Reactive graphene as highly efficient compatibilizer for cocontinuous poly(lactic acid)/poly(ε-caprolactone) blends toward robust biodegradable nanocomposites

Polymer blend nanocomposites with cocontinuous morphology are popular options for realizing various functions, whereas their miscibility and mechanical properties are usually marginalized. Herein, mechanically strong biodegradable nanocomposites were achieved by exploiting the vinyl functionalized g...

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Bibliographic Details
Published in:Composites science and technology 2022-04, Vol.221, p.109326, Article 109326
Main Authors: Wang, Bin, Ye, Xin, Wang, Bowen, Li, Xiping, Xiao, Shanglin, Liu, Hesheng
Format: Article
Language:English
Subjects:
Atomic force microscopy
Biodegradability
Biodegradable materials
Biopolymers
Compatibility
Compatibilizers
Graphene
Interface/interphase
Mechanical properties
Mechanical property
Miscibility
Nanocomposites
Polycaprolactone
Polylactic acid
Polymer blends
Polymer-matrix composites
Polymers
Rheological behavior
Rheological properties
Tensile strength
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Summary:Polymer blend nanocomposites with cocontinuous morphology are popular options for realizing various functions, whereas their miscibility and mechanical properties are usually marginalized. Herein, mechanically strong biodegradable nanocomposites were achieved by exploiting the vinyl functionalized graphene (VGN) as a highly efficient compatibilizer for cocontinuous poly (lactic acid)/poly (ε-caprolactone) (PLA/PCL) blends. After being reactively compatibilized using 0.5, 1.0, and 2.0 wt% of VGN, the phase size of cocontinuous PLA/PCL blend was remarkably decreased, and the tensile strength was increased by 200%, 280%, and 253%, respectively. Moreover, the reactively compatibilized PLA/PCL/VGN blend nanocomposites were more ductile than the PLA/PCL blend. Efficient compatibilization and strong interfacial interactions were responsible for the enhanced mechanical properties. The strong interfacial interactions in reactively compatibilized PLA/PCL/VGN blend nanocomposites were evidenced by the linear rheological and atomic force microscopical modulus measuring results. This work provides a facile strategy for compatibilizing and reinforcing biodegradable polymer blend nanocomposites using reactive graphene, which can be potentially used as highly efficient compatibilizers for immiscible biopolymer blends. [Display omitted]
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2022.109326