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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
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Chitosan-based nanocomposite matrices: Development and characterization.
Diego Alejandro Marín-Silva1, Sandra Rivero2, Adriana Pinotti3
1CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata B1900AJJ, Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), La Plata 1900, Argentina.
International Journal of Biological Macromolecules
|November 12, 2018
Summary
Cellulose nanocrystals (CNC) reinforce chitosan films, creating advanced biodegradable packaging. These nanocomposites exhibit enhanced properties, showing promise for custom material development.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Chitosan-based nanocomposites offer significant industrial potential for novel material design.
- Cellulose nanocrystals (CNC) are derived from microcrystalline cellulose (MCC) via acid hydrolysis.
- Developing advanced materials requires understanding component interactions and properties.
Purpose of the Study:
- To investigate the microstructure of CNC isolated from MCC under varying hydrolysis times.
- To fabricate and characterize chitosan-based nanocomposite films incorporating CNC.
- To analyze structural, thermo-mechanical, and spectral properties of the developed nanocomposites.
Main Methods:
- Controlled sulfuric acid hydrolysis of MCC to isolate CNC.
- Fabrication of chitosan-based films with varying CNC content.
- Characterization using SEM, TEM, DLS, ATR-FTIR, PCA, and PLS.
- Evaluation of structural, thermo-mechanical, and spectral properties.
Main Results:
- Optimal CNC isolation from MCC achieved after 2-hour hydrolysis, confirmed by size measurements (TEM, DLS).
- SEM revealed effective assembly and integration of CNC within the chitosan (CH) matrix.
- Incorporation of CNC significantly enhanced mechanical properties due to strong filler-matrix interactions.
- ATR-FTIR and chemometric analysis (PCA, PLS) identified spectral differences indicating phase affinity.
Conclusions:
- Cellulose nanocrystals serve as effective reinforcing agents in chitosan-based nanocomposites.
- The developed nanocomposites demonstrate suitability for biodegradable packaging applications.
- This study highlights the potential for creating tailor-made materials with tunable properties using CNC and chitosan.
Keywords:
Cellulose nanocrystalsMicrostructural analysisNanocomposite chitosan filmThermomechanical propertiesMore Related Videos
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