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Investigation of graphene and nanocellulose hybrid films as a barrier material in packages

Bodelsson, Jens LU (2019) KASM15 20182
Centre for Analysis and Synthesis
Abstract
In this report, hybrid films of carboxymethylated cellulose nanofibrils (CNF) and graphene nanosheets (GNs) have been prepared to evaluate if the GNs can enhance the barrier properties of the CNF films. CNF already possess great barrier properties at low relative humidity (RH) but it is drastically lowered when the RH reaches above 50% due to its strong hydrophilicity of CNF. This report shows that the water vapour permeability(WVP) of the hybrid film can be lowered more than 25 times at 50% RH in comparison to the pure nanocellulose film due to the hydrophobic properties and good impermeability properties of GNs. The report also shows how different parameters such as sonication time, starting materials and ratios should be chosen when... (More)
In this report, hybrid films of carboxymethylated cellulose nanofibrils (CNF) and graphene nanosheets (GNs) have been prepared to evaluate if the GNs can enhance the barrier properties of the CNF films. CNF already possess great barrier properties at low relative humidity (RH) but it is drastically lowered when the RH reaches above 50% due to its strong hydrophilicity of CNF. This report shows that the water vapour permeability(WVP) of the hybrid film can be lowered more than 25 times at 50% RH in comparison to the pure nanocellulose film due to the hydrophobic properties and good impermeability properties of GNs. The report also shows how different parameters such as sonication time, starting materials and ratios should be chosen when making films. A scale-up part of the project is also done in collaboration with the industry where an easier way of dispersion and a faster application of the film is evaluated. (Less)
Popular Abstract (Swedish)
Forskning har visat att den största delen av allt plastskräp i haven kommer från förpackningsindustrin. Då plasten inte bryts ner på flera decennier görs nu stora försök med att försöka få fram bionedbrytbara alternativ. I det här arbetet undersöks om nanocellulosa kan fungera som ett alternativ till de plastbarriärer som används för att hålla livsmedel fräscha.
Please use this url to cite or link to this publication:
author
Bodelsson, Jens LU
supervisor
organization
course
KASM15 20182
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Nanocellulose, CNF, Graphene, Barrier, Dispersion, graphene nanosheets, coating, sonication, carboxymethylated, polymer technology, polymerteknologi
language
English
id
8972540
date added to LUP
2019-03-11 11:23:11
date last changed
2019-03-11 11:23:11
@misc{8972540,
  abstract     = {{In this report, hybrid films of carboxymethylated cellulose nanofibrils (CNF) and graphene nanosheets (GNs) have been prepared to evaluate if the GNs can enhance the barrier properties of the CNF films. CNF already possess great barrier properties at low relative humidity (RH) but it is drastically lowered when the RH reaches above 50% due to its strong hydrophilicity of CNF. This report shows that the water vapour permeability(WVP) of the hybrid film can be lowered more than 25 times at 50% RH in comparison to the pure nanocellulose film due to the hydrophobic properties and good impermeability properties of GNs. The report also shows how different parameters such as sonication time, starting materials and ratios should be chosen when making films. A scale-up part of the project is also done in collaboration with the industry where an easier way of dispersion and a faster application of the film is evaluated.}},
  author       = {{Bodelsson, Jens}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Investigation of graphene and nanocellulose hybrid films as a barrier material in packages}},
  year         = {{2019}},
}