工艺与制造英文2022被引 7
真空辅助树脂传递模塑工艺制备的竹纤维织物增强聚合物的物理力学性能
Physical-Mechanical Properties of Bamboo-Textile-Reinforced Polymer Made with Vacuum-Assist Resin Transfer Molding
Chun‐Wei Chang, Feng‐Cheng Chang · National Taiwan University
摘要整理
竹纤维增强聚合物作为天然纤维复合材料已被广泛研究。本研究采用真空辅助树脂传递模塑（VA-RTM）工艺，以编织竹条和环氧树脂为原料制备了连续竹纤维织物增强聚合物（BTRP）复合材料。对不同织物结构、铺层序列、加载方向和层数的BTRP试样的物理性能（包括体积密度和平衡含水率）进行了初步评估。同时检测了试样的弯曲性能，包括强度、模量、完整的载荷-挠度曲线、损伤参数和断口形貌特征。研究表明，随着层数增加，弯曲强度下降，但模量值增加。在层数相同的条件下，平纹编织BTRP试样的强度和模量略高于斜纹编织试样。BTRP试样表现出显著的力学性能和层板材料特有的分阶段失效行为。试样在达到极限载荷前刚度衰减，这归因于微观界面损伤，不同的织物结构影响试样的断裂模式。试样的逐级多阶段失效模式表明该复合材料具有相对较好的使用安全性。研究结果表明，所制备的复合材料兼具VA-RTM工艺和连续无捻竹条的优势，具有可观的商业应用潜力。
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