Printability and heat induction via magnetism of 4D printed iron oxide shape memory polymer composite

• Main Author: Chiew, Guang Hui
• Other Authors: Su Pei-Chen
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2022
• Subjects: Engineering::Materials::Magnetic materials
• Online Access: https://hdl.handle.net/10356/157878
• Institution: Nanyang Technological University

The aim of this Final Year Project (FYP) is to evaluate the feasibility of printing Iron (II, III) Oxide (Fe3O4)-filler Shape Memory Polymer (SMP) using a 3D printing technology called Digital Light Processing (DLP) that utilizes a Vat Polymerization process. Furthermore, the effects of increasing Fe3O4 particle loading on the material properties and the viability of heat generation of Fe3O4-filler SMP will be examined in this project. Various experiment methods have been used to obtain quantitative results for analysis purposes. The sedimentation test was used to evaluate the effect of ultrasonication on the dispersion of Fe3O4 particles in liquid resin. The cure depth test and printability test were used to examine the printing properties. The tensile test was used to determine the mechanical properties. The heat generation test was used to investigate the viability of heating Fe3O4-filler SMP using Low-Frequency Induction Heating (LFIH). Experimental results showed that an ultrasonication bath helped to evenly disperse Fe3O4 particles in the liquid resin and a homogenous mixture was obtained. However, the excessive duration of the ultrasonication bath caused rapid sedimentation of Fe3O4 particles. The incorporation of Fe3O4 particles in SMP showed a deterioration in mechanical properties to a certain extent. With the increasing Fe3O4 particles weightage in the SMP, it caused an adverse effect on the mechanical properties. Furthermore, the printability of the Fe3O4-filler SMP was greatly affected and printing defects such as warpage and delamination were observed on the printed parts. Results showed that it is possible to generate heat in Fe3O4-filler SMP using LIFH. From the results obtained from the experiment methods, it is feasible to print Fe3O4- filler SMP using DLP up to a certain extent. However, with the increasing Fe3O4 particles weightage in the SMP, it caused adverse effects on the printing properties and the material properties. Heat generation was observed when the Fe3O4-filler SMP was exposed to an alternating magnetic field. However, the increase in temperature for Fe3O4-filler SMP is minor. Therefore, this project will investigate the effects of increasing Fe3O4 particles weightage in the SMP and the viability of heat generation of Fe3O4-filler SMP.