The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
New Nanocomposite Materials Reinforced with Flax Cellulose Nanocrystals in Waterborne Polyurethane
Abstract
New nanocomposite films were prepared from a suspension of cellulose nanocrystals as the filler and a polycaprolactone-based waterborne polyurethane (WPU) as the matrix. The cellulose nanocrystals, prepared by acid hydrolysis of flax fiber, consisted of slender rods with an average length of 327 +/- 108 nm and diameter of 21 +/- 7 nm, respectively. After the two aqueous suspensions were mixed homogeneously, the nanocomposite films were obtained by casting and evaporating. The morphology, thermal behavior, and mechanical properties of the films were investigated by means of attenuated total reflection Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, and tensile testing. The results indicated that the cellulose nanocrystals could disperse in the WPU uniformly and resulted in an improvement of microphase separation between the soft and hard segments of the WPU matrix. The films showed a significant increase in Young's modulus and tensile strength from 0.51 to 344 MPa and 4.27 to 14.86 MPa, respectively, with increasing filler content from 0 to 30 wt %. Of note is that the Young's modulus increased exponentially with the filler up to a content of 10 wt %. The synergistic interaction between fillers and between the filler and WPU matrix played an important role in reinforcing the nanocomposites. The superior properties of the new nanocomposite materials could have great potential applications.
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Metadata
- Authors
- Cao, X., Dong, H., & Li, C. M.
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-02-22
- Volume
- 8
- Issue
- 3
- Pages
- 899-904
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2074721290
- Cited by
- 462
- References
- 25
- FWCI
- 7.55
- Type
- journal article
- Language
- en
- Open access
- closed
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