Sintesis Mikrokapsul Kitosan Tersambung Silang K2S2O8 sebagai Adsorben Zat Warna Methyl Orange
Abstract
Modified chitosan into microcapsules that crosslinked with potassium peroxodisulfate (KPS) is intended to improve the quality, stability, durability and absorption of chitosan as an adsorbent. Microcapsules of chitosan that crosslinked were prepared using solvent evaporation method with 2 gram chitosan, coating material Carboxy Methyl Cellulose (CMC) that dissolved in acetone with mass variations and 200 ml crosslinking material KPS 2%. The dispersing medium used was mixture of 60 ml of liquid paraffin and 1.2 ml of tween 80. The solution was decanted using n-hexane to remove paraffin. The effectiveness of microcapsules of crosslinked chitosan as adsorbent was carried out on methyl orange dyes. The surface characteristics and morphology of modified chitosan were tested using FTIR and SEM. The results of the analysis showed that microcapsules of chitosan crossed KPS with 1 gram CMC coating relatively good increased deacetylation degree from 49.89% to 52.22%, had absorption capacity of 3.6415mg/g with 6 hours adsorption time. The diameter of chitosan microcapsules is around 1246 µm and there is a coating wall on the surface, thus increasing the resistance of chitosan.
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