Fabrication of low dielectric constant composite filaments for use in fused filament fabrication 3D printing

被引：19

作者：

Parsons, Paul ^{[1
]}

Larimore, Zachary ^{[1
]}

Muhammed, Faheem ^{[1
]}

Mirotznik, Mark ^{[1
]}

机构：

[1] Univ Delaware, Dept Elect & Comp Engn, Newark, DE 19716 USA

来源：

ADDITIVE MANUFACTURING | 2019年 / 30卷

关键词：

Additive Manufacturing; Fused Filament Fabrication; Electromagnetic Materials; Composite Materials; Dielectric Materials; Low-Dielectric Loss Materials; RF and Microwave Characterization; Manufacturing Processes; PERMITTIVITY; ANTENNAS;

D O I：

10.1016/j.addma.2019.100888

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper we describe a method for creating flexible composite filaments with dielectric constants below 2.0 over a wide frequency band (i.e. 18-40 GHz). We demonstrate that a low dielectric constant composite filament, useful for FFF printing, can be manufactured by combining a base thermoplastic polymer with hollow microspheres and a plasticizer. Experimental results are provided for filaments made from two different base polymers (i.e. ABS and HDPE) and varying volume fractions of hollow microspheres. We also describe an effective media model to predict the dielectric properties of the composite filaments as a function of the properties of the constituent materials (e.g. base polymer, hollow microspheres) and their relative volume fractions within the composite filament. Experimental test samples were printed using the new low-K filaments and experimental characterization results are provided that validate this approach.

引用

页数：10

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