Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Hemicellulose Removal and Crystalline Structure Transition of Flax Fiber with Alkali Treatment

알칼리 처리에 따른 아마섬유의 헤미셀룰로스 제거와 결정구조 전이

  • Um, In Chul (Department of Bio-fibers and Materials Science, Kyungpook National University) ;
  • Kweon, Hae Yong (Department of Agricultural Biology, National Academy of Agricultural Science) ;
  • Park, Young Hwan (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University)
  • 엄인철 (경북대학교 바이오섬유소재학과) ;
  • 권해용 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 박영환 (서울대학교 바이오시스템소재학부)
  • Received : 2012.08.07
  • Accepted : 2012.08.31
  • Published : 2012.10.31
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Abstract

In this study, delignified flax fiber was treated with a NaOH aqueous solution. XRD diffractometry and FTIR spectroscopy were utilized to examine the structural transition of the alkali-treated flax fibers. Also, the effect of the hemicellulose removal on the structural change of flax fibers was discussed. XRD measurement revealed that the crystallinity of cellulose I increased at low NaOH concentration (3%) due to the elimination of amorphous hemicellulose. The structural transition from cellulose I to cellulose II occurred in a NaOH concentration range of 12~15%. Considering most hemicellulose in flax fiber is removed at 12% NaOH, it can be assumed that the presence of hemicellulose in flax fiber has a role in preventing the structural change of flax cellulose. IR absorbance ratios ($A_{1370cm}{^{-1}}/A_{2900cm}{^{-1}}$ and $A_{1430cm}{^{-1}}/A_{2900cm}{^{-1}}$) were utilized as a barometer of cellulose I crystalline exhibiting a similar result with the cellulose I crystallinity from XRD. Another absorbance ratio ($A_{895cm}{^{-1}}/A_{2900cm}{^{-1}}$) reflected the cellulose II crystalline showing almost the same trend as cellulose II crystallinity. On the whole, the total crystallinity of flax fiber was increased at low NaOH concentration (3%) and decreased at 12% due to the reduction of cellulose I content and increased again at 15% attributed to the formation of cellulose II content.

Keywords

Acknowledgement

Supported by : 한국연구재단

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