High-resolution 3D printing of electrically conductive inks based on pedot:pss for electromagnetic interference shielding
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Ghaderi, Saeed
issued: 2023-02-27T19:13:48Z
issued: 2023
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: 3D printing of conducting polymers has been achieved very recently by direct ink writing of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS)-based inks. This field is in its infancy, calling for further research to broaden the application horizon of 3D-printed conductive polymers by fine-tuning their inherent properties. Indeed, engineering PEDOT:PSS inks with customizable electrical properties while keeping their rheological fingerprint within the proper range for high-fidelity 3D printing is an arduous challenge, yet to be achieved. Herein, a range of PEDOT:PSS-based inks were formulated by molecular engineering via co-solvent doping and solvent post-treatment with various solvents for high-resolution (line width and thickness variations less than 20 % from average values) and high-aspect-ratio ( ≥ 25 layers) 3D printing. Dimethyl sulfoxide (DMSO), ethylene glycol (EG), and N,N-dimethylformamide (DMF) were used for co-solvent doping, and DMSO, EG, DMF, methanol, and ethanol were used for solvent post-treatment. The effects of co-solvent doping of high-boiling-point co-solvents on rheological properties and, thus, printability of the inks were explored. Inks’ 3D printability range was defined based on shear viscosity, storage modulus, and yield stress values as a function of PEDOT:PSS concentration. Experimental analyses demonstrated that the strong interactions between solvent molecules and free PSS chains account for the partial removal of non-conductive PSS-rich shells from conductive PEDOT-rich cores. Via coupling solvent treatment and a simple dry-annealing technique, samples featured a wide range of conductivity, i.e., from 0.6 to 858.1 ± 60.8 S cm-1. Taking advantage of solvent treatment, the 3D-printed geometries were wet-transferred onto uneven substrates and complex objects with sharp edges. By exploiting their tunable molecular-scale chemistry and macro-scale geometric features, the 3D-printed parts were used to create electromagnetic i…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/83860
note: HIGH-RESOLUTION 3D PRINTING OF ELECTRICALLY CONDUCTIVE INKS BASED ON PEDOT:PSS FOR ELECTROMAGNETIC INTERFERENCE SHIELDING by Saeed Ghaderi M.Sc., Chemical Engineering, Sharif University of Technology, Iran, 2019 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in The College of Graduate Studies (Mechanical Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) February 2023 © Saeed Ghaderi, 2023 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis entitled: HIGH-RESOLUTION 3D PRINTING OF ELECTRICALLY CONDUCTIVE INKS BASED ON PEDOT:PSS FOR ELECTROMAGNETIC INTERFERENCE SHIELDING submitted by Saeed Ghaderi in partial fulfillment of the requirements for the degree of Master of Applied Science Dr. Mohammad Arjmand, School of Engineering Supervisor Dr. Jian Liu, School of Engineering Supervisory Committee Member Dr. Sina Kheirkhah, School of Engineering Supervisory Committee Member Dr. Mahmudur Fatmi, School of Engineering University Examiner iii Abstract 3D printing of conducting polymers has been achieved very recently by direct ink writing of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS)-based inks. This field is in its infancy, calling for further research to broaden the application horizon of 3D-printed conductive polymers by fine-tuning their inherent properties. Indeed, engineering PEDOT:PSS inks with customizable electrical properties while keeping their rheological fingerprint within the proper range for high-fidelity 3D printing is an arduous challenge, yet to be achieved. Herein, a range of PEDOT:PSS-based inks were formulated by molecular engineering via co-solvent doping and solvent post-treatment with various solvents for high-resolution (line width and thickness variations less than 20 % from average values) and high-aspect-ratio ( ≥ 25 layers) 3D printing. Dimethyl sulfoxide (DMSO), ethylene glycol…
has type: Thesis/Dissertation
date issued: 2023-02
is shown at: 10.14288/1.0427282
language: eng
degree discipline: Mechanical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Arjmand, Mohammad
type: Text
identifier URI: http://hdl.handle.net/2429/83860