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.

中文翻译：

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设计竹纤维的表面特性以增强粘合性能

竹纤维的粘合能力对其在大型工程结构中的应用至关重要。制作具有不同砂眼和密度的冷压竹纤维，然后与聚氨酯树脂粘合。粘合剂集中在表面上，有助于锚固到材料表面。研究剪切强度和浸没剥离强度作为确定胶水质量的参数。使用 120 号砂纸和 1.15 g/cm ³的密度获得最佳粘合特性。结果表明，在密度为 1.15 g/cm ³，胶合特性最初上升，随后随着打磨目数的增加而下降。当使用 120 目砂光时，粘合强度随着密度的增加而提高。随着密度的增加，材料内部的竹纤维分布更加紧密，而树脂的分散更加均匀。因此，降低了表面孔隙率和粗糙度。