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2021 Vol.53, Issue 5
Combined Enzymatic Pretreatment of Pulp for Production of CNF
Shin Young Park1
,
Seokho Lee12
,
Wanhee Im13
,
Hak Lae Lee45
,
Hye Jung Youn45†
1Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Graduate Student
2Current Address: R&D Center, Kleannara, Cheongju-Si, Chungcheongbuk-do 28174, Researcher
3Current Address: Moorim P&P Co. Ltd., Ulsan 45011, Senior Researcher
4Department of Agriculture, Forestry and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Professor
5Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Professor
†Corresponding author: E-Mail: page94@snu.ac.kr (Address: Department of Agriculture, Forestry and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea)
30 October 2021. pp. 5-15
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Abstract

In this study, the effects of mixing treatment of endoglucanase and xylanase on characteristics of pulp and cellulose nanofibrils (CNF) were investigated. The degree of polymerization of the pulp was reduced and its crystallinity was increased after enzymatic pretreatment. The suspension viscosity of CNF prepared from enzymatic pretreated pulps was lower than that of untreated CNF. Compared with untreated CNF, more uniform and smaller fibrils could be obtained through combined pretreatment of endoglucanase and xylanase, but higher endoglucanase dosage led to wider fibrils width distribution. The aspect ratio of enzyme-treated CNF was lower than that of untreated CNF. The use of both endoglucanase and xylanase increased the tensile strength and elastic modulus of the sheet, whereas just endoglucanase-treated CNF sheet exhibited lower strength. The light transmittances of each CNF sheet were comparable; however, the casted sheet made using 1.0% endoglucanase-treated CNF was less transparent because of its morphological features. The combined use of endoglucanase and xylanase could facilitate the nanofibrillation and produce the sheet without any deterioration of strength.

Keywords
Cellulose nanofibrils
enzyme
pretreatment
tensile strength
transparent film
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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 : 53
  • No :5
  • Pages :5-15
  • Received Date : 2021-08-17
  • Revised Date : 2021-09-16
  • Accepted Date : 2021-09-23
  • DOI :https://doi.org/10.7584/JKTAPPI.2021.10.53.5.5
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