Stereolithography (SLA) 3D printing of carbon fiber-graphene oxide (CF-GO) reinforced polymer lattices

Ran Xiao; Mingyang Ding; Yuejiao Wang; Libo Gao; Rong Fan; Yang Lu

doi:10.1088/1361-6528/abe825

Stereolithography (SLA) 3D printing of carbon fiber-graphene oxide (CF-GO) reinforced polymer lattices

Nanotechnology. 2021 Mar 16;32(23). doi: 10.1088/1361-6528/abe825.

Authors

Ran Xiao^{1

2}, Mingyang Ding¹, Yuejiao Wang^{1

2}, Libo Gao^{3

4}, Rong Fan^{1

5}, Yang Lu^{1

2

4}

Affiliations

¹ Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, People's Republic of China.
² Nano-Manufacturing Laboratory (NML), Shenzhen Research Institute of City University of Hong Kong, Shenzhen 518057, People's Republic of China.
³ School of Mechano-Electronic Engineering, Xidian University, Xian 710071, People's Republic of China.
⁴ CityU-Xidian Joint Laboratory of Micro/Nano-Manufacturing, Shenzhen 518057, People's Republic of China.
⁵ School of Automotive Engineering, Dalian University of Technology, Liaoning 116024, People's Republic of China.

PMID: 33607638
DOI: 10.1088/1361-6528/abe825

Abstract

Insufficient mechanical properties of stereolithography (SLA)-printed architected polymer metamaterial limits its wide applications such as in the areas of biomedicine and aerospace. One effective solution is to reinforce the structures with micro- or nano- fibers/particles, but their interfaces are critical for the reinforcement. In this work, a carbon fiber-graphene oxide (CF-GO) polymer composite resin and a mild annealing postprocess have been rationally designed and applied into the manufacturing of oct-truss (OCT) lattices.In situcarbon fiber pulling-out experiment was conducted to exhibit the improve effect of GO on the crosslink of the CF and the polymer matrix interface. We found that the maximum reinforcement was realized when the CF-GO (CF: GO is about 3: 1) content is about 0.8 wt%, followed with annealing. Compared with pure polymer lattices, the compression strength of the CF-GO polymer OCT lattices has been significantly increased from ∼0.22 to ∼2.4 MPa, almost 10 times enhancement. Importantly, the compression strength of the CF-GO polymer OCT lattice (3.08 MPa) further increased by ∼30% after optimized annealing. This work suggests an efficient reinforce strategy for SLA-printed metamaterials, and thus can be valuable for advancing various practical applications of mechanical metamaterials.

Keywords: architected metamaterials; carbon fiber reinforced polymer (CFRP); graphene oxide (GO); nano-manufacturing; stereolithography (SLA) 3D printing.