4D printed electro-induced continuous carbon fiber reinforced shape memory polymer composites with excellent bending resistance

Published on Aug 1, 2020in Composites Part B-engineering7.635
· DOI :10.1016/J.COMPOSITESB.2020.108034
Chengjun Zeng3
Estimated H-index: 3
(HIT: Harbin Institute of Technology),
Liwu Liu34
Estimated H-index: 34
(HIT: Harbin Institute of Technology)
+ 2 AuthorsJinsong Leng64
Estimated H-index: 64
(HIT: Harbin Institute of Technology)
Sources
Abstract
Abstract Four-dimensional (4D) printing technology of continuous carbon fiber reinforced shape memory polymer composites is a potential manufacturing process for lightweight and high-strength intelligent composite structures. In this study, a 3D printer with dual feed channels based on the fused deposition modeling (FDM) was designed to fabricate continuous carbon fiber reinforced shape memory poly(lactic acid)-based composites (CFRSMPC). The impact of various printing parameters on the bending strength and flexural modulus of 4D printed CFRSMPC was evaluated by the three-point bending test. Meanwhile, mathematical prediction models of bending strength and modulus based on the existing experimental data were established. The electro-induced shape memory effect of 4D printed CFRSMPC was investigated by the electric heating shape recovery test. The shape recovery rate of the specimens was more than 95%, indicating that the resistance heating method is stable and feasible. The quantitative effect of bending angle and temperature on the resistance of CFRSMPC during the programming and recovery process was further investigated. The results demonstrated that the real-time deformation of the CFRSMPC could be monitored by the resistance measurement method. It can be concluded that the CFRSMPC fabricated using the 4D printing method can serve as potential building blocks for electrically activated and deployable structures.
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