A novel process to improve yield and mechanical performance of bamboo fiber reinforced composite via mechanical treatments

Preparation and Characterization of Outdoor Bamboo-Fiber-Reinforced Composites with Different Densities

“…The WAR values of the pristine samples and naturally weathered samples with a density of 1.20 g/cm 3 were approximately half of the samples with a density of 0.90 g/cm 3 after being immersed in water for 96 h at 63 °C, while the VSE values of the former were 1.9 and 2.0 times higher, respectively. In high-density composites with a compact internal structure, the pores are smaller and more dotted and/or linear cracks are blocked by adhesive (Yu et al 2014) because the water cannot easily penetrate the material. The thickness swelling rate (TSR) of wood/bamboo-based reconstituted composites makes the largest contribution to the VSE Zhu and Yu 2010;Bao et al 2016).…”

“…The MOR and MOE values increased with the density from 132.53 MPa (sample Ao, 0.90 g/cm 3 ) to 170.51 MPa (sample Do, 1.20 g/cm 3 ) and from 11.13609 GPa (sample Ao, 0.90 g/cm 3 ) to 13.10105 GPa (sample Do, 1.20 g/cm 3 ). Cracks were found in the OBFMs on the inner and outer cylinder walls of the bamboo tubes and, in particular, linear ones with an average depth of 800 m and width of 30 to 300 m, contribute to the strength of OBFRCs by allowing adhesives to penetrate and the internal stress of the inner cylinder walls to be released (Yu et al 2014). These results can be explained by the fact that higher-density composites have a greater amount of polymers per unit volume, due to there being a greater contact between plies after the hot-pressing process, in contrast to lower-density boards (Zhu and Yu 2010; Jeang-Kwan and Jong-Bum 2009).…”

“…Technologies for fabricating high-performance bamboo-fiber-reinforced composites (BFRCs) help overcome the inherent defects of bamboo, such as its small diameter and thin walls. Processes for making BFRCs can also improve the bonding between the outer and inner bamboo culms and improve the utilization of bamboo veneer for panel production (Yu et al 2014;Zhu et al 2015). The next step in the development of BFRCs is to improve their outdoor performance, which will ease the demand for wood resources and take advantage of the availability of bamboo.…”

Mode II Fracture Toughness of Bamboo Scrimber with Compact Shear Specimen

“…The manufacturing process of bamboo scrimber is relatively simple in comparison to other bamboo-based composites because the inner and outer layers of the bamboo do not need to be removed, and chemical treatment of the raw materials is not required, either. The bamboo scrimber has great potential to be used as a construction material due to its high manufacturing efficiency, material utilization rate, and good mechanical properties (Yu et al 2014). The effect of the manufacturing process on the mechanical performance of bamboo scrimber was investigated (Yu et al 2006;Zhu et al 2011).…”

Experimental Study on Tensile and Compressive Strength of Bamboo Scrimber

“…The manufacturing process, mechanical behavior, and performance of laminated bamboo lumber have been previously studied (Obataya et al 2007;Shao et al 2010;Zhu et al 2011). Aimed at higher efficiency and mechanical performance of bamboo-based composite material, a new product of bamboo scrimber has been explored, of which the hot-press technology, glue immersion, and process parameters were studied (Zhang et al 2008;Wang et al 2013;Yu et al 2014). In a previous study, the tensile strength and compressive strength parallel to grain of bamboo scrimber manufactured with Sinocalamus affinis were about 1.0 times higher than those of wood (Gao et al 2008;Zhang et al 2012).…”