Journal
ACS OMEGA
Volume 2, Issue 6, Pages 2678-2688Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.7b00387
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Funding
- Programme d'Actions Integres franco-belge Tournesol [34226QH]
- LabEx Tec 21 [ANR-11-LABX-0030]
- PolyNat Carnot Institut [ANR-11-CARN-030-01]
- Science Policy Office of the Belgian Federal Government [PAI 7/5]
- European Commission/Walloon Region
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Cellulose nanocrystal (CNC)-reinforced poly(lactic acid) (PLA) nanocomposites were prepared by twin-screw extrusion followed by injection-molding using a masterbatch approach. [GRAPHIC] Noncovalent modification of CNCs was performed with two different poly(L-lactide) (PLLA)-based surfactants to improve the filler/matrix compatibility. They both have a PLLA block that is expected to improve the compatibility with the PLA matrix and differ by the polar head. It consists of either a poly(ethylene glycol) (PEG) block (PEG-b-PLLA) or an imidazolium group (Im-PLLA), that is able to interact with the surface of the CNCs. The morphological, structural, thermal, rheological, and mechanical properties of the nanocomposites were investigated. The different modes of interaction of the polar head of the surfactant lead to different properties. However, the global decrease in the molecular weight of PLA, induced by the short PLLA blocks from the surfactants and the possible degradation during melt processing, results in a plasticization effect and impacts the crystallization of the matrix.
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