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2022 Vol.54, Issue 2 Preview Page
Evaluation of Hydrophobicization of Cationic Cellulose Nanofibers Depending on the Type of Rosin Sizing Agents

로진사이즈제 종류에 따른 양이온성 셀룰로오스 나노섬유의 소수화 평가

Do Hoon Kim1
,
Hae Min Jo1
,
Soo Hyun Lee1
,
Ji Young Lee2†
김도훈 1
,
조해민 1
,
이수현 1
,
이지영 2†
1Department of Forest Products, Gyeongsang National University
2Department of Environmental Materials Science/IALS, Gyeongsang National University
1경상국립대학교 임산공학과, 학생
2경상국립대학교 환경재료과학과/농업생명과학연구원, 교수
†Corresponding author: E-Mail: paperyjy@gnu.ac.kr (Address: Department of Environmental Materials Science, Gyeongsang National University, Jinju, 52828, Republic of Korea)
30 April 2022. pp. 51-57
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Abstract

In this study, we evaluated the hydrophobicization of cationic cellulose nanofibers (CNFs) for different types of rosin sizing agents. Bleached hardwood kraft pulp was treated with microgrinding to prepare anionic CNF, and then cationic CNF was made from anionic CNF via a quaternization reaction. Thereafter, the particle size, fiber width, and zeta-potential of anionic and cationic CNFs were measured. The CNF films were prepared by adding rosin sizing agents to anionic and cationic CNF slurries. The contact angles of the CNF films for different rosin sizing agents and heat treatment were measured to evaluate the hydrophobicity of CNFs. The anionic and cationic CNFs were considerably nanosized showing no considerable difference in size, but the electrostatic properties were opposite to each other. Both the rosin sizing agents had a negative zeta-potential, and the fortified rosin sizing agent had a stronger anionic zeta-potential than gum rosin sizing agent. As the anionic and cationic CNF films containing rosin sizing agents were thermally cured, the contact angle of the CNF films increased and the cationic CNF film showed a higher contact angle than the anionic CNF film. Moreover, the fortified rosin sizing agent exhibited a higher contact angle of the cationic CNF film than the gum rosin sizing agent. In conclusion, the fortified rosin sizing agent was more effective in improving the hydrophobicity of the cationic CNF film than the gum rosin sizing agent.

Keywords
Cationic cellulose nanofiber
quaternization
gum rosin sizing agent
fortified rosin sizing agent
contact angle
curing
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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 : 54
  • No :2
  • Pages :51-57
  • Received Date : 2022-04-13
  • Revised Date : 2022-04-20
  • Accepted Date : 2022-04-23
  • DOI :https://doi.org/10.7584/JKTAPPI.2022.04.54.2.51
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