Design and characterization of cellulose fibers with hierarchical structure for polymer reinforcement
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This paper describes an approach to manufacture hierarchical composites from environmentally friendly materials by grafting cellulose whiskers onto regenerated cellulose fibers (Cordenka 700). Fourier Transform Infrared spectroscopy, Scanning Electron Microscopy and X-ray diffraction analysis were performed to verify the degree of modification. The mechanical properties of the unmodified and modified fibers were analyzed using fiber bundle tensile static and loading–unloading tests. To show the effect of cellulose whiskers grafting on the Cordenka fibers, epoxy based composites were manufactured and tensile tests done on transverse uni-directional specimens. The mechanical properties were significantly increased by fiber modification and addition of the nano-phase into composite reinforced with micro-sized fibers.
KeywordsCellulose Nanowhiskers Composites Interfaces Mechanical properties
The authors would like to thank Hassan II Academy of Science and Technologies, the Swedish Research Council (Ref. Nr. 2009-6433) and CNRST-Morocco for their financial support. The authors would like to thank Dr Z. OUNAIES from Pennsylvania State University for ATR-FTIR analyses.
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