关于湿度对3D打印机械元材料机械性能影响的实验研究
Qian Sun1, Xiaojun Tan1, Jianhao Man2
1School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China.
Polymers
|November 13, 2025
概括
这项研究研究了湿度如何影响3D打印的聚合物和元材料. 高湿度显著改变材料特性,影响其在生物医学植入物等应用中的使用.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 聚合物科学 聚合物科学
背景情况:
- 化丝制造 (FFF) 聚合物越来越多地用于先进的应用.
- 了解材料在湿度等环境条件下的行为对于可靠的性能至关重要.
- 机械超材料具有可调节的特性,但需要在不同的环境中进行表征.
研究的目的:
- 研究相对湿度 (RH) 的变化对常见FFF聚合物的拉伸性能的影响.
- 评估不同相对密度 (RD) 和RH水平的3D打印机械元材料的压缩行为.
- 确定导致材料机械反应发生显著变化的关键RH值,特别是Poisson比.
主要方法:
- 六种FFF聚合物 (PEEK,PLA,PETG,ABS,尼龙,TPU) 在15%,45%和95%的RH条件下进行处理.
- 进行了拉力测试,以测量扬模量,最大应变和最终拉力强度.
- 对元材料样本 (25%,35%,45% RD) 的压缩试验在相同的RH水平上进行,以评估刚度,强度和Poisson比率.
主要成果:
- 聚合物中的吸水率各不相同,尼龙的吸水率最高,PEEK/TPU的吸水率最低.
- 拉力和压力性能都显示出随着RD和RH的变化显著的变化.
- 波桑比率在低至中等RH时仍然可预测,但在高RH (95%) 时呈现急剧变化.
结论:
- 相对湿度显著影响3D打印聚合物和元材料的机械性能.
- 高湿度作为一个关键值,导致材料行为不可预测的变化,特别是波桑比率.
- 这些发现为验证3D打印元材料在潮湿环境中的使用提供了重要的数据,包括潜在的生物医学应用.
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