Eucalyptus wood nanofibrils as reinforcement of carrageenan and starch biopolymers for improvement of physical properties

Tonoli G. H. D., . and Bufalino L., . and Mendes L. M., . and Lopes T. A., . and Júnior M. G., . Eucalyptus wood nanofibrils as reinforcement of carrageenan and starch biopolymers for improvement of physical properties. pp. 292-303. ISSN 0128-1283

In tropical countries there are innumerous options of biodegradable polymers and lignocellulosic sources to produce green nanocomposites. The main drawback of carrageenan and starch application for packaging is their poor strength in high moisture conditions. However blending and addition of cellulose nanofibrils may overcome the limitation. This investigation aimed to compare the physical strength of starch and carrageenan films and to determine the best blending proportion of these biopolymers. In addition a recommended load of eucalyptus cellulose nanofibrils to produce nanocomposites with improved physical strength was investigated. Carrageenan replaced starch at proportions 100 80 50 20 and 0. Cellulose nanofibrils were produced from eucalyptus sawdust and added to the films at 10 20 and 30 loads. Carrageenan is more hydrophilic than starch hence it should be applied up to 20 in blends. The increase of nanofibrils from 10 to 30 decreased water solubility and absorption while density increased. A 10 load of nanofibrils was enough to decrease water vapor permeability. The physical strength of carrageenan for packaging may be improved by blending with starch and adding 30 of cellulose nanofibrils.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v30n3/2...

Abstract

In tropical countries there are innumerous options of biodegradable polymers and lignocellulosic sources to produce green nanocomposites. The main drawback of carrageenan and starch application for packaging is their poor strength in high moisture conditions. However blending and addition of cellulose nanofibrils may overcome the limitation. This investigation aimed to compare the physical strength of starch and carrageenan films and to determine the best blending proportion of these biopolymers. In addition a recommended load of eucalyptus cellulose nanofibrils to produce nanocomposites with improved physical strength was investigated. Carrageenan replaced starch at proportions 100 80 50 20 and 0. Cellulose nanofibrils were produced from eucalyptus sawdust and added to the films at 10 20 and 30 loads. Carrageenan is more hydrophilic than starch hence it should be applied up to 20 in blends. The increase of nanofibrils from 10 to 30 decreased water solubility and absorption while density increased. A 10 load of nanofibrils was enough to decrease water vapor permeability. The physical strength of carrageenan for packaging may be improved by blending with starch and adding 30 of cellulose nanofibrils.

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Item Type:	Article
AGROVOC Term:	Carrageenans
AGROVOC Term:	Polysaccharides
AGROVOC Term:	Rhodophyta
AGROVOC Term:	Starch
AGROVOC Term:	Starch crops
AGROVOC Term:	Biopolymers
AGROVOC Term:	Cellulose film
AGROVOC Term:	Eucalyptus urophylla
AGROVOC Term:	Electron microscopy
AGROVOC Term:	Physical properties
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24770

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