Engineering the surface properties of bamboo scrimber to enhance the gluing properties

Abstract

The adhesive ability of bamboo scrimber is critical for its use in large‐scale engineering structures. Cold‐pressed bamboo scrimber with varying sanding mesh and density was made and then bonded with polyurethane resin. The adhesive was concentrated on the surface, assisting the anchoring into the material surface. The shear strength and immersion peel strength are studied as parameters to determine the glue qualities. The optimum gluing characteristics were obtained using a 120 grit sandpaper and a density of 1.15 g/cm3. The results indicated that at a density of 1.15 g/cm3, the gluing characteristics rose initially and subsequently dropped as the number of sanding meshes increased. The bonding strength improved with increasing density when 120‐mesh sanding was used. With increasing density, the bamboo fiber distribution inside the material got more compact, while the resin dispersion became more uniform. Thus, the surface porosity and roughness were decreased.

Manufacturing and Characterization of Wide-Bundle Bamboo Scrimber: A Comparison with Other Engineered Bamboo Composites

“…WBS has much wider fiberized strips of up to 250 mm, whereas traditional and narrow bamboo scrimber strips are between 30 and 60 mm wide. Narrow BS is characterized by variability in planar panel density caused by poorly controlled mat lay-up which creates overlaps and gaps requiring very high compaction pressures to achieve adequate contact and bonding of elements [ 19 , 33 , 34 , 35 ]. WBS allows for more controlled mat lay-up—an intermediary between haphazardly-laid traditional BS and well-aligned bamboo bundle LVL (see Figure 2 ).…”

“…The fabrication process consists of cold molding and hot curing, or, for panels, of a lengthy cool-in and cool-out pressing procedure. Products range in density from about 0.85 to 1.25 g/cm 3 , with high variability in mechanical properties [ 17 , 18 , 19 ]. Many studies have investigated in depth the mechanical properties [ 20 , 21 , 22 , 23 ], flame retardant properties [ 24 ], dying properties [ 25 ], anticorrosion and antimildew properties [ 26 ], and supplementary element heat treatments for bamboo scrimber [ 27 ].…”

Study on Preparation Optimization Technology and Surface Properties of Decorated Bamboo Filament Board

“…Bamboo is a hydrophilic biomass material; therefore, the BDF board has a hygroscopic property in application [30]. Its surface wettability is determined by changes in its chemical composition and is usually expressed in terms of the contact angle.…”