The fabrication of polylactide/cellulose nanocomposites with enhanced crystallization and mechanical properties

Polylactide/cellulose nanocomposites were fabricated by blending of commercial polylactide (PLA) and modified cellulose nanocrystals (CNCs). Modified CNCs were prepared via the in situ polymerization of CNCs and L-lactic acid (CNCs-PLLA) or D-lactic acid (CNCs-PDLA). The actual occurrence of chemica...

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Bibliographic Details
Published in:International journal of biological macromolecules 2020-07, Vol.155, p.1578-1588
Main Authors: Chai, Hongbin, Chang, Yue, Zhang, Yunchong, Chen, Zhize, Zhong, Yi, Zhang, Linping, Sui, Xiaofeng, Xu, Hong, Mao, Zhiping
Format: Article
Language:English
Subjects:
Cellulose - chemistry
Cellulose Nanocrystals
Crystallization
Mechanical and crystallization properties
Mechanical Phenomena
Nanocomposites - chemistry
Polyesters - chemistry
Polylactide
Polymerization
Tensile Strength
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Summary:Polylactide/cellulose nanocomposites were fabricated by blending of commercial polylactide (PLA) and modified cellulose nanocrystals (CNCs). Modified CNCs were prepared via the in situ polymerization of CNCs and L-lactic acid (CNCs-PLLA) or D-lactic acid (CNCs-PDLA). The actual occurrence of chemical bond between CNCs and PLA segment was confirmed by Fourier transform infrared, nuclear magnetic resonance, X-ray diffraction and solubility tests. Differential scanning calorimetry and X-ray diffraction characterization indicated that CNCs-PDLA better improved the crystallization ability of PLA matrix compared with CNCs-PLLA. Furthermore, compared with the neat PLA (60.0 MPa), the tensile strength of resulting nanocomposites showed an enhancement of up to 36% (81.65 MPa). And the nanocomposites with CNCs-PDLA exhibited both high crystallinity and improved mechanical properties.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2019.11.135