Development of CNC-reinforced PBAT nanocomposites with reduced percolation threshold: a comparative study on the preparation method

Autor: Dogan Arslan, Mohammadreza Nofar, Deniz Sema Sarul, Yusuf Kahraman, Gurbuz Gunes, Emre Vatansever, Ali Durmus
Rok vydání: 2020
Předmět:
Zdroj: Journal of Materials Science. 55:15523-15537
ISSN: 1573-4803
0022-2461
DOI: 10.1007/s10853-020-05105-4
Popis: Cellulose nanocrystal (CNC)-reinforced poly(butylene adipate-co-terephthalate) (PBAT) nanocomposites with CNC contents of 1, 3, and 5 wt% were prepared through either solution casting or dilution of a PBAT/CNC masterbatch through melt mixing. The efficiency of these preparation approaches on CNC dispersion quality was examined using transmission electron microscopy and rheological analysis. It was found that solution-casted nanocomposites possessed a much finer CNC dispersion, while melt mixing could cause the formation of CNC agglomerates. In the nanocomposites, the rheological percolation threshold through small-amplitude oscillatory shear experiments was determined to be around 2.18 and 3.15 wt% CNC, respectively. The PBAT melt crystallization was also promoted with CNC regardless of the preparation method. The oxygen permeability of PBAT remarkably reduced with the CNC incorporation, specifically in the solution-casted nanocomposites with finer CNC dispersion. The thermal degradation, thermomechanical, and mechanical properties of the nanocomposites were also compared although no significant differences were observed.
Databáze: OpenAIRE
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