A Review on Flexural Properties of Wood-Plastic Composites

Abstract

Wood–plastic composite (WPC) is a kind of composite material that is made of plastic and wood fiber or wood powder. Because it is mothproof, is resistant to corrosion, and has plasticity, among other advantages, it has been researched and used increasingly in building materials. The flexural property of WPC is an important subject in evaluating its mechanical properties. In this paper, wood–plastic raw materials and processing technology are introduced; the internal and external factors of WPC which affect the flexural properties are analyzed; the different ways of enhancing the bending capacity, including the surface pretreatment, addition of different modifiers (compatibility agent and coupling agent) etc. are summarized; and the methods of operation and strengthening effect are analyzed. This work provides a reference for further research in related fields.

Superparamagnetic wood‐polypropylene nanocomposite made using magnetic wood flour with a nanoparticle‐free surface

“…Consequently, the weight fraction of the coupling agent for each filler particle decreases, limiting the development of the filler-matrix interface. 52,53 Contrary to expectations, changing the order of the two processes of in situ synthesis of magnetic nanoparticles and wood grinding did not show significant effects on the tensile and flexural strength of the samples in most cases (Figure 4a,c). The tensile and flexural modulus of the specimens were significantly influenced by the filler type (FFMWF or LFMWF) compared with the strength (Figure 4b,d).…”

“…This observation can be explained by the fact that the specific surface area of the filler phase increases with decreasing particle size. Consequently, the weight fraction of the coupling agent for each filler particle decreases, limiting the development of the filler‐matrix interface 52,53 . Contrary to expectations, changing the order of the two processes of in situ synthesis of magnetic nanoparticles and wood grinding did not show significant effects on the tensile and flexural strength of the samples in most cases (Figure 4a,c).…”

“…Since magnetic nanoparticles and poplar wood flour have a considerable density difference (about 1200%), increasing or decreasing the proportion of magnetic nanoparticles significantly impacts the filler phase's density. Typically, WPC is made by combining components based on their weight ratio 53 . Due to the higher density of FFMWF than LFMWF, the number of particles in the LFMWF filler phase is higher than that of FFMWF for the same weight ratio and particle size.…”

“…Typically, WPC is made by combining components based on their weight ratio. 53 Due to the higher density of FFMWF than LFMWF, the number of particles in the LFMWF filler phase is higher than that of FFMWF for the same weight ratio and particle size. The reduction in the number of particles in the filler phase increases the proportion of individual filler particles from the matrix phase and coupling agent, which improves the filler-matrix interaction and stress transfer at the interface.…”

Lateral Performance for Wood-Frame Shear Walls–A Critical Review

“…Since the concept of sustainable development is increasingly being advocated, and environmental protection awareness is highly enhanced [1][2][3][4], green building materials represented by wood have attracted extensive attention. Wood is a naturally growing, renewable and organic material whose mechanical properties, such as strength and elastic modulus, can meet the needs of structural use, so wood has been widely used in various structural systems.…”