MASS TRANSFER IN MEDIUM DENSITY FIBERBOARD (MDF) MODIFIED BY NA+ MONTMORILLONITE (NA+MMT) NANOCLAY

Reza Zahedsheijani, Hadi Gholamiyan, Asghar Tarmian, Hossein Yousefi

Abstract


The potential use of nanoclay was examined to modify fluid transfer properties of medium densityfiberboard (MDF). For this, Na+ montmorillonite (Na+MMT) nanoclay was added to urea formaldehyderesin to produce MDF. Then, the air permeability and mass diffusivity of MDF were evaluated. Scanningelectron microscope (SEM) images and X-ray diffraction (XRD) confirmed a dispersion and exfoliationof Na+MMT in the modified MDF. The air permeability presented a systematic decrease with increasingnanoclay amount. This reduction agreed with the simple ‘‘tortuous path’’ model. The nanoclay had noeffect on the mass diffusivity.

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