Studies on laminated and scrimber composites produced from thermally modified D. strictus bamboo bonded with melamine-based adhesive

Shukla, S. R.; Kelkar, Bhushan U.; Yadav, S.M.; Bijila, A.

doi:10.1016/j.indcrop.2022.115649

Cited by 19 publications

(3 citation statements)

References 53 publications

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“…However, the smaller diameters and hollowness of bamboo have limited its use in the creation of sheets for decoration or as a load-bearing material for structural applications in building and construction [ 2 ]. To overcome this limitation, bamboo stems can be processed into bamboo strips, bamboo bundles, bamboo fiber mats, bamboo shavings, or bamboo fibers, and reconstituted to fabricate bamboo composites, such as bamboo plywood, laminated bamboo lumber, bamboo-scrimber composites, bamboo particleboards, and bamboo fiberboards [ 3 , 4 ]. In particular, bamboo scrimber is a type of high-performance, bamboo-based, reconstituted material with controllable performance and adjustable specifications and design structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Furfurylation on Bamboo-Scrimber Composites

Xie

et al. 2023

Materials

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Bamboo is a material with excellent development prospects. It is increasingly used in furniture, decoration, building, and bridge construction. In this study, Furfurylated bamboo bundles and phenol-formaldehyde resin were used to make bamboo-scrimber composites (BSCs) via molding-recombination and hot-pressing processes. The effects of the impregnation mode, furfuryl-alcohol concentration, and curing temperature on the various physical–mechanical properties and durability of the composites were evaluated. Scanning-electron microscopy (SEM) was used to observe the microstructural differences. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) were employed to investigate changes in the chemical constituents. The heat resistance was also investigated using thermogravimetric analysis. The results showed that the density of the furfurylated BSC increased by up to 22% compared with that of the BSC-C with the same paving mode. The furfurylated BSCs had lower moisture contents: the average moisture content of the furfurylated BSCs was 25~50% lower than that of the BSC-C. In addition, the furfurylated BSCs showed better dimensional stability and durability, since the decay-resistance grade of the BSCs was raised from decay resistance (class II) to strong decay resistance (class I). In terms of the mechanical properties, the furfurylation had a slight negative effect on the mechanical strength of the BSCs, and the modulus of rupture (MOR) and horizontal shear strength (HSS) of the BSCs were increased to a certain extent under most of the treatment conditions. In particular, the highest HSS for indoor use and MOR of the furfurylated BSCs increased by 21% and 9% compared with those of the untreated BSCs, respectively. The SEM results indicated that the FA resin effectively filled in the bamboo-cell cavities and vessels, and the modified bamboo-parenchyma cells were compressed more tightly and evenly. The FTIR and XPS spectroscopy showed that the hydroxyl group of carboxylic acid of the bamboo-cell-wall component reacted with that of the furan ring, and the cellulose and hemicellulose underwent acid hydrolysis to a certain extent after the furfurylation. Overall, the present study highlights the potential of furfurylation as a modification method to enhance BSC products. Further research should focus on improving the ability of furfurylated BSCs to prevent the growth of Botryodiplodia theobromae. Additionally, the influence of furfuryl-alcohol resin on the bonding strengths of PF adhesives should be further clarified.

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Section: Introductionmentioning

confidence: 99%

Effect of Furfurylation on Bamboo-Scrimber Composites

Xie

et al. 2023

Materials

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“…Materials 2023, 16, 4880 2 of 13 He and Evans et al [19] conducted tests on birch single-layer boards to assess their type I fracture performance. They improved the fracture toughness of birch composites by reinforcing the adhesive and incorporating glass fiber adhesive.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, there has been some progress in exploring the mechanical properties of bamboo scrimber [ 11 , 12 , 13 ]. However, the majority of research on bamboo scrimber has focused on its fundamental mechanical properties [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Fracture Toughness of Bamboo Scrimber

Zhang

Hou

et al. 2023

Materials

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In the past decade, bamboo scrimber has developed rapidly in the field of building materials due to its excellent mechanical properties, such as high toughness and high tensile strength. However, when the applied stress exceeds the ultimate strength limit of bamboo scrimber, cracks occur, which affects the performance of bamboo scrimber in structural applications. Due to the propensity of cracks to propagate, it reduces the load-bearing capacity of the bamboo scrimber material. Therefore, research on the fracture toughness of bamboo scrimber contributes to determining the material’s load-bearing capacity and failure mechanisms, enabling its widespread application in engineering failure analysis. The fracture toughness of bamboo scrimber was studied via the single-edge notched beam (SENB) experiment and compact compression (CC) method. Nine groups of longitudinal and transverse samples were selected for experimental investigation. The fracture toughness of longitudinal bamboo scrimber under tensile and compressive loadings was 3.59 MPa·m1/2 and 2.39 MPa·m1/2, respectively. In addition, the fracture toughness of transverse bamboo scrimber under tensile and compressive conditions was 0.38 MPa·m1/2 and 1.79 MPa·m1/2, respectively. The results show that, for this material, there was a significant distinction between longitudinal and transverse. Subsequently, three-point bending tests and simulations were studied. The results show that the failure mode and the force–displacement curve of the numerical simulation were highly consistent compared with the experimental results. It could verify the correctness of the test parameters. Finally, the flexural strength of bamboo scrimber was calculated to be as high as 143.16 MPa. This paper provides data accumulation for the numerical simulation of bamboo scrimber, which can further promote the development of bamboo scrimber parameters in all aspects of the application.

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