3D打印分层rPET/rPETG形状记忆复合材料结构和性能的组合效应
Ștefan Dumitru Sava1, Vasile Ermolai2, Bogdan Pricop1
1Faculty of Materials Science, "Gheorghe Asachi" Technical University of Iași, Blvd. Dimitrie Mangeron 71A, 700050 Iasi, Romania.
Polymers
|February 13, 2026
概括
本研究探讨了3D打印回收PET复合材料中的形状记忆效应. 最佳的3D打印角度和材料比率提高了潜在的低温执行器的形状恢复.
科学领域:
- 材料科学与工程 材料科学与工程
- 聚合物科学 聚合物科学
- 增材制造 增材制造 增材制造
背景情况:
- 在3D打印材料中描述和控制形状记忆效应 (SME) 对高级应用至关重要.
- 回收聚乙烯二甲 (rPET) 和聚乙烯二甲 (rPETG) 为3D打印提供了可持续的选择.
- 了解印刷参数对SME的影响是定制材料性能的关键.
研究的目的:
- 通过3D打印制造的再生聚乙烯二甲酸盐 (rPET) 和聚乙烯二甲酸糖 (rPETG) 的分层复合材料中研究形状记忆效应 (SME).
- 评估不同rPET/rPETG比率和角对中小企业业绩效的影响.
- 探索这些复合材料作为光驱执行元件的潜力.
主要方法:
- 用不同的rPET/rPETG比率 (100:0到0:100) 和光角 (0°和45°) 打印状和"狗骨"样本的3D打印.
- 免费回收的SME实验,差异扫描热量计 (DSC) 和动态机械分析 (DMA) 板状样本.
- 对狗骨样本进行拉伸失效和负载卸载试验,随后进行扫描电子显微镜 (SEM) 破裂表面分析.
主要成果:
- 在0°拉斯特角度打印的样本显示出更大的自由回收SME冲动,最佳的rPET/rPETG比率为40:60,产生最高的存储模量增加 (872 MPa) 和最大值 (1818 MPa).
- 状复合材料在室温曲后加热后显示出额外的形状恢复,导致凸的上表面.
- 0度格标本显示与分层 (SEM) 相关的应力故障高原,而45度格标本显示与裂纹区域的结故障.
结论:
- 3D打印的分层rPET-rPETG复合材料显示出显著的形状记忆特性.
- 打印参数,特别是光角和材料组成,极大地影响了中小企业的业绩和失败机制.
- 这些量身定制的复合材料显示出开发低温执行器执行元件的前景.
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