Water Uptake Behavior of Injection-Molded Wood–Plastic Composites

Author:

Burgstaller Christoph12ORCID,Renner Károly3ORCID

Affiliation:

1. Transfercenter für Kunststofftechnik GmbH, Franz-Fritsch-Str. 11, 4600 Wels, Austria

2. School of Engineering, University of Applied Sciences Upper Austria, Stelzhamerstraße 23, 4600 Wels, Austria

3. Furukawa Electric Institute of Technology Ltd., Késmárk u. 28/a, H-1158 Budapest, Hungary

Abstract

Wood–plastic composites (WPC) are partially biobased composite materials that exhibit appealing properties, but also some drawbacks. One is the inherent propensity to take up water, which influences different composite properties. In this work, we investigated the general water uptake behavior of injection-molded WPC and applied a simple model to evaluate different formulations. We found that the major influence is the wood content, but also, wood particle size showed a distinct influence on the water uptake speed, while the saturation concentration correlated with the equilibrium moisture content of the wood. The mechanical properties, such as elastic modulus and tensile strength, were reduced with increasing water uptake, and the reduction correlated with wood content and the moisture content of the wood, while the particle size did not show an influence in the investigated region.

Funder

Upper Austrian government

Publisher

MDPI AG

Reference23 articles.

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