The Effects of Montmorillonite and Cellulose Nanocrystals on Physical Properties of Carboxymethyl Cellulose/Polyvinyl Alcohol Blend Films

Document Type : Research Paper

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Abstract

Cellulose nanocrystal  )CNC) is a type of nanomaterial which is produced by  partial hydrolysis of cellulose and elimination of its amorphous regions.
CNC has several advantages such as biodegradability and safety toward human health. In this study, CNC was produced from cotton linters and methods such as transmission electron microscopy and atomic force microscopy were used for confrmation of nanoscale  size production of cellulose crystals. Carboxymethyl cellulose  )CMC)/polyvinyl alcohol  )PVA)-nanoclay  )MMT) and CMC-PVA-CNC flms, containing 3-10% (wt/wt CMC) nanofllers, were prepared by casting method and their physical properties were compared in order to approve the use of CNC instead of MMT for its contribution in improving the physical properties of carboxymethyl cellulose-based  flms.  The  X-ray  diffraction  results  indicated  the  formation  of  an exfoliated nanostructure at all nanoparticle concentrations. The results showed that there was no signifcant difference (p < 0.5) between the moisture absorption properties of flms containing the two types of nanofller. The flms containing nanoclay showed higher mechanical strength compared to those containing CNC. The ultimate tensile strengths of the flms containing 10% nanoclay and CNC were higher than the control flm (69.72% and 47.05%, respectively).

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Iranian Journal of Polymer Science and Technology
Volume 24, Issue 6 - Serial Number 6
March and April 2012
Pages 455-466

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