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Nanocomposites from Clay, Cellulose Nanofibrils, and Epoxy with Improved Moisture Stability for Coatings and Semistructural Applications
- Publication Year :
- 2019
- Publisher :
- AMER CHEMICAL SOC, 2019.
-
Abstract
- A new type of high reinforcement content clay–cellulose–thermoset nanocomposite is proposed, where epoxy precursors diffuse into a wet porous clay–nanocellulose mat, followed by curing. The processing concept was scaled to >200 μm thickness composites, the mechanical properties were high for nanocomposites, and the materials showed better tensile properties at 90% RH compared with typical nanocellulose materials. The nanostructure and phase distributions were studied using transmission electron microscopy; Young’s modulus, yield strength, ultimate strength, and ductility were determined as well as moisture sorption, fire retardancy, and oxygen barrier properties. Clay and cellulose contents were varied as well as the epoxy content. Epoxy had favorable effects on moisture stability and also improved reinforcement effects at low reinforcement content. A more homogeneous nano- and mesoscale epoxy distribution is still required for further property improvements. The materials constitute a new type of three-ph...
- Subjects :
- Nanocomposite
Materials science
biocomposite
humidity
Epoxy
montmorillonite
Nanocellulose
chemistry.chemical_compound
Montmorillonite
chemistry
visual_art
nanocellulose
mechanical
Ultimate tensile strength
visual_art.visual_art_medium
General Materials Science
Composite material
Biocomposite
Porosity
Curing (chemistry)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....121c6ed5e6a94aa8f27ca492b68464b3