Properties of Polydimethylsiloxane and Magnetoactive Polymers with Electroconductive Particles

Abstract

1. The compounds are electrically conductive and stable; 2. Suitable for 3D and 6D printing. Conducting PolymersMagnetoactive polymers are intelligent materials whose mechanical and electrical characteristics are reversibly influenced by external magnetic stimuli. They consist of a highly elastic polymer matrix in which magnetically soft and/or hard particles are distributed by means of special fabrication processes. In addition to ferromagnetic particles such as carbonyl iron powder, electrically conductive particles may also be embedded into the polymer matrix. After characterizing a range of compounds, this work focuses on a comparison of the electrical properties and the suitability of various materials for applications, with particular emphasis on integration into 3D and 6D printing processes. 6D printing is based on the selective positioning of particles in a 3D polymer matrix with a further three degrees of freedom for a graduated dispersion of the particles at certain points and in desired directions. The aim is therefore to ensure that the polymers containing electroconductive tracks have the best possible electrical properties, that is, low resistivity but are still capable of being printed. A comparison between the traditionally used compounds containing graphite and carbon black is made for the first time. This latter is found to be greatly superior both in terms of electrical conductivity and applicability to 3D printing and 6D printing.

Effects of Printing Temperature and Filling Percentage on the Mechanical Behavior of Fused Deposition Molding Technology Components for 3D Printing

“…(1) Increasing ease in the infill percentage and the nozzle temperature enhance the Young's modulus and Shore hardness of materials about 23% and 2.3%, respectively. (2) The strength and the elongation of the material increase about 16% and 61%, respectively, with the nozzle temperature and the infill percentage but decrease after the UV curing process. (3) After the UV curing process, there is a significant reduction in the rate of change of strength, and elongation about 2.2% and 6.79%, respectively, but the rate of change of Young's modulus increases about 25.26%.…”

“…Technology is advancing with each passing day. Desktop technologies, including 3D, 4D, 5D and 6D printing technology, also known as additive manufacturing (AM) [ 1 , 2 , 3 ], has been evolving to meet the requirements of low prices, low consumables, and low operating costs of industry. AM has the advantages of providing lightweight microporous structures with customized features and being environmentally safe.…”

Magnetorheology: a review

“…A strain sensor based on conductive MREs containing silver nanowires in a polyurethane sponge, CIP and PDMS matrix was developed by Hu et al 299 Prem et al 300 synthesized electromagneto responsive elastomers by mixing magnetic CIP and electrically conductive particles. Landa et al 301 prepared Ni-based MRE with particles having spherical and rod-like shapes.…”

Synthesis and characterization of the properties of thermosensitive elastomers with thermoplastic and magnetic particles for application in soft robotics

“…These particles were preferred to other hard or soft magnetic particles on account of their uncomplicated handling. In addition, there is a wide range of experience in the production as well as numerous investigations on the influence of the particles in combination with the so‐called MSE 3,6 . In this case, the remaining question is whether a combination of the two particle groups (soft magnetic and thermoplastic particles) in an elastic matrix is appropriate.…”

“…Beyond that these properties can be set during MSE's production by prior application of magnetic fields, mechanical stresses and preliminary treatment of the filler particles 3–5 . Smart materials can also consist of an elastic matrix and electrically conductive fillers, which causes the actual insulator to become electrically conductive, resulting in the so‐called electroactive polymers (EAPs) 6 . Due to these controllable physical material properties, there is a great interest especially in the fields of (soft) robotics, medical engineering, and so forth 7 .…”