The aim of this study was to study the mechanical properties of woven bamboo fiber (WBF) reinforced polypropylene (PP) composites. The bamboo fiber mat was constructed manually by hand. The WBF/PP composites were fabricated by thermoforming process. The basic characteristics of the bamboo strips, such as density, cross section, and tensile properties were measured first. The strengths of the bamboo strip in different sizes were measured, and they were around 400 MPa after 5 wt% alkali treatment. The WBF/PP composite with alkali treated bamboo fibers had better tensile strength than that with untreated bamboo fibers. The strength and modulus are about two times larger in longitudinal direction, while they are about the same in the transverse direction. For the hygrothermal aging test, the composites were highly sensitive to moisture, which could degrade the composites mechanical properties. In the bamboo fiber preforming process, the moisture can enhance the formability of the woven bamboo fiber mat and prevent the bamboo fiber to spring back after forming. The experimental results implied that the preforming of the woven bamboo fiber mat into complex shape is feasible under the wet condition.

本研究的目的是研究编织竹纤维 (WBF) 增强聚丙烯 (PP) 复合材料的机械性能。竹纤维垫是手工制作的。WBF/PP 复合材料是通过热成型工艺制造的。首先测量竹条的基本特性，如密度、横截面和拉伸性能。测量了不同尺寸竹条的强度，经5wt%碱处理后强度约为400MPa。碱处理竹纤维的WBF/PP复合材料比未经处理的竹纤维具有更好的拉伸强度。纵向的强度和模量大约是其两倍，而横向的强度和模量大约相同。对于湿热老化试验，复合材料对水分高度敏感，这会降低复合材料的机械性能。在竹纤维预成型过程中，水分可以增强编织竹纤维毡的成型性，防止竹纤维成型后回弹。实验结果表明，在潮湿条件下，将竹纤维编织垫预成型为复杂形状是可行的。