Effects of Carbonyl Iron Powder (CIP) Content on the Electromagnetic Wave Absorption and Mechanical Properties of CIP/ABS Composites.

Wenwen Lai,Junkun He,Yan Wang

doi:10.3390/polym12081694

Abstract

Three-dimensional (3D) printing technology has proven to be a convenient and effective method to fabricate structural electromagnetic wave (EMW) absorbers with tunable EMW absorption properties. To obtain a functional material with strong EMW absorbing performance and excellent mechanical properties for fused deposition modeling (FDM) 3D printing technology, in this work, carbonyl iron powder (CIP)/acrylonitrile-butadiene-styrene copolymer (ABS) composites with different CIP contents were prepared by the melt-mixing process. The effects of the CIP content on the EMW absorption and mechanical properties of CIP/ABS composites were investigated. The CIP/ABS composite with a CIP content of 40 wt.% presented the lowest reflection loss (RL) of −48.71 dB for the optimal impedance matching. In addition, this composite exhibited optimal mechanical properties due to the good dispersion of the CIPs in the matrix ABS. Not only were the tensile and flexural strength similar to pure ABS, but the tensile and flexural modulus were 32% and 37% higher than those of pure ABS, respectively. With a CIP content of 40 wt.%, the CIP/ABS composite proved to be a novel functional material with excellent EMW absorbing and mechanical properties, providing great potential for the development of structural absorbers via FDM 3D printing technology.

Highlights

Nowadays, electromagnetic wave (EMW) radiation has attracted much attention due to its great damage to the health of human beings and information safety [1,2,3,4,5,6]
The carbonyl iron powder (CIP)/acrylonitrile-butadiene-styrene copolymer (ABS) composite with a CIP content of 40 wt.% presented a tensile modulus of 1701 MPa and a flexural modulus of 2745 MPa, which were 32% and 37% higher than those of pure ABS, respectively
All of these results indicate the CIP/ABS composite with a CIP content of 40 wt.%

Summary

Introduction

Electromagnetic wave (EMW) radiation has attracted much attention due to its great damage to the health of human beings and information safety [1,2,3,4,5,6] To solve these problems, there is an urgent demand for the development of electromagnetic wave absorbing materials (EMWMs) with high EMW absorbing performance [7,8,9,10,11]. Polymeric EWAMs, which were fabricated by adding one or more types of absorbing agents to the polymer matrix, have been widely investigated due to their outstanding mechanical properties and processability [17,18,19,20,21,22] Among these absorbents, carbonyl iron powders (CIPs) have been widely used owing to their low price, high specific saturated magnetization, and strong absorption capacity [23,24,25,26,27]. The modification of magnetic fillers, employment of multiple absorbents, and structural

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Conclusion