Biocomposites Based On Cellulose Acetate And Short Curaua Fibers Treated With Supercritical Co2 [biocompósitos De Acetato De Celulose E Fibras Curtas De Curauá Tratadas Com Co2 Supercrítico]
- Gutierrez M.C.
- Rosa P.T.V.
- De Paoli M.-A.
- Felisberti M.I.
DOIAbstract
In this work, the effect of preprocessing of short Curaua fibers with supercritical carbon dioxide on the properties of biocomposites with cellulose acetate was studied. The treatment with supercritical CO2 may result in the partial lignin extraction from the fibers. Two series of biocomposites, one plasticized with dioctyl phtalate (DOP) and another with triethyl citrate (TEC), were prepared by extrusion. Fibrilation and uniform distribution of fibers in the cellulose acetate matrix were observed for both biocomposites. As a consequence, the composites showed a higher specific heat, lower thermal conductivity and higher coefficient of thermal expansion than plasticized cellulose acetate. The treatment of the fibers increased such differenc...
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