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Monodisperse highly ordered chitosan/cellulose nanocomposite foams
- Source :
- Composites Part A: Applied Science and Manufacturing. 125:105516
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In solid foams, most physical properties are determined by the pore size and shape distributions and the organisation of the pores. For this reason, it is important to control the structure of porous materials. We recently tackled this issue with the help of microfluidic-aided foam templating, which allowed us to generate monodisperse and highly ordered chitosan foams. However, the properties of foams also depend on the properties of the pore wall constituents. In case of chitosan-based foams, the foams have poor absolute mechanical properties, simply due to the fact that the solubility of chitosan in water is very low, so that the relative density of the freeze-dried foams becomes very small. Drawing inspiration from the field of nanocomposites, we incorporated cellulose nanofibres into the foamed chitosan solutions, with a view to strengthening the pore walls in the foam and thus the mechanical properties of the final foam. We report here how the cellulose nanofibres affect the structure of both the liquid foam template and the solid foam. The resulting nanocomposite foams have improved mechanical properties, which, however, are not proportional to the amount of cellulose nanofibres in the composites. One reason for this observation is the disturbance of the porous structure of the solid foams by the cellulose nanofibres.
- Subjects :
- Materials science
Nanocomposite
Dispersity
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Chitosan
chemistry.chemical_compound
chemistry
Mechanics of Materials
Ceramics and Composites
Relative density
Solubility
Cellulose
Composite material
0210 nano-technology
Porosity
Porous medium
Subjects
Details
- ISSN :
- 1359835X
- Volume :
- 125
- Database :
- OpenAIRE
- Journal :
- Composites Part A: Applied Science and Manufacturing
- Accession number :
- edsair.doi...........5850479b51e2cb6bd5cc24b60b733399