Jevgenijs Jaunslavietis, Galia Shulga, Jurijs Ozolins, Brigita Neiberte, Anrijs Verovkins, Sanita Vitolina, Sandra Livca

Last modified: 05.06.2017


The aim of the work was to evaluate the effect of the acidic treatment temperature of aspen sawdust as a filler on the moisture sorption, wetting and mechanical properties of wood-polymer composites. Aspen wood sawdust was treated with the  dilute hydrochloric acid solution at 60oC and 90oC during 5 h. Both the treated particles and the filled composites were studied in terms of moisture sorption and wettability; their surface free energy was calculated using the Owens-Wendt-Rabel-Kaelble (OWRK) approach. The obtained results have shown that the acidic treatment of aspen wood sawdust at 90oC leads to an increase in its hydrophobicity that decreases the wettability and moisture sorption of the obtained composite and increases its mechanical properties.




Mild Acidic Treatment; Moisture Sorption; Wettability; Wood-Polymer Composite; Wood Residue


[1]     D. Klemm, B. Heublein, H. P. Fink and A. Bohn, “Cellulose: Fascinating biopolymer and sustainable raw material,” Angew. Chem., Int. Ed., vol. 44, 2005, pp. 3358-3393.

[2]     A. K. Mohanty, M. Misra and L. T. Drzal, “Sustainable Bio-Composites from renewable resources: Opportunities and challanges in the green materials world,” J. Polym. Environ., vol. 10, 2002,  pp. 19-26.

[3]     M. Carus, A. Eder, L. Dammer, H. Korte, L. Scholz, R. Essel and E. Breitmayer, “Wood plastic composites (WPC) and natural fibre composites (NFC): European and Global markets 2012 and future trends,” 2014. [Online]. Available: www.bio-based.eu/markets [Accessed: Feb. 18, 2017].

[4]     M. N. Rao, R. Sultana and S. H. Kota, Solid and Hazardous waste management. Joe Hayton, 2017

[5]     C. M. Popescu, “A near infrared spectroscopic study of the structural modifications of lime (Tilia CordataMill.) wood during hydro-thermal treatment,” Spectrochim. Acta. A. Mol. Biomol. Spectrosc., vol. 115, 2013, pp. 227-233.

[6]     J. O. Nwadiogbu, P. A. C. Okoye, V. I. Ajiwe and N. J. N. Nnaji, “Hydrophobic treatment of corn cob by acetylation: Kinetics and thermodynamics studies,” J. Environ. Chem. Eng., vol. 2, 2014, pp. 1699-1704.

[7]     W. Z. W. Zahari, R. N. R. L. Badri, H. Ardyananta, D. Kurniawan and F. M. Nor, “Mechanical Properties and Water Absorption Behavior of Polypropylene / Ijuk Fiber Composite by Using Silane Treatment,” Proc. Manuf., vol. 2, 2015, pp. 573-57.

[8]     G. Shulga, J. Jaunslavietis, J. Ozolins, B. Neiberte, A. Verovkins, S. Vitolina and V. Shakels, “Properties of Recycled Polypropylene Based Composites Incorporating Treated Hardwood Sawdust,” AIP Conference Proceedings of the 8th International Conference “Times of Polymers (TOP) & Composites. From Aerospace to Nanotechnology.” Ed. A. D’Amore, D. Acierno and L.Grassia. vol. 1736, 020111 (2016); http://dx.doi.org/10.1063/1/1/4949686.

[9]     G. Shulga, B. Neiberte, A. Verovkins, S. Vitolina, J. Jaunslavietis, J. Ozolins, “Short fibre filler from wood residue for polymer composite materials,” Material Science, vol. 22, 2016, pp. 370-375,

[10]  W. Deng, Y. Song, Q. Wang and W. Wang, “Improvement of compatibility and mechanical properties of modified wood fiber/polypropylene composites”, Frontiers of Foresty in China, vol. 3,  2008, pp. 243-247.

[11]  D. Ndiaye and A. Tidjani, “Effects of coupling agents on thermal behaviour and mechanical properties of wood flour/polypropylene composites,” J. Composite Materials, vol. 46, no. 24, 2012. pp.3067-3075.

[12]  A.W. Adamson and A. P. Gast, Physical Chemistry of Surfaces. New York: John Wiley & Sons, 1997.

ERDF co-funded project "Funding of international projects in research and innovation at Rezekne Academy of Technologies" No.