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2018 Vol.50, Issue 4 Preview Page
Study on Surface Modification of Cellulose Nanofibril with Cationic Polyelectrolyte

양이온성 고분자전해질을 적용한 셀룰로오스 나노피브릴의 표면전처리 연구

Ji Young Lee
,
Tae Ung Park1
,
Hae Min Jo1
,
Kyung Min Kim1
,
Chul Hwan Kim†
이지영
,
박태웅 1
,
조해민 1
,
김경민 1
,
김철환 †
Dept. of Environmental Materials Science/IALS, Gyeongsang Natl. Univ., Jinju, 52828
1Dept. of Forest Products, Gyeongsang Natl. Univ., Jinju, 52828
경상대학교 환경재료과학과/농업생명과학연구원
1경상대학교 임산공학과
†Corresponding author: E-Mail: jameskim@gnu.ac.kr
30 August 2018. pp. 116-122
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Abstract

It is important to retain the surface charge of cellulose nanofibrils (CNFs) on the wet web when they are used as a dry strength agent in the papermaking process. CNFs typically contain negative charges due to the carboxylic acids on cellulose molecules. Surface modification of CNFs should therefore be carried out to improve the retention of CNFs. In this study, we treated the CNFs with polyethyleneimine (PEI), polydiallyldimethyl ammonium chloride (P-DADMAC), and cationic polyacrylamide (C-PAM), and the zeta potential of the CNFs was measured to identify surface modification. Subsequently, the handsheets were made using these pretreated CNFs and the strength of the handsheets was measured.

Charge reversion in the CNFs was observed as negative to positive zeta potential as the addition of polyelectrolytes increased, but the reversion points were different according to the type of polyelectrolyte used. C-PAM handsheets showed higher tensile strength and folding endurance than the other two polyelectrolytes. It was therefore concluded that C-PAM was the most effective polyelectrolyte for modifying the surface charge of CNFs when used as internal additive in the papermaking process.

Keywords
Cellulose nanofibril (CNF)
polyelectrolyte
surface modification
zeta potential
retention
strength
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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 : 50
  • No :4
  • Pages :116-122
  • Received Date : 2018-07-25
  • Revised Date : 2018-08-16
  • Accepted Date : 2018-08-17
  • DOI :https://doi.org/10.7584/JKTAPPI.2018.08.50.4.116
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