Cellulose-based Barrier packaging

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Kemiantekniikan korkeakoulu | Bachelor's thesis
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Authors

Date

2024-05-27

Department

Major/Subject

Biotuotteet

Mcode

CHEM3048

Degree programme

Kemiantekniikan kandidaattiohjelma

Language

en

Pages

25/37

Series

Abstract

This study investigated the feasibility of cellulose-based barrier materials through available literature. Barrier, or protective layers of packaging, are currently made from environmentally harmful synthetic polymers, so a shift to renewable cellulose would be crucial for the environment. The study focused on two forms of cellulose at the nanoscale. cellulose nanofibrils and cellulose nanocrystals. The literature revealed that both forms of nanocellulose exhibit excellent barrier properties against gases such as oxygen and carbon dioxide, as well as oils and greases. However, the aroma and flavour- barrier properties had not been adequately explored, indicating a need for further experiments and research. Both forms exhibited weak moisture barrier properties, allowing moisture to pass through easily. Other challenges included the high cost and difficult processing of nanocellulose. Many experiments have been conducted to improve moisture resistance by modifying nanocellulose to be more hydrophobic. Methods include altering the functional groups of cellulose or blending cellulose with a more hydrophobic material. Another approach is to add a separate layer on top of the cellulose barrier, thus acting as a moisture barrier. The study found that nanocellulose in barrier packaging is still in the early stages of development but shows promising characteristics for barrier technology and recyclability. With further research and experiments, nanocellulose could be commercialized for widespread use in consumer packaging.

Description

Supervisor

Kontturi, Eero

Thesis advisor

Kimiaei, Erfan

Keywords

cellulose, barrier packaging, CNF, CNC

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Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202406254949

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[kand] Kemian tekniikan korkeakoulu / CHEM