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2020 Vol.52, Issue 3 Preview Page
Comparison of Fibrillation Characteristics of Unbleached Kraft Pulp and Organosolv Pulp by Alkali Kneading Process

미표백 크라프트 펄프 및 유기용매 펄프의 알칼리 니딩 처리에 의한 미세섬유화 특성 비교

Sa Rang Choi1
,
Jung Myoung Lee2†
최사랑 1
,
이중명 2†
1Department of Wood Science and Technology, Kyungpook Natl. Univ.
2Major in Wood Science and Technology, Dept. of Wood Science and Technology, School of Forestry, Science and Landscape Architecture & Agricultural Science and Technology Research Institute, Kyungpook Natl. Univ.
1경북대학교 임산공학과, 학생
2경북대학교 산림과학·조경학부 임산공학전공 및 농업과학기술연구소, 교수
†Corresponding author: E-Mail: jmylee@knu.ac.kr (Address: Major in Wood Science and Technology, Dept. of Wood Science and Technology, School of Forestry, Science and Landscape Architecture, Kyungpook Natl. Univ., Daegu, 41566, Republic of Korea)
30 June 2020. pp. 50-57
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Abstract

This study evaluated the effects of the operating parameters on the fibrillation of the pulp during the kneading process. The effects examined two types of pulp and different pulp concentrations during the kneading with a fixed pulp volume concentration (PVC). Unbleached kraft pulp and organosolv pulp were first treated at different pulp concentrations (5.0%, 7.5%, and 10.0%) and then the morphological and physical characteristics of the treated fibers were compared and analyzed. Optical microscopy, Kajaani fiber analysis, particle size analysis, freeness, and the water retention value (WRV) showed that the alkali kneading accelerated the micronization and fibrillation of both types of pulp. These results also showed that the organosolv pulp was more effective in size reduction and hydration ability than unbleached kraft pulp. In addition, the higher pulp concentration of organosolv pulp significantly increased the fibril contents for a fixed kneading time, suggesting that the alkali kneading process of the organosolv pulp can be a potential precursor for lignin-rich microfibrillated cellulose and cellulose nanofibrils.

Keywords
Organosolv pulp
kneading
water retention value
freeness
lignin-rich microfibrillated cellulose
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 : 52
  • No :3
  • Pages :50-57
  • Received Date : 2020-05-04
  • Revised Date : 2020-05-20
  • Accepted Date : 2020-05-22
  • DOI :https://doi.org/10.7584/JKTAPPI.2020.06.52.3.50
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