Tags

Type your tag names separated by a space and hit enter

Effects of molecular weight and crystallizability of polylactide on the cellulose nanocrystal dispersion quality in their nanocomposites.
Int J Biol Macromol. 2020 Jul 01; 154:276-290.IJ

Abstract

This study investigated how cellulose nanocrystals (CNC) dispersion quality and its percolation network formation could be influenced when using polylactide (PLA) with various molecular weights and crystallizability. In this context, systematic rheological experiments were conducted on PLA/CNC nanocomposites prepared through solution casting method using dimethylformamide (DMF) as the solvent. It was found that lower CNC percolation concentrations could be obtained when a PLA matrix possesses lower molecular weight as the shorter chains and CNCs interpenetration could be facilitated during their dissolution in the solvent. On the other hand, the CNC percolation concentration was further lowered when the PLA with higher crystallizability was used. During the solvent evaporation step that occurred at 85 °C, the isothermal heterogeneous crystallization of PLA around the dispersed CNCs could prevent the driving force of the CNCs towards their re-agglomeration. Therefore, the finest CNC dispersion was appeared in the highly crystallizable low molecular weight PLA through which the rheological properties were dramatically improved and the thermal stability was significantly extended to higher temperatures. The crystallization behavior of the prepared nanocomposites was also analyzed using differential scanning calorimeter and X-ray diffractometer. The thermal degradation behavior of the PLA/CNC nanocomposites were examined through thermogravimetric and rheological analysis.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Vatansever E
Polymer Science and Technology Program, Institute of Science and Technology, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.
Arslan D
Metallurgical and Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.
Sarul DS
Polymer Science and Technology Program, Institute of Science and Technology, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.
Kahraman Y
Metallurgical and Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.
Nofar M
Polymer Science and Technology Program, Institute of Science and Technology, Istanbul Technical University, Maslak, Istanbul 34469, Turkey; Metallurgical and Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey. Electronic address: nofar@itu.edu.tr.

MeSH

CelluloseCrystallizationMechanical PhenomenaMolecular WeightNanocompositesNanoparticlesPolyestersRheology

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32184137

Citation

Vatansever, Emre, et al. "Effects of Molecular Weight and Crystallizability of Polylactide On the Cellulose Nanocrystal Dispersion Quality in Their Nanocomposites." International Journal of Biological Macromolecules, vol. 154, 2020, pp. 276-290.
Vatansever E, Arslan D, Sarul DS, et al. Effects of molecular weight and crystallizability of polylactide on the cellulose nanocrystal dispersion quality in their nanocomposites. Int J Biol Macromol. 2020;154:276-290.
Vatansever, E., Arslan, D., Sarul, D. S., Kahraman, Y., & Nofar, M. (2020). Effects of molecular weight and crystallizability of polylactide on the cellulose nanocrystal dispersion quality in their nanocomposites. International Journal of Biological Macromolecules, 154, 276-290. https://doi.org/10.1016/j.ijbiomac.2020.03.115
Vatansever E, et al. Effects of Molecular Weight and Crystallizability of Polylactide On the Cellulose Nanocrystal Dispersion Quality in Their Nanocomposites. Int J Biol Macromol. 2020 Jul 1;154:276-290. PubMed PMID: 32184137.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of molecular weight and crystallizability of polylactide on the cellulose nanocrystal dispersion quality in their nanocomposites. AU - Vatansever,Emre, AU - Arslan,Dogan, AU - Sarul,Deniz Sema, AU - Kahraman,Yusuf, AU - Nofar,Mohammadreza, Y1 - 2020/03/14/ PY - 2020/01/27/received PY - 2020/03/06/revised PY - 2020/03/13/accepted PY - 2020/3/19/pubmed PY - 2021/2/11/medline PY - 2020/3/19/entrez KW - Cellulose Nanocrystals KW - Crystallization KW - Molecular weight KW - Nanocomposites KW - Polylactide KW - Rheological properties SP - 276 EP - 290 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 154 N2 - This study investigated how cellulose nanocrystals (CNC) dispersion quality and its percolation network formation could be influenced when using polylactide (PLA) with various molecular weights and crystallizability. In this context, systematic rheological experiments were conducted on PLA/CNC nanocomposites prepared through solution casting method using dimethylformamide (DMF) as the solvent. It was found that lower CNC percolation concentrations could be obtained when a PLA matrix possesses lower molecular weight as the shorter chains and CNCs interpenetration could be facilitated during their dissolution in the solvent. On the other hand, the CNC percolation concentration was further lowered when the PLA with higher crystallizability was used. During the solvent evaporation step that occurred at 85 °C, the isothermal heterogeneous crystallization of PLA around the dispersed CNCs could prevent the driving force of the CNCs towards their re-agglomeration. Therefore, the finest CNC dispersion was appeared in the highly crystallizable low molecular weight PLA through which the rheological properties were dramatically improved and the thermal stability was significantly extended to higher temperatures. The crystallization behavior of the prepared nanocomposites was also analyzed using differential scanning calorimeter and X-ray diffractometer. The thermal degradation behavior of the PLA/CNC nanocomposites were examined through thermogravimetric and rheological analysis. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/32184137/Effects_of_molecular_weight_and_crystallizability_of_polylactide_on_the_cellulose_nanocrystal_dispersion_quality_in_their_nanocomposites_ DB - PRIME DP - Unbound Medicine ER -