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2016 Vol.48, Issue 3 Preview Page
Effects of Alkali Concentration on Fiber Characteristics of SwBKP during Alkali Treatment in Cosolvent System

알칼리 공용매 팽윤처리 시 알칼리 농도가 SwBKP 섬유 특성에 미치는 영향

Ji-Hye Seo
,
Kyoung-Hwa Choi‡1
,
Byoung-Uk Cho†
서지혜
,
최경화 ‡1
,
조병욱 †
•Dept. of Paper Science & Engineering, College of Forest and Environmental Science, Kangwon National University, Chunchon, 24341
1Changgang Institute of Paper Science and Technology, Kangwon National University, Chunchon
•강원대학교 산림환경과학대학 제지공학과
1강원대학교 창강제지기술연구소
†E-mail: bucho@kangwon.ac.kr
‡E-mail: bleaching@kangwon.ac.kr
30 June 2016. pp. 37-43
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Abstract

Various mechanical and chemical pretreatment methods including alkali treatment, pre-beating, enzyme treatment and oxidation treatment have been used to reduce the production energy of the microfibrillated cellulose (MFC). Among them, alkali swelling can be helpful to reduce the energy consumption because the internal bonding between fibrils could be weakened. In this study, dimethyl sulfoxide (DMSO) was used as a cosolvent to improve alkali pretreatment efficiency and the effects of NaOH concentration during NaOH-DMSO swelling on changes in fiber characteristics of softwood bleached kraft pulp (SwBKP) were elucidated. For alkali treatment in H2O-DMSO solvents, fiber length were decreased with increasing NaOH concentration while fiber width, curl and WRV were increased. WRV began to increase at 8% NaOH solution. In addition, above 8% concentration of NaOH, crystalline structure of pulp fibers converted from cellulose II to cellulose III by DMSO cosolvent. Comparing the previous results with this study, it was shown that DMSO cosolvent could promote swelling of pulp fibers and thus reduce NaOH concentration for the maximum swelling of fibers.

Keywords
Alkali swelling
cosolvent
DMSO
fiber characteristics
crystallinity
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 48
  • No :3
  • Pages :37-43
  • Received Date : 2016-05-23
  • Revised Date : 2016-06-13
  • Accepted Date : 2016-06-15
  • DOI :https://doi.org/10.7584/ktappi.2016.48.3.037
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