Synergistic Reinforcement of Composite Hydrogels with Nanofiber Mixtures of Cellulose Nanocrystals and Chitin Nanofibers
| Autor: | J. Carson Meredith, Victor Breedveld, Jianshan Liao, Meisha L. Shofner, Cameron W. Irvin, Paul S. Russo, Chinmay C. Satam |
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| Rok vydání: | 2020 |
| Předmět: |
Absorption of water
Materials science Polymers and Plastics Nanofibers Chitin Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Polyvinyl alcohol Biomaterials chemistry.chemical_compound Rheology Materials Chemistry Surface charge Cellulose Nanocomposite Hydrogels 021001 nanoscience & nanotechnology Environmentally friendly 0104 chemical sciences chemistry Chemical engineering Nanofiber Nanoparticles 0210 nano-technology |
| Zdroj: | Biomacromolecules. 22:340-352 |
| ISSN: | 1526-4602 1525-7797 |
| DOI: | 10.1021/acs.biomac.0c01198 |
| Popis: | Simultaneous incorporation of cellulose nanocrystals (CNCs) and chitin nanofibers (ChNFs) into a polyvinyl alcohol (PVA) matrix opens possibilities for customization of more environmentally friendly composite materials. When used in tricomponent composite hydrogels, the opposite surface charges on CNCs and ChNFs lead to the construction of beneficial nanofiber structures. In this work, composite hydrogels containing CNCs, ChNFs, or their mixtures are produced using cyclic freeze-thaw (FT) treatments. When considering different compositions and FT cycling, tricomponent composite hydrogels containing a specific ratio of CNCs/ChNFs are shown to have promising mechanical performance in comparison to other samples. These results together with results from water absorption, rheological, and light scattering studies suggest that the CNC/ChNF structures produced property improvement by concurrently accessing the stronger interfacial interactions between CNCs and PVA and the longer lengths of the ChNFs for load transfer. Overall, these results provide insight into using electrostatically driven nanofiber structures in nanocomposites. |
| Databáze: | OpenAIRE |
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