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Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X

Resumo

ZAHEDSHEIJANI, Reza; GHOLAMIYAN, Hadi; TARMIAN, Asghar  e  YOUSEFI, Hossein. Mass transfer in medium density fiberboard (MDF) modified by Na+ montmorillonite (Na+MMT) nanoclay. Maderas, Cienc. tecnol. [online]. 2011, vol.13, n.2, pp.163-172. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2011000200004.

The potential use of nanoclay was examined to modify fluid transfer properties of medium density fiberboard (MDF). For this, Na+ montmorillonite (Na+MMT) nanoclay was added to urea formaldehyde resin to produce MDF. Then, the air permeability and mass diffusivity of MDF were evaluated. Scanning electron microscope (SEM) images and X-ray diffraction (XRD) confirmed a dispersion and exfoliation of Na+MMT in the modified MDF. The air permeability presented a systematic decrease with increasing nanoclay amount. This reduction agreed with the simple ‘‘tortuous path’’ model. The nanoclay had no effect on the mass diffusivity.

Palavras-chave : Air permeability; mass diffusivity; medium density fiberboard; MDF; Na+MMT nanoclay.

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