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Abstract：
Polyethylene terephthalate (PET) recycling is one of the most important environmental issues, assuring a cleaner environment and reducing the carbon footprint of technological products, taking into account the quantities used year by year. The recycling possibilities depend on the quality of the collected material and on the targeted product. Current research aims to increase recycling quantities by putting together recycled PET in an innovative way as a filler for the additive manufactured metallic lattice structure. Starting from the structures mentioned above, a new range of composite materials was created: IPC (interpenetrating phase composites), materials with a complex architecture in which a solid phase, the reinforcement, is uniquely combined with the other phase, heated to the temperature of melting. The lattice structure was modeled by the intersection of two rings using Solid Works, which generates the lattice structure, which was further produced by an additive manufacturing technique from 316L stainless steel. The compressive strength shows low values for recycled PET, of about 26 MPa, while the stainless-steel lattice structure has about 47 MPa. Recycled PET molding into the lattice structure increases its compressive strength at 53 MPa. The Young\'s moduli are influenced by the recycled PET reinforcement by an increase from about 1400 MPa for the bare lattice structure to about 1750 MPa for the reinforced structure. This sustains the idea that recycled PET improves the composite elastic behavior due to its superior Young\'s modulus of about 1570 MPa, acting synergically with the stainless-steel lattice structure. The morphology was investigated with SEM microscopy, revealing the binding ability of recycled PET to the 316L surface, assuring a coherent composite. The failure was also investigated using SEM microscopy, revealing that the microstructural unevenness may act as a local tensor, which promotes the interfacial failure within local de-laminations that weakens the composite, which finally breaks.
摘要：
聚对苯二甲酸乙二醇酯(PET)的回收利用是最重要的环境问题之一,确保更清洁的环境，减少技术产品的碳足迹，考虑到逐年使用的数量。回收的可能性取决于收集的材料的质量和目标产品。当前的研究旨在通过以创新的方式将回收的PET放在一起作为添加剂制造的金属晶格结构的填料来增加回收量。从上面提到的结构开始，创造了一系列新的复合材料：IPC(互穿相复合材料)，具有复杂结构的材料，其中固相，加固，与另一个阶段唯一地结合在一起，加热到熔化的温度。使用SolidWorks通过两个环的交点对晶格结构进行建模，产生晶格结构，由316L不锈钢通过增材制造技术进一步生产。压缩强度显示低值的回收PET，约26兆帕，而不锈钢晶格结构约为47MPa。再循环的PET模制到晶格结构中增加了其在53MPa下的压缩强度。杨氏模量受回收PET增强的影响，从裸露晶格结构的约1400MPa增加到增强结构的约1750MPa。这维持了这样的想法，即回收的PET由于其优异的杨氏模量约为1570MPa而改善了复合材料的弹性行为，与不锈钢晶格结构协同作用。用SEM显微镜研究了形态学，揭示了回收PET与316L表面的结合能力，确保连贯的复合材料。还使用SEM显微镜研究了故障，揭示了微观结构的不均匀性可以作为局部张量，这促进了局部去层内的界面破坏，从而削弱了复合材料，它终于打破了。
