Additive Manufacturing with Continuous Ultra-High Molecular Weight Polyethylene Yarn
Additive Manufacturing with Continuous Ultra-High Molecular Weight Polyethylene Yarn
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DOI：
10.1016/j.matdes.2023.112411
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发表时间：
2023-10
期刊：
影响因子：
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通讯作者：
Colin Marquis;Renjie Song;Sarah Waddell;Andy Luong;Dwayne Arola
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文献类型：
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作者：
Colin Marquis;Renjie Song;Sarah Waddell;Andy Luong;Dwayne Arola
柔性高强度纤维复合材料的熔丝制造（FFF）可以为复杂柔性结构的设计和制造提供更多的机会，但这一主题受到的关注有限。这项研究致力于开发由嵌入聚己内酯（UPE/PCL）基质中的超高分子量聚乙烯纱线（UHMWPE）组成的长丝和成功的3D打印。根据关键参数，包括卷绕速度、温度、纤维分布（固结与分散）和纤维体积分数（4≤ Vf≤ 30%），评价了长丝的物理特性和可印刷性。在加工和印刷后，对UPE/PCL的微观结构和拉伸性能进行评价。在印刷之前，长丝表现出590±40 MPa的极限拉伸强度（UTS）和2.4 GPa的表观纤维强度。对于印刷条件，UTS达到470±60 MPa，表观纤维强度为1.9 GPa。长丝中的纤维分散对打印性能和纤维降解的可能性起着重要作用。然而，UPE/PCL的强度代表了FFF打印的顺应性复合材料的新性能基准。这种新材料系统可以支持除了灵活性之外，强度和韧性是关键性能指标的应用。
Fused filament fabrication (FFF) of composites with compliant high-strength fibers could expand opportunities for the design and fabrication of complex flexible structures, but this topic has received limited attention. This study pursued the development of filaments consisting of ultra-high molecular weight polyethylene yarn (UHMWPE) embedded in a matrix of polycaprolactone (UPE/PCL) and successful 3D printing. The physical characteristics and printability of the filament were evaluated in terms of key parameters including spooling speed, temperature, fiber distribution (consolidated vs dispersed), and fiber volume fraction (4≤ Vf≤30 %). An evaluation of the microstructure and tensile properties of the UPE/PCL was performed after processing and printing. Prior to printing, the filament exhibited an ultimate tensile strength (UTS) of 590±40 MPa with apparent fiber strength of 2.4 GPa. For the printed condition, the UTS reached 470±60 MPa and apparent fiber strength of 1.9 GPa. Fiber dispersion in the filament plays an important role on the printed properties and the potential for fiber degradation. Nevertheless, the strength of the UPE/PCL represents a new performance benchmark for compliant composites printed by FFF. This new material system can support applications where strength and toughness are key performance metrics in addition to flexibility.