Preparation of Hydrophobized Cellulose Nanofibril Film with High Strength Using AKD

Sooim Goo; Hyeonji Park; Simyub Yook; Shin Young Park; Hye Jung Youn

doi:10.7584/JKTAPPI.2018.12.50.6.34

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Preparation of Hydrophobized Cellulose Nanofibril Film with High Strength Using AKD AKD를 이용한 고강도 소수성 셀룰로오스 나노피브릴 필름 제조

30 December 2018. pp. 34-41

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Abstract

Cellulose nanofibrils (CNF) is expected to have a great potential because it has high aspect ratio, mechanical strength and biodegradability. In addition, it is easy to make film using CNF, which shows good strength, optical transparency, and barrier properties. However, it is necessary to be hydrophobized because hydrophilicity attributed to the hydroxyl groups of cellulose fiber limits the application of CNF film to various fields including packaging area. In this study, alkyl ketene dimer (AKD) was selected as a hydrophobization agent since it is easy to react with CNF in the aqueous system. During the preparation of hydrophobized CNF film, process conditions have a considerable effect on the CNF film properties including hydrophobicity. The CNF film was prepared by two methods: internal treatment and immersion. The latter method showed a greater effect on the increase of hydrophobicity of the CNF film compared to the former method. In addition, the mechanical and optical features of the hydrophobized CNF film were evaluated. The film made by immersion showed higher tensile strength and light transmittance than the film made by internal treatment. Therefore, hydrophobized CNF film with high strength could be prepared by immersion of untreated CNF film into AKD emulsion.

Keywords

Cellulose nanofibrils

film

hydrophobization

alkyl ketene dimer

immersion

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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 :6
Pages :34-41
Received Date : 2018-11-14
Revised Date : 2018-11-29
Accepted Date : 2018-12-03
DOI :https://doi.org/10.7584/JKTAPPI.2018.12.50.6.34

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited