Investigation on the functional properties of wood-plastic composite prepared from black liquor powder obtained from alkali sulfite-anthraquinone (AS-AQ) pulping process with wheat straw

Document Type : Research Paper

Authors

1 M.Sc. Graduate, Department of Wood and Paper Science and Engineering, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad, I.R. Iran

2 Assoc. Prof., Department of Wood and Paper Science and Engineering, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad, I.R. Iran

3 Assist. Prof., Department of Wood and Paper Science and Engineering, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad, I.R. Iran

4 Assoc. Prof., Department of Wood and Paper Science and Engineering, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran

Abstract

Development and application of natural and renewable resources in the manufacture of wood composites is one of the important issues that are always considered by various researchers and are looking for solutions to reduce the share of harmful and hazardous chemical compounds. Therefore the aim of this study was to investigate the use of black liquor powder obtained from alkali sulfite anthraquinone pulping process in the production of wood plastic composite with wheat straw residue and polypropylene polymer and using MAPP coupling agent. In order to make  the wood plastic composites, wheat straw flour enhancer in three levels of 30, 40 and 50% and black liquor powder obtained from alkaline sulfite anthraquinone (AS-AQ) pulping process in four levels of zero, 5, 10 and 15%  relative to dry weight of wheat flour was used. Then the flexural strength and modulus, tensile strength and modulus, impact resistance and thickness swelling within 2 and 24 hours immersion in water of the test specimens prepared from the wood plastic composites were measured and statistically analyzed. The results showed that by using liqueur powder obtained from alkali sulfate-anthraquinone process with wheat straw flour, the flexural strength increased about 50% compared to pure propylene. The flexural and tensile modulus and impact resistance of the composites approximately 100% compared to pure polymer. The thickness swelling of the composites also increased with increasing the amount of black liquor powder and wheat straw. In general, the results showed that replacing the black liquor powder with a part of wheat straw flour not only did not lead to significant negative changes in the properties of wood plastic composites but also improved some mechanical properties.

Keywords


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