of EVA microsphere. And microcapsule with EVA core-PU shell structure was synthesized by interfacial polymerization using diisocyanates with PEG in gelatin aqueous solution as the stabilizing agent. The effects of chemical structure of diisocyanate on the average particle size and distribution, morphology, color strength and friction fastness of core-shell particles were investigated to design microcapsule. The friction fastness of the fabrics printed with EVA core-PU shell microcapsules had the 4-5 grade.

포도씨의 지방질 조성과 이화학적 특성 (Lipid Componant and Properties of Grape Seed Oils)

  • 강한철
    • 한국식품영양학회지
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    • 제12권2호
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    • pp.150-155
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    • 1999
  • The possibility of grape seeds as industrial resources was tested by analyzing various chemical proper-ties of their oils from seven different species. The range of crude oil content of the grape seeds was 26.0-32.0% showing the highest content in Steuden, Mean individual fatty acid contents in the grape seeds were lioleic (70.75%) oleic (18.48%) stearic (2.01%) and palmitic (8.45%) acids. Stearic acid was low in Jingyu and high oleic acid was found in Fugiminori compared with other grape strains. Total lipirds were consisted of nutral lipid (87.25%) glycolipid(4.68%) and phospholipid *8.06%) Content of crude proteins was approximatery 11.2% with some variation between strains. Total sugar content was 2.35~5.63$\mu$g/mg with reducing sugar 3.20$\mu$g/mg. Mean saponification value of crude oils was 186.3mg.KOH.oil Antioxidant activity of grape seed oils was better than that of sesame oil resulting in the hi-oils and sesame oil after heat treatment at 18$0^{\circ}C$.

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고농도 폴리비닐 알코올/디메틸 설폭사이드 용액의 유변학적 특성의 시간의존성 (Time-Dependence of the Rheological Properties of Concentrated PVA Solution in DMSO)

  • 김남희
    • 유변학
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    • 제9권3호
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    • pp.118-123
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    • 1997
  • 검화도와 분자량이 상이한 폴리비닐 알코올을 디멜틸 설폭사이드에 녹여 폴리비닐 알코올/디멜틸 설폭사이드 용액을 준비하고 동적 유변학적 특성에 대한 시간과 온도 의존성 을 고찰하였다. 고농도 폴리비닐 알코올 용액의 유변학적 특성은 시간 의존성을 보여주었다. 복합점도와 저장탄성률은 시간에 따라 증가하였다. 또한 저장 탄성률과 손실탄성률의 그래 프에서 저장탄성률은 신간에 따라 증가하였으나 기울기는 시간에 따라 증가하였다. 또한 저 장탄성률과 손실탄성률의 그래프에서 저장탄성률은 시간에따라 증가하였으나 기울기는 시간 에 따라 감소하였다. 유변학적 특성의 시간 의존성은 분자량이 높을수록, 측정온도가 높을수 록 더 두드러지게 나타났다.

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