奈米纖維素作為包裝材料塗層之性質與應用

Properties and applications of nanocellulose as a coating for packaging materials

洪弼仲(Pi-Chung Hung)

指導教授 ： 柯淳涵

國立臺灣大學/生物資源暨農學院/森林環境暨資源學研究所/碩士(2021年)

https://doi.org/10.6342/NTU202104151

摘要

本研究以不同比例之奈米纖維材料(Cellulose nanofibrils, CNF和Cellulose nanocrystals, CNC)及其疏水化改質後之產物、奈米高嶺土(NC)、聚乙烯醇(PVA)及乙二醛(ED)配製成塗料。塗料性質顯示，纖維素粒徑較小者的屏障性能較佳，界面電位較高者，表示奈米纖維材料之懸浮程度越佳，且團聚現象降低。紙張性質顯示，纖維素含量在10~20%左右來到最佳，擁有最低的氣體穿透能力，而經乙酰化改質之纖維素雖然在氣體阻隔性沒有顯著的改善，但在水蒸氣穿透率有較低的表現。和單純塗佈PVA之影印紙相比，CNC120 B有最佳的屏障性能，透氣性下降了39.4%，水蒸氣穿透率下降了18.3%，而乙烯穿透力則下降了16.7~77.8%(不同時間)，其中香蕉的失重率減少了25.9%，醣度也減低了17.2%，顯示本研究製備之奈米纖維素塗料具有應用於水果保鮮包材之潛力。

關鍵字

包裝材料 ； 水果保鮮 ； 奈米纖維素材料 ； 纖維素改質 ； 乙烯

並列摘要

This study formulates different proportions of nanofiber materials (Cellulose nanofibrils, CNF and Cellulose nanocrystals, CNC) and their hydrophobized modified products, Nanoclay (NC), Polyvinyl Alcohol (PVA) and Glyoxal (Ethanedial, ED) is formulate into coating. The properties of the coating show that the barrier performance of the smaller cellulose particle size is better. The higher the zeta potential, the better the suspension degree of the nanofiber material and the reduction of agglomeration. The properties of the paper show that the cellulose content is about 10-20% to the best and has the lowest gas penetration ability. Although the acetylated modified cellulose has no significant improvement in gas barrier properties, the penetration rate of water vapor has a low performance. Compared with copier paper coated with PVA alone, CNC120 B has the best barrier performance, with air permeability reduced by 39.4%, water vapor transmission rate by 18.3%. Ethylene penetration by 16.7-77.8% (At different times), the weight loss rate of bananas was reduced by 25.9%. The sugar content was also reduced by 17.2%, indicating that the nanocellulose coating prepared in this study has the potential to be applied to fruit preservation packaging materials.

並列關鍵字

packaging materials ； fruit preservation ； cellulose nanomaterials ； cellulose modification ； ethylene

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