A review of coextruded wood–plastic composites

Wang, Huanbo; Zhang, Xuefeng; Guo, Shiyu; Liu, Tian

doi:10.1002/pc.26189

Cited by 30 publications

(18 citation statements)

References 61 publications

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“…The combination of wood flour and thermoplastics by extrusion or injection methods has become a standard practice. In wood–plastic composites (WPCs) manufactured by these two technologies, thermoplastics serve as a continuous phase, while wood flour is a dispersed phase to provide strength and stiffness [ 41 ]. WPCs can be made into solid products with various shapes, sizes and colors, and their products have been widely used in industry [ 42 ].…”

Section: Processing Technology Of Thermoplastic-bonded Wood-based Panelsmentioning

confidence: 99%

“…Therefore, enhancing the compatibility between thermoplastic and wood raw materials and improving the high-temperature resistance will be the most important work in the future. Multiple review studies related to the improvement of the wood fiber–plastic interfacial interaction have been published [ 41 , 80 , 81 , 82 ]. The most popular and most widely described methods are thermal treatment, plasma treatment, alkali treatment, silanization, acetylation, maleation, acrylation or isocyanate treatment.…”

Section: Technical Problems Of Wood-based Panel Made Of Thermoplastic Resin Adhesivementioning

confidence: 99%

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Research Progress of Wood-Based Panels Made of Thermoplastics as Wood Adhesives

Zhang

Fang

2021

Polymers

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When thermoplastic resins such as polyethylene (PE) and polypropylene (PP) are selected as wood adhesives to bond wood particles (fibers, chips, veneers) by using the hot-pressing technique, the formaldehyde emission issue that has long existed in the wood-based panel industry can be effectively solved. In this study, in general, thermoplastic-bonded wood-based panels presented relatively higher mechanical properties and better water resistance and machinability than the conventional urea–formaldehyde resin-bonded wood-based panels. However, the bonding structure of the wood and thermoplastic materials was unstable at high temperatures. Compared with the wood–plastic composites manufactured by the extruding or injection molding methods, thermoplastic-bonded wood-based panels have the advantages of larger size, a wider raw material range and higher production efficiency. The processing technology, bonding mechanism and the performance of thermoplastic-bonded wood-based panels are comprehensively summarized and reviewed in this paper. Meanwhile, the existing problems of this new kind of panel and their future development trends are also highlighted, which can provide the wood industry with foundations and guidelines for using thermoplastics as environmentally friendly adhesives and effectively solving indoor pollution problems.

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Section: Processing Technology Of Thermoplastic-bonded Wood-based Panelsmentioning

confidence: 99%

Section: Technical Problems Of Wood-based Panel Made Of Thermoplastic Resin Adhesivementioning

confidence: 99%

Research Progress of Wood-Based Panels Made of Thermoplastics as Wood Adhesives

Zhang

Fang

2021

Polymers

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“…Biomass is widely used as a filler in the design and manufacture of polymer composites [7]. A good example is wood plastic composites (WPCs).…”

Section: Introductionmentioning

confidence: 99%

“…WPC has achieved great success in the wood-like materials and synthetic board industry [8][9][10]. With current technology, WPCs are increasingly produced from waste materials and residual products from the wood and agricultural industry rather than raw wood flour, such as sawdust, rice straw flour, and pulping sludge (namely lignified powders and fibers) [7]. WPCs have been widely applied in decking, railing, siding, fences, windows, door frames, and playground equipment [11,12].…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of PLA Composite Enhanced with Biomass Fillers from Herbaceous Plants

Na¹,

Huang²,

Xu³

et al. 2023

Journal of Renewable Materials

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PLA composites containing biomass fillers from the three herbaceous plants such as reed, wheat stalk, and coconut fiber with length and diameter at the scale of several millimeters were prepared without using additives. The reinforcement effect on the properties of PLA/biomass filler composites is investigated. The research results show that the PLA/biomass filler composites exhibit good stiffness, flexural strength, and impact toughness. Among the three kinds of biomass fillers, reed reinforced PLA composites show optimal mechanical properties. When filled with 40%-50% reed, the flexural moduli of the composites are over 7000 MPa. Flexural strength retains at the same level of pure PLA. The notch impact strength reaches to 4.50 ± 0.73 kJ/m 2 , which is 2.06 times higher than that of pure PLA. Furthermore, the introduction of biomass fillers increases the crystallization ability of PLA and does not increase the water absorption of the composites. This research demonstrated that PLA composites prepared with biomass fillers from the herbaceous plants (namely herb plastic composites, HPCs) is a material with good comprehensive mechanical properties while retaining the intrinsic particularity of biological sources.

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“…This type of degradation can occur as a result of va factors, including temperature, air quality, moisture (the polymer matrix does not exclude water interaction), microorganisms, light, high-energy radiation, chemical ag and mechanical stress [6,7]. These factors can decrease the aesthetic quality (discolora and mechanical strength of WPCs [1,8,9]. Moreover, evidence has been seen of the ence of fungal attack on WPC boards that are exposed to natural weathering [10,11] Even taking account of these issues, the current wide use of WPCs, coupled with composite nature, favours the development of research in this area.…”

Section: Introductionmentioning

confidence: 99%

Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene

et al. 2022

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Carbon nanotubes (CNTs) and graphene, with their unique mechanical, electrical, thermal, optical, and wettability properties, are very effective fillers for many types of composites. Recently, a number of studies have shown that CNTs and graphene may be integrated into wood–plastic composites (WPCs) and natural-fibre-reinforced polymer composites (NFPCs) to improve the existing performance of the WPCs/NFPCs as well as enabling their use in completely new areas of engineering. The following review analyses the results of the studies presented to date, from which it can be seen that that inclusion of CNTs/graphene may indeed improve the mechanical properties of the WPCs/NFPCs, while increasing their thermal conductivity, making them electroconductive, more photostable, less sensitive to water absorption, less flammable, and more thermally stable. This study indicates that the composition and methods of manufacturing of hybrid WPCs/NFPCs vary significantly between the samples, with a consequent impact on the level of improvement of specific properties. This review also shows that the incorporation of CNTs/graphene may enable new applications of WPCs/NFPCs, such as solar thermal energy storage devices, electromagnetic shielding, antistatic packaging, sensors, and heaters. Finally, this paper recognises key challenges in the study area, and proposes future work.

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A review of coextruded wood–plastic composites

Cited by 30 publications

References 61 publications

Research Progress of Wood-Based Panels Made of Thermoplastics as Wood Adhesives

Research Progress of Wood-Based Panels Made of Thermoplastics as Wood Adhesives

Structure and Properties of PLA Composite Enhanced with Biomass Fillers from Herbaceous Plants

Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene

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