Laminating wood fiber mats into a densified material with high performance

Wei, Jinguang; Rao, Fei; Zhang, Yahui; Yu, Wenji; Hse, Chung Y.; Shupe, Todd F.

doi:10.1016/j.matlet.2019.06.097

Cited by 16 publications

(13 citation statements)

References 13 publications

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“…The bending strength and modulus of a bamboo laminated composite (BLC) with a density of 1.09 g/cm 3 were found to reach 253.23 MPa and 26.35 GPa, respectively, and more importantly, the utilization rate of the Moso bamboo in this BLC was as high as 92.54% [1]. Furthermore, the water resistance of the BLC was observed to improve as its resin solid content and density increased [7].…”

Section: Introductionmentioning

confidence: 96%

“…In recent years, novel high-performance wood/bamboo-based composites with textures and colors similar to those of wood or bamboo have accordingly been fabricated using mechanical fluffing of wood veneer or bamboo culm, followed by resin impregnation, lamination, and molding recombination [1,2]. The bending, compressive, and shear strengths of a Radiata pine wood laminated composite (WLC) were found to be 308.11 MPa, 173.56 MPa, and 28.43 MPa, respectively, or approximately 2.3-4.0 times those of natural wood [3]. Furthermore, compared with a traditional poplar WLC fabricated using veneers without fluffing, a novel WLC constructed using fluffed veneers exhibited a slight decline in mechanical strength but significantly improved dimensional stability [4].…”

Section: Introductionmentioning

confidence: 99%

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Engineered Wood/Bamboo Laminated Composites for Outdoor Hydrophilic Platforms: Structural Design and Performance

Ji¹,

Zhang²,

Rao³

2022

Journal of Renewable Materials

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Landscape designers increasingly prefer to use wood/bamboo-based composites for outdoor hydrophilic platforms owing to their natural surface texture, high performance, and sustainability to facilitate extensive interaction between people and water and enable the full range of ecological functions of water resources. In this study, four laminated composite (LC) structures were designed and manufactured using fluffed bamboo and wood veneers. Their surface textures, profile densities, water resistances, and mechanical properties were then evaluated. The type of fluffed veneer of the surface layer determined the texture of the LC surface. The specific structures of fluffed bamboo and wood veneer laminations were found to affect the LC profile density variability, water resistance, and mechanical properties owing to the differences in the strength and interfacial properties of bamboo and wood fibers. Finally, the water resistance and mechanical properties of all four LCs were found to be much higher than the highest level specified in GB/T 20241-2006 for ''laminated veneer lumber'' and GB/T 30364-2013 for "bamboo scrimber flooring", indicating that they are promising materials for structures and flooring, particularly for outdoor hydrophilic platforms.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Engineered Wood/Bamboo Laminated Composites for Outdoor Hydrophilic Platforms: Structural Design and Performance

Ji¹,

Zhang²,

Rao³

2022

Journal of Renewable Materials

Self Cite

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“…However, compared with metals, concrete, and composite materials, the mechanical properties (strength and toughness) of natural wood are not ideal in many advanced engineering structures and applications. A large number of studies on improving the comprehensive properties of wood pointed out − including chemical treatment of most lignin and hemicellulose, − densification treatments (hot pressing or impregnation), and heat treatments. , Lignin is removed with an aqueous solution of sodium hydroxide and sodium sulfite, the specific strength of the wood obtained after hot pressing is comparable to that of metal, and it can be used as a bulletproof material. Lignin in the wood is completely removed with an aqueous solution of sodium chlorite, and then the resin is impregnated to obtain a transparent wood that can replace glass.…”

Section: Introductionmentioning

confidence: 99%

Lightweight, High-Strength Wood Prepared by Deep Eutectic Solvent Treatment as a Green Structural Material

Fan

Sun

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Wood is a green, environmentally sustainable, high-performance structural material that is an attractive candidate to replace nonenvironmental structural materials. However, the mechanical performance of natural wood is generally insufficient in many advanced engineering structures and applications. Herein, we report a simple and effective strategy in a new type of green-enhanced wood development to synthesize a high mechanical biomass structure material from renewable wood resources. In this process, the lignin of the natural wood is partially removed, and the hard cell walls become pliable and easy to handle. After treatment, the wood fiber structure is preserved, and the wood fibers are closely arranged after densification, which shows the reinforced wood with high mechanical properties. The resulting reinforced wood is 8 times stronger than the starting wood and comparable to widely used structure materials such as concrete, stainless steel, aluminum alloy, and magnesium alloy. This method of manufacturing reinforced wood with green, rich, and renewable natural wood is extremely attractive for the sustainable development of engineering structural materials, which broadens the potential of wood as structural materials.

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“…Therefore, it is urgent and critical to developing high-performance materials with excellent mechanical properties, as well as a short curing time. Indeed, phenol-formaldehyde (PF) resin has been widely used as laminate adhesive attributing to its desirable characteristics, such as rapidly heat curing, [22] and strong adhesive properties. [23,24] Hence, based on the above, we developed a facile and efficient approach to fabricate high-strength delignified wood-based laminated composites (DWLCs) via delignified wood veneer percolated with different contents of PF resin, followed by densification.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is urgent and critical to developing high‐performance materials with excellent mechanical properties, as well as a short curing time. Indeed, phenol‐formaldehyde (PF) resin has been widely used as laminate adhesive attributing to its desirable characteristics, such as rapidly heat curing, [ 22 ] and strong adhesive properties. [ 23,24 ]…”

Section: Introductionmentioning

confidence: 99%

High‐strength wood‐based composites via laminated delignified wood veneers with different adhesive contents for structural applications

2022

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The processing of natural wood into a high‐performance wood‐based composite to broaden the potential applications of wood can be achieved by various techniques using bulk wood as a raw material. However, attention has seldom been paid to the use of wood veneers for preparing high‐performance structural materials. In this study, delignified birch veneers are used as raw materials to fabricate high‐strength delignified wood‐based laminated composites (DWLCs) with phenol‐formaldehyde (PF) resin as adhesive. The DWLCs with a PF resin content of 40% had high mechanical properties and displayed flexural and tensile stress of 405.8 and 324.4 MPa, respectively. The flexural and tensile stress are 1.24 and 1.21 times higher than those of natural wood‐based laminated composites (WLCs). And we confirmed that partial delignification could contribute to enhancing the mechanical properties of high‐strength wood‐based composites. By using scanning electron microscopy (SEM), and energy‐dispersive spectroscopy (EDS), the strengthening mechanisms of the high‐performance DWLCs were investigated. Due to both the surface of the cell lumen and cell walls being filled with PF resin, the wood microstructure was cured under high pressure so that the DWLCs were enhanced.

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Laminating wood fiber mats into a densified material with high performance

Cited by 16 publications

References 13 publications

Engineered Wood/Bamboo Laminated Composites for Outdoor Hydrophilic Platforms: Structural Design and Performance

Engineered Wood/Bamboo Laminated Composites for Outdoor Hydrophilic Platforms: Structural Design and Performance

Lightweight, High-Strength Wood Prepared by Deep Eutectic Solvent Treatment as a Green Structural Material

High‐strength wood‐based composites via laminated delignified wood veneers with different adhesive contents for structural applications

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