About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Recent Advances in Printed Electronics and Additive Manufacturing: 2D/3D Functional Materials, Fabrication Processes, and Emerging Applications
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Presentation Title |
Unconventional Low-viscosity Direct Ink Writing: Surface Force-driven Deposition of Polyelectrolyte-based Membranes |
Author(s) |
Guy Jacob Cordonier, KmProttoy Shariar Piash, Oishi Sanyal, Konstantinos Sierros |
On-Site Speaker (Planned) |
Guy Jacob Cordonier |
Abstract Scope |
This work explores an unconventional 3D printing method of direct ink writing low-viscosity inks to develop polyelectrolyte-based water-treatment membranes. In this work, the two polyelectrolytes, Poly(acrylic acid) and Poly(allylamine hydrochloride), are dissolved in water to form inks and deposited layer-by-layer in meandering patterns, producing cross-linked, porous polymer films up to hundreds of nanometers-microns in thickness. These porous films are developed via exposure of the layer-by-layer coated film to a highly acidic/alkaline solution which induces the formation of macro and nano porosities. The same inks are used to fabricate films using a traditional layer-by-layer dip coating approach for comparison purposes. The molecular weight of each polymer and the post-treatment steps for deposited films are varied to alter the films’ morphological and transport properties. Besides evaluation of the resulting membrane separation properties, scanning electron microscopy, atomic force microscopy, optical profilometry and contact angle are used to characterize the printed films. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Thin Films and Interfaces, |