Physical and Mechanical Properties of Composite Materials Based on Cellulose Diacetate
Year: 2025
Type: article
Abstract: Currently, the state of the problem of wood waste use is critical, since traditional methods of its processing do not provide economically justified involvement of the entire volume of waste in industrial production. To solve this problem, it is necessary to find methods for processing wood waste that increase the share of crushed wood used in the production of high-value-added products in demand. The aim of this work has been to study the effect of the content of activated wood particles crushed by a hydrodynamic method on the physical and mechanical properties of wood-polymer composites based on cellulose diacetate. A polymer matrix in the form of cellulose diacetate and wood filler has been obtained in the laboratory from hydrodynamically activated birch sawdust. Composite samples for testing mechanical properties have been produced by injection molding using a vertical injection molding machine. The morphology of the composite surfaces after the tests has been analyzed using electron microscopy. Thermal degradation of cellulose diacetate samples and composites has been assessed using thermogravimetric analysis. Unfilled cellulose diacetate has shown minimal water absorption (about 4 %). The water resistance of the composite samples has decreased with increasing filler content in cellulose diacetate. An increase in the amount of wood filler in the composition to 20 % leads to an increase in the tensile strength and modulus of elasticity to 23.0 MPa and 1.22 GPa, respectively. A further increase in the filler content from 30 to 70 % has reduced these two indicators. With an increase in the filler content from 10 to 70 %, the flexural strength has dropped from 34.4 to 13.6 MPa. An increase in the proportion of wood filler in the composite composition leads to a decrease in its mass loss at high temperatures. Hydrodynamically treated wood particles can be used in the production of composite materials based on cellulose diacetate when added in amounts from 20 to 30 %.
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409445210