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3D printing of epoxy-based composites with high strength and electromagnetic interference shielding ability.

Authors :
QU Daopeng
ZHANG Tao
HUA Chenxi
SONG Xinyu
CHENG Changli
LIU Yu
WANG Zhenyu
Source :
China Plastics / Zhongguo Suliao; 9/26/2024, Vol. 38 Issue 9, p24-29, 6p
Publication Year :
2024

Abstract

A dual-material 3D printing technique is developed to rationally construct namrsilica/carbon black/epoxy (SiO<subscript>2</subscript>/CB/EP) composites through alternately arranging nano-silica/epoxy (SiO<subscript>2</subscript>/EP) composites with high strength and carbon black/epoxy (CB/EP) composites with high conductivity. According to the rheological properties, the epoxy composites with 11. 6 wt. % SiO<subscript>2</subscript> and 10 wt. % CB exhibits excellent printability. A stable diameter of 400 μm was achieved through controlling the extrusion pressure and printing speed. The SiO<subscript>2</subscript>/CB/EP composites show an excellent manufacturing accuracy and a highly ordered 3D structure as verified by the optical and micro-CT images. The tensile, compres-sive and bending strengths of the SiO<subscript>2</subscript>/CB/EP composites were 35 MPa, 64 MPa and 120 MPa, respectively, indicating that there is no attenuation compared to those of the SiO<subscript>2</subscript>/EP composites. Moreover, the electromagnetic interference shielding effectiveness of the composites is as high as 25 dB on the basis of the microwave absorbing mechanism. [ABSTRACT FROM AUTHOR]

Details

Language :
Chinese
ISSN :
10019278
Volume :
38
Issue :
9
Database :
Complementary Index
Journal :
China Plastics / Zhongguo Suliao
Publication Type :
Academic Journal
Accession number :
179942541
Full Text :
https://doi.org/10.19491/j.issn.1001-9278.2024.09.005