Environment-Friendly Non-Sulfur Cooking and Totally ChlorineFree Bleaching for Preparation of Sugarcane Bagasse Cellulose

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  • Maryana Roni
    Graduate School of Life and Environmental Sciences, University of Tsukuba Research Unit for Natural Product Technology, Indonesian Institute of Sciences
  • Nakagawa-izumi Akiko
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • Kajiyama Mikio
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • Ohi Hiroshi
    Graduate School of Life and Environmental Sciences, University of Tsukuba

説明

<p>This study focuses on improving the quality of dissolving pulp (DP) from sugarcane bagasse (SB) prepared by a non-sulfur cooking method and totally chlorine-free (TCF) bleaching sequences. First, the effects of prehydrolysis and soda-anthraquinone (AQ) cooking conditions on brightness and viscosity were studied. Second, a novel five-stage TCF bleaching sequence, which employs oxygen (O) bleaching,peroxymonosulfuric acid (Psa) treatment and alkali extraction with hydrogen peroxide (Ep) in the sequence OPsa-Ep-Psa-Ep was applied to SB pulps. The maximum brightness and viscosity of unbleached pulp were 46.3% ISO and 34.1 cP, respectively, whereas after the final bleaching stage, the maximum qualities (brightness: 89.1% ISO, viscosity: 6.4 cP, glucan content: 95.7%, and ash content: 0.12%) met the standard requirements. For comparison, the effects of TCF bleaching on oil palm empty fruit bunch pulp were investigated. The proposed TCF bleaching shows a potential as a bleaching method to produce high-quality DP from SB.</p>

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