High‐Speed 3D Printing of High‐Performance Thermosetting Polymers via Two‐Stage Curing
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 31, 2018
- Source ID
- 10.1002/marc.201700809
Entities
People
- Fang Daining
- Guozheng Kang
- H. Jerry Qi
- Kaijuan Chen
- Xiao Kuang
- Zeang Zhao
Organizations
- Air Force Office of Scientific Research
- Georgia Tech
- National Natural Science Foundation of China
- National Science Foundation Directorate for Engineering
- Peking University
- Southwest Jiaotong University