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|title: ||Synthesis and characterization of new CaCO(3)/cellulose nanocomposites prepared by controlled hydrolysis of dimethylcarbonate|
|authors: ||Vilela, Carla|
Freire, Carmen S. R.
Marques, Paula A. A. P.
Pascoal Neto, Carlos
|keywords: ||Cellulose fibers|
|issue date: ||Mar-2010|
|abstract: ||CaCO3/cellulose nanocomposite materials were prepared by the controlled reaction of CaCl2 with dimethylcarbonate
((CH3)2CO3) in alkaline medium in the presence of cellulose fibers. The effect of several reaction
parameters, such as reaction time, temperature, fiber mass fraction and extent of cellulose
modification (carboxymethylation), on the final properties of the nanocomposites was investigated by
ICP-AES, FT-IR, XRD, SEM, TGA, ToF-SIMS and XPS. The results showed that the hydrolysis conditions
strongly influenced the quantity and morphology of CaCO3 particles deposited at the surface of cellulosic
fibers. Under specific experimental conditions, the substrate promoted the selective control growth of
CaCO3 at the surface of the fibers. The use of these CaCO3/cellulose nanocomposites as reinforcing materials
in polyethylene (PE) based composites was also tested. Preliminary DMA studies showed a much
higher mechanical performance for the composites with the CaCO3/cellulose fibers nanocomposites as
compared to cellulose fibers.|
|publisher version/DOI: ||dx.doi.org/10.1016/j.carbpol.2009.10.056|
|source: ||Carbohydrate Polymers|
|appears in collections||DQ - Artigos|
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