Morphological investigation of polylactide/microfibrillated cellulose composites

Morphological investigation of polylactide/microfibrillated cellulose composites

Optical microscopy and transmission electron microscopy have been used to investigate the morphology of polylactide (PLA)/microfibrillated cellulose (MFC) composites prepared by: compression molding of wet-comingled MFC and PLA latex or powder, twin-screw extrusion of the wet-comingled compounds, an...

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Bibliographic Details
Published in:Colloid and polymer science Vol. 291; no. 9; pp. 2203 - 2211
Main Authors: Plummer, Christopher J. G., Choo, Caleb K. C., Boissard, Carole I. R., Bourban, Pierre-Etienne, Månson, Jan-Anders E.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2013
Springer
Springer Nature B.V
Subjects:
Applied sciences
Cellular communication
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Composites
Exact sciences and technology
Food Science
Forms of application and semi-finished materials
Nanotechnology and Microengineering
Original Contribution
Physical Chemistry
Polymer industry, paints, wood
Polymer Sciences
Soft and Granular Matter
Technology of polymers
Optical microscopy
Transmission electron microscopy
Nanocomposites
Polylactide
Morphology
Microfibrillated cellulose
Elastic modulus
Mixing
Dispersion degree
Cellulose
Mechanical properties
Experimental study
Compression molding
Lactic acid polymer
Concentration effect
Nanocomposite
Fabrication structure relation
Property structure relationship
Growth from solution
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Summary:Optical microscopy and transmission electron microscopy have been used to investigate the morphology of polylactide (PLA)/microfibrillated cellulose (MFC) composites prepared by: compression molding of wet-comingled MFC and PLA latex or powder, twin-screw extrusion of the wet-comingled compounds, and solvent mixing of PLA with MFC or acetylated MFC. Compression molding of wet-comingled MFC and PLA latex or powder compounds resulted in a cellular MFC network, whereas solvent-cast films showed a more uniform dispersion of MFC fibers. Somewhat lower aggregate diameters observed in the acetylated MFC were assumed to be due to decreased MFC hydrophilicity and improved chemical affinity with the PLA matrix. The MFC networks in the commingled compounds were severely disrupted after twin-screw extrusion. This confirmed the limited deformability of the networks inferred from the extensive syneresis during the initial compression molding step, and accounted for substantial losses in stiffness reinforcement by the MFC after extrusion.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-013-2968-z