Article
  • Flocculating Behavior of Chitosan in MB-SDS System
  • Kim SH, Na JW, Choi HK, Song KD
  • MB-SDS계내에서 키토산의 응집거동에 관한 연구
  • 김성현, 나재운, 최형기, 송기동
Abstract
Chitin was obtained from crab shell by Wolfrom's method and chitosan was deacethylated from chitin. The interaction of MB-chitosan and MB-chitosan-SDS system was examined by means of spectrophotometer. The flocculation effect of pH and removal rate of suspended solid (SS) was studied. With increasing the concentration of chitosan in MB-chitosan system, the disassociation occurred by means of increasing absorbance of monomer. When [SDS] ≤ 1 mM, the absorbance of MB-chitosan-SDS system decreased more than that of MB-SDS system. It promoted greatly the aggregation of polymer. The differential absorbance between MB-chitosan-SDS and MB-SDS system increased greatly at 30% isopropyl alcohol, 30% ethyl alcohol and 40% ethylene glycohol. When the concentration of chitosan increases twice, the removal rate of SS was doubled. The removal rate of SS had the high flocculation at pH 6∼9, but at above than pH 12 it had the low flocculation. It was reduced in HB-chliosan-SDS system with organic solvent.

Wolfrom법에 의해 게껍질로부터 얻은 키틴을 탈아세틸화시켜 키토산을 제조하였다. Methylene blue (MB)-키토산계 및 MB-sodium dodecyl sulfate (SDS)계의 상호작용에 있어서 키토산의 첨가효과를 분광학적으로 고찰하였고, 이들 계에 있어서 pH 및 부유물질 (SS)의 제거율 등 응집효과에 대해 검토해 보았다. MB-키토산계내에서 키토산의 농도가 증가함에 따라 단위체의 흡광도의 증가로 회합이 일어나지 않음을 알 수 있었다. 그러나 SDS≤1 mM에서는 키토산을 첨가한 MB-키토산-SDS계의 흡광도가 MB-SDS계보다 더 감소하므로써 다분자 회합체의 회합이 더욱 촉진됨을 알 수 있었다. 그리고 MB-키토산-SDS계와 MB-SDS계 사이의 흡광도차를 보면, isopropyl alcohol과 ethyl alcohol은 약 30% 그리고 ethylene glycohol은 약 40%에서 흡광도차가 가장 크게 증가하였다. 한편, 응집효과에서 키토산의 농도를 2배로 증가하면, SS 제거율은 약 2배로 증가하였다. 그리고 pH 6∼9에서 SS 제거율이 가장 좋은 응집효과를 가지는 반면, pH 12 이상에서는 가장 낮은 응집효과를 가졌다. 또한, MB-키토산-SDS계에 첨가한 유기용매는 흡광도차가 가장 큰 농도에서 SS 제거율이 현저히 감소됨을 알 수 있었다.

Keywords: chitosan; MB-SDS system; MB-chitosan-SDS system; flocculation effect; metachromasy

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1996; 20(5): 902-909

    Published online Sep 25, 1996