Pervaporation Separation of Isopropanol–Water Mixtures Using Crosslinked Chitosan Membranes

Authors

  • Mohd Ghazali Mohd Nawawi
  • Hashim Hassan

DOI:

https://doi.org/10.11113/jt.v39.441

Abstract

Membran kitosan telah dihasilkan daripada kulit udang tempatan. Membran kitosan yang dihasilkan adalah membran homogen (tanpa ubah suai) dan membran terangkai–silang (terubah suai). Darjah perangkaisilangan adalah ditentukan oleh masa rangkai–silang itu sendiri. Prestasi bagi membran yang dihasilkan tanpa ubah suai dan membran yang terubah suai telah dikaji dalam pemisahan penelapsejatan bagi sistem campuran air–isopropanol. Daripada ujikaji penelapsejatan, membran yang dihasilkan daripada kitosan telah memberikan keutamaan dalam penelapan kepada air. Membran terubah suai menunjukkan penurunan dalam fluks tetapi terdapat peningkatan dalam faktor pemisahan berbanding dengan membran tanpa ubah suai. Daripada segi indeks pemisahan penelapsejatan (PSI) pula didapati membran terubah suai telah menunjukkan prestasi yang lebih baik berbanding membran tanpa ubah suai. Kata kunci: penelapsejatan; kitosan; membran; terangkai-silang; campuran isopropanol-air Chitosan membranes were prepared from local shrimp shells. Membranes were prepared as homogeneous (unmodified) and crosslinked chitosan. Chitosan membranes were modified via chemical crosslinking technique. The extent of crosslinking were determined by its crosslinking time. The pervaporation performances of the unmodified and the modified chitosan membranes were investigated in the pervaporation isopropanol–water systems. From the pervaporation experiments, it showed that chitosan membranes exhibited preferential permeation to water. The modified chitosan membranes showed a lower permeation flux but a higher separation factor than the unmodified membranes. The modified chitosan membrane had a better pervaporation performance than the unmodified membranes in terms of pervaporation separation index. Key words: pervaporation; chitosan; membrane; crosslinking; isopropanol-water mixtures

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Published

2012-01-20

Issue

Section

Science and Engineering

How to Cite

Pervaporation Separation of Isopropanol–Water Mixtures Using Crosslinked Chitosan Membranes. (2012). Jurnal Teknologi (Sciences & Engineering), 39(1), 55–64. https://doi.org/10.11113/jt.v39.441