Effect of alkali treatment on water absorption deterioration and mechanism of wheat straw/PVC composites

In order to study the possible negative effects of alkali treatment on the properties of wheat straw/PVC composites under water exposure environment, the water absorption deterioration test of wheat straw/PVC composites prepared by wheat straw with different concentrations of alkali treatment was carried out, and the water absorption behavior and deterioration mechanism of the composites were revealed. The results showed that alkali treatment increased the water absorption of the composites and led to more serious deterioration of the properties of the composites than untreated composites with the continuous immersion in the water exposure environment. In this paper, the possible negative effects of water absorption deterioration of alkali treatment reinforced wood-plastic composites were studied innovatively, it was considered that alkali treatment as a commonly used chemical treatment method should fully consider the negative effects of material types and use environment on its strengthening effect, and the research results can provide theoretical reference for the performance improvement of follow-up composites in water exposure environment.