Journal
CELLULOSE
Volume 15, Issue 2, Pages 323-331Publisher
SPRINGER
DOI: 10.1007/s10570-007-9168-2
Keywords
alkali treatment; cellulose nanofibers; microfibrillated cellulose; nanocomposites; phenol-formaldehyde; sodium hydroxide; toughness; work of fracture
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Nanocomposites were produced with NaOH aqueous solution-treated microfibrillated cellulose (MFC) and phenolic resin, and the mechanical properties were compared with their microcomposite counterparts based on pulp fiber. Tensile tests showed that strong alkali-treated MFC nanocomposites with resin content around 20 wt.% achieved strain at fracture values two times higher than those of untreated MFC nanocomposites and five times higher than those of untreated pulp microcomposites. The improvement in work of fracture of alkali-treated MFC nanocomposites was attributed to the ductility of the nanofibers caused by transformations in the amorphous regions along the cellulose microfibrils.
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