4D printing of polyurethane paint-based composites
4D printing of polyurethane paint-based composites
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DOI：
10.1080/19475411.2019.1618409
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发表时间：
2019-05-23
影响因子：
3.9
通讯作者：
Lin, Jian
中科院分区：
文献类型：
--
作者：
Su, Jheng-Wun;Gao, Wenxin;Lin, Jian
在最近的研究中，聚氨酯显示出多种特性，使其成为4D打印的优秀候选材料。在这项研究中，我们提出了一种简单而廉价的添加剂方法，通过在涂料中添加羧甲基纤维素（CMC）和氧化硅（SiO2）纳米颗粒来打印水性聚氨酯涂料基复合材料。CMC和SiO2的第一个功能是改善聚氨酯涂料的流变性能，用于制造可打印的前驱体，从而提高打印分辨率，增强增材制造能力。其次，复合前驱体在不改变聚氨酯涂料原有形状记忆性能的前提下，提高了聚氨酯涂料的固化速度。第三，与纯聚氨酯打印的零件相比，打印的复合材料零件的机械强度有所提高。最后，3D打印的聚氨酯- cmc和SiO2部件在热刺激下表现出时间分辨的形状变化。据我们所知，这是第一次研究使用聚氨酯涂料作为4D打印的前体，这将为未来在生物医学工程、软机器人等领域的应用开辟新的可能性。
In recent studies, polyurethane has shown multiple properties that make it an excellent candidate material in 4D printing. In this study, we present a simple and inexpensive additive method to print waterborne polyurethane paint-based composites by adding carboxymethyl cellulose (CMC) and silicon oxide (SiO2) nanoparticles to the paint. The first function of CMC and SiO2 is to improve rheological properties of the polyurethane paint for making a printable precursor, which improves the printing resolution and enhances additive manufacturability. Second, the composite precursors improve the curing rate of the polyurethane paint without changing its inherited shape memory properties. Third, the printed composite parts shown enhanced mechanical strength compared with that of the parts printed with pure polyurethane. Finally, the 3D printed polyurethane-CMC and SiO2 parts exhibit time-resolved shape transformation upon heat stimulation. To the best of our knowledge, this is the first study of using the polyurethane paint as the precursor for 4D printing, which would open new possibilities in future applications in biomedical engineering, soft robotics and so on.[GRAPHICS].