Kabir Shahbaj, Lee Sunhee
Department of Fashion and Textiles, Dong-A University, Busan 49315, Korea.
Department of Fashion Design, Dong-A University, Busan 49315, Korea.
Polymers (Basel). 2020 Jul 18;12(7):1600. doi: 10.3390/polym12071600.
This study evaluated the shape memory and tensile property of 3D-printed sinusoidal sample/nylon composite for various thickness and cycles. Sinusoidal pattern of five thicknesses: 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, and 1.0 mm were 3D-printed on nylon fabric by the fused deposition modeling (FDM) 3D printer using shape memory thermoplastic polyurethane (SMTPU). Afterward, shape memory and tensile property was investigated up to 50 shape memory cycles. The study found that 3D-printed sinusoidal sample/nylon composite had a 100% shape recovery ratio for various thicknesses up to 50 cycles. The average shape recovery rate gradually decreased from 3.0°/s to 0.7°/s whereas the response time gradually increased with the increase of a 3D-printed pattern thickness. The stress and initial modulus gradually increased with the increase of the cycle's number. Thus, the shape memory property had a similar tendency for various cycles whereas the tensile property gradually increased with the increase of the cycle number. Moreover, this study demonstrated that this 3D-printed sinusoidal sample/nylon composite can go through more than 50 cycles without losing its tensile or shape memory property. This 3D-printed sinusoidal sample/nylon composite has vast potential as smart, reinforced, and protective clothing that requires complex three-dimensional shapes.
本研究评估了3D打印正弦波样品/尼龙复合材料在不同厚度和循环次数下的形状记忆和拉伸性能。使用形状记忆热塑性聚氨酯（SMTPU），通过熔融沉积建模（FDM）3D打印机在尼龙织物上3D打印出五种厚度（0.2毫米、0.4毫米、0.6毫米、0.8毫米和1.0毫米）的正弦波图案。之后，对高达50个形状记忆循环的形状记忆和拉伸性能进行了研究。研究发现，3D打印正弦波样品/尼龙复合材料在高达50个循环的不同厚度下具有100%的形状恢复率。平均形状恢复速率从3.0°/秒逐渐降至0.7°/秒，而响应时间随着3D打印图案厚度的增加而逐渐增加。应力和初始模量随着循环次数的增加而逐渐增加。因此，不同循环次数下形状记忆性能具有相似的趋势，而拉伸性能随着循环次数的增加而逐渐增强。此外，本研究表明，这种3D打印正弦波样品/尼龙复合材料可以经历超过50个循环而不丧失其拉伸或形状记忆性能。这种3D打印正弦波样品/尼龙复合材料作为需要复杂三维形状的智能、增强和防护服具有巨大潜力。
