High‐Speed 3D Printing of High‐Performance Thermosetting Polymers via Two‐Stage Curing,Macromolecular Rapid Communications

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High‐Speed 3D Printing of High‐Performance Thermosetting Polymers via Two‐Stage Curing
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-01-31 , DOI: 10.1002/marc.201700809
Xiao Kuang _{1,

2} , Zeang Zhao _{1,

3} , Kaijuan Chen _{1,

4} , Daining Fang ₃ , Guozheng Kang ₄ , Hang Jerry Qi _{1,

2}

Affiliation

Design and direct fabrication of high‐performance thermosets and composites via 3D printing are highly desirable in engineering applications. Most 3D printed thermosetting polymers to date suffer from poor mechanical properties and low printing speed. Here, a novel ink for high‐speed 3D printing of high‐performance epoxy thermosets via a two‐stage curing approach is presented. The ink containing photocurable resin and thermally curable epoxy resin is used for the digital light processing (DLP) 3D printing. After printing, the part is thermally cured at elevated temperature to yield an interpenetrating polymer network epoxy composite, whose mechanical properties are comparable to engineering epoxy. The printing speed is accelerated by the continuous liquid interface production assisted DLP 3D printing method, achieving a printing speed as high as 216 mm h⁻¹. It is also demonstrated that 3D printing structural electronics can be achieved by combining the 3D printed epoxy composites with infilled silver ink in the hollow channels. The new 3D printing method via two‐stage curing combines the attributes of outstanding printing speed, high resolution, low volume shrinkage, and excellent mechanical properties, and provides a new avenue to fabricate 3D thermosetting composites with excellent mechanical properties and high efficiency toward high‐performance and functional applications.

中文翻译：

通过两阶段固化对高性能热固性聚合物进行高速3D打印

在工程应用中，非常需要通过3D打印设计和直接制造高性能热固性塑料和复合材料。迄今为止，大多数3D打印的热固性聚合物均具有较差的机械性能和较低的打印速度。在此，将介绍一种通过两步固化方法用于高性能环氧热固性塑料的高速3D打印的新型油墨。包含光固化树脂和热固化环氧树脂的墨水用于数字光处理（DLP）3D打印。印刷后，将零件在高温下热固化，以生成互穿聚合物网络环氧复合材料，其机械性能可与工程环氧媲美。通过连续的液体界面生产辅助DLP 3D打印方法可以加快打印速度，^-1。还证明了可以通过将3D打印的环氧树脂复合材料与空心通道中的填充银墨水结合使用来实现3D打印结构电子学。通过两阶段固化的新3D打印方法结合了出色的打印速度，高分辨率，低体积收缩率和出色的机械性能的特性，为制造3D热固性复合材料提供了一条新途径，该复合材料具有出色的机械性能和高效率，可实现高效率。性能和功能应用程序。

更新日期：2018-01-31

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