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Understanding the mechanisms of oxygen diffusion through surface functionalized nanocellulose films
- Source :
- Peresin, M S, Kammiovirta, K, Heikkinen, H, Johansson, L-S, Vartiainen, J, Setälä, H, Österberg, M & Tammelin, T 2017, ' Understanding the mechanisms of oxygen diffusion through surface functionalized nanocellulose films ', Carbohydrate Polymers, vol. 174, pp. 309-317 . https://doi.org/10.1016/j.carbpol.2017.06.066
- Publication Year :
- 2017
- Publisher :
- Elsevier, 2017.
-
Abstract
- A concept for direct surface modification on self-standing films of cellulose nanofibrils (CNF) is demonstrated using an aminosilane group in cellulose compatible solvent (dimethyl acetamide, DMA). The chemically modified structure efficiently prevents the oxygen molecules from interacting with the nanocellulose film in the presence of water molecules. Oxygen permeability values lower than 1 mL mm m-2 day-1 atm-1 were achieved at extremely high levels of relative humidity (RH95%). The aminosilane reaction is compared to conventional hydrophobization reaction using hexamethyldisilazane. The differences with respect to interactions between cellulosic nanofibrils, water and oxygen molecules taking place with aminated and silylated CNF films correlated with the degree of surface substitution, surface hydrophilicity and permeability of the formed layer. The self-condensation reactions taking place on the film surface during aminosilane-mediated bonding were decisive for low oxygen permeability. Experimental evidence on the importance of interfacial processes that hinder the water-cellulose interactions while keeping film's low affinity towards oxygen is demonstrated.
- Subjects :
- Polymers and Plastics
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
01 natural sciences
Oxygen
Nanocellulose
Oxygen permeability
chemistry.chemical_compound
Polymer chemistry
Materials Chemistry
Molecule
Cellulose
ta216
ta215
ta116
Chemistry
Organic Chemistry
Relative humidity
021001 nanoscience & nanotechnology
0104 chemical sciences
Solvent
Chemical engineering
Permeability (electromagnetism)
Surface functionalization
Aminosilane reaction
Surface modification
Cellulose nanofibrils
0210 nano-technology
CNF film
Subjects
Details
- Language :
- English
- ISSN :
- 18791344 and 01448617
- Volume :
- 174
- Database :
- OpenAIRE
- Journal :
- Carbohydrate Polymers
- Accession number :
- edsair.doi.dedup.....291de1f90e3c698510a0851d23a8c18f