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Single additive enables 3D printing of highly loaded iron oxide suspensions

Hodaei, Amin and Akhlaghi Baghoojari, Omid and Khani, Navid and Aytaş, Tunahan and Sezer, Dilek and Tatlı, Buse and Menceloğlu, Yusuf Z. and Koç, Bahattin and Akbulut, Özge (2018) Single additive enables 3D printing of highly loaded iron oxide suspensions. ACS Applied Materials & Interfaces, 10 (11). pp. 9873-9881. ISSN 1944-8244 (Print) 1944-8252 (Online)

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Official URL: http://dx.doi.org/10.1021/acsami.8b00551

Abstract

A single additive, a grafted copolymer, is designed to ensure the stability of suspensions of highly loaded iron oxide nanoparticles (IOPs) and to facilitate three-dimensional (3D) printing of these suspensions in the filament form. This poly (ethylene glycol)-grafted copolymer of N-[3(dimethylamino)propyl]methacrylamide and acrylic acid harnesses both electrostatic and steric repulsion to realize an optimum formulation for 3D printing. When used at 1.15 wt % (by the weight of IOPs), the suspension attains ∼81 wt % solid loading96% of the theoretical limit as calculated by the Krieger−Dougherty equation. Rectangular, thick-walled toroidal, and thin-walled toroidal magnetic cores and a porous lattice structure are fabricated to demonstrate the utilization of this suspension as an ink for 3D printing. The electrical and magnetic properties of the magnetic cores are characterized through impedance spectroscopy (IS) and vibrating sample magnetometry (VSM), respectively. The IS indicates the possibility of utilizing wire-wound 3D printed cores as the inductive coils. The VSM verifies that the magnetic properties of IOPs before and after the ink formulation are kept almost unchanged because of the low dosage of the additive. This particle-targeted approach for the formulation of 3D printing inks allows embodiment of a fully aqueous system with utmost target material content.

Item Type:Article
Uncontrolled Keywords:3D printing; iron oxide; colloids; magnetic nanoparticles; inductors; suspensions
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
ID Code:35254
Deposited By:Özge Akbulut
Deposited On:15 Aug 2018 12:01
Last Modified:15 Aug 2018 12:01

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