• Title/Summary/Keyword: Membrane Characterization

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Preparation and Characterization of Chitosan Membranes Cross-linked Using Poly(2,6-dimethyl-1,4-phenylene oxide) Polymer and Chitosan (Poly(2,6-dimethyl-1,4-phenylene oxide) 고분자와 키토산을 이용한 가교막 제조 및 특성평가)

  • Son, Tae Yang;Ko, Tae Ho;Jung, Ji Hye;Hong, Jun Ui;Nam, Sang Yong
    • Membrane Journal
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    • v.28 no.3
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    • pp.205-213
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    • 2018

  • In this study, cross-linked membrane were successfully prepared by using brominated PPO (Br-PPO) as the main polymer chain. Chitosan and quaternary ammonium modified chitosan (QA-chitosan) was used as the cross linking agents. The cross linked membranes were post-functionalized by using trimethylamine solution. The degree of cross linking was also controlled by varying the ratio of cross linking agent. The applicability of the cross-linked membrane (A-PPO + chitosan, A-PPO + QA-chitosan) as ion exchange membranes was verified through various characterization techniques. The cross-linked membrane using QA-chitosan as cross linking agent was found to be better in performance than the membrane using pristine chitosan cross linking agent. As the percentage of QA-chitosan increased, the ion exchange capacity from 1.18 meq/g to 1.53 meq/g and water uptake from 21.6% to 42.2% was improved.

  • https://doi.org/10.14579/MEMBRANE_JOURNAL.2018.28.3.205 인용 PDF KSCI

Membrane Topology of the Integral Membrane Transporter for Ribose

  • Park, Yongkyu;Park, Chankyu
    • Proceedings of the Korean Biophysical Society Conference
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    • 1998.06a
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    • pp.28-28
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    • 1998

  • RbsC of Escherichia coli is the integral membrane component of the high-affinity ribose transport system classified as the AraH family. To understand the function and structure of RbsC, the topology of RbsC was investigated by alkaline phosphatase fusion. Characterization of a total of 64 RbsC-PhoA fusions revealed that RbsC is composed of six transmembrane helixes and has three periplasmic and two cytoplasmic loops.(omitted)

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Characterization of membrane pore size based on the liquid displacement method (Liquid displacement method에 의한 막의 기공 크기 특성화)

  • 원종옥;박현채;강용수;백창근;민병렬
    • Proceedings of the Membrane Society of Korea Conference
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    • 1998.04a
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    • pp.62-64
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    • 1998

  • 1. 서론 및 이론적 배경 : 분리막 기술은 다양한 산업분야에서 광범위하게 사용되어지고 있는데 대부분 비대칭형 구조를 지닌 다공막이다. 이 경우 막의 표면에 존재하는 기공의 크기 및 크기 분포가 분리막의 성능을 결정하게 된다. 분리막 표면의 active pore 크기 및 크기 분포를 측정하기 위하여 liquid displacement방법이 많이 사용되고 있다. (생략)

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