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International Journal of Polymer Science
Volume 2019, Article ID 1065024, 17 pages
https://doi.org/10.1155/2019/1065024
Research Article

Influence of Natural Fillers on Thermal and Mechanical Properties and Surface Morphology of Cellulose Acetate-Based Biocomposites

1Department of Material Technologies, Faculty of Forestry, University of Zagreb, 10 002 Zagreb, Croatia
2Department of Wood Science and Technology, Biotechnical Faculty, University of Ljubljana, 1 000 Ljubljana, Slovenia

Correspondence should be addressed to Nikola Španić; rh.kafmus@cinapsn

Received 27 February 2019; Revised 29 April 2019; Accepted 22 May 2019; Published 27 June 2019

Academic Editor: Qinglin Wu

Copyright © 2019 Nikola Španić et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In the present study, the influence of adding natural fillers to a cellulose acetate (CA) matrix, in order to develop biocomposites, on the properties of the achieved materials has been investigated. Extracted wood flour, holocellulose, and alpha cellulose were used as appropriate fillers. The results of the thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) of the fillers and biocomposites suggested the importance of the degree of degradation of filler properties, induced by the chemical treatment necessary for the preparation of the fillers, with emphasis on the content of lignin and the degradation of cellulose. Scanning electron microscopy (SEM) and mechanical analysis revealed that the matrix-filler ratio had a major effect on the prepared CA-based biocomposites, since polarity differences between the two major components caused the reduction of attractive forces in the matrix-filler relation, subsequently altering the properties of the developed materials.