Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development
Magnetic composites play a significant role in various electrical and electronic devices. Properties of such magnetic composites depend on the particle microstructural distribution within the polymer matrix. In this study, a methodology to manufacture magnetic composites with isotropic and anisotrop...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/12/9/2143 |
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| author | Balakrishnan Nagarajan Martin A.W. Schoen Simon Trudel Ahmed Jawad Qureshi Pierre Mertiny |
| author_facet | Balakrishnan Nagarajan Martin A.W. Schoen Simon Trudel Ahmed Jawad Qureshi Pierre Mertiny |
| author_sort | Balakrishnan Nagarajan |
| collection | DOAJ |
| description | Magnetic composites play a significant role in various electrical and electronic devices. Properties of such magnetic composites depend on the particle microstructural distribution within the polymer matrix. In this study, a methodology to manufacture magnetic composites with isotropic and anisotropic particle distribution was introduced using engineered material formulations and manufacturing methods. An in-house developed material jetting 3D printer with particle alignment capability was utilized to dispense a UV curable resin formulation to the desired computer aided design (CAD) geometry. Formulations engineered using additives enabled controlling the rheological properties and the microstructure at different manufacturing process stages. Incorporating rheological additives rendered the formulation with thixotropic properties suitable for material jetting processes. Particle alignment was accomplished using a magnetic field generated using a pair of permanent magnets. Microstructure control in printed composites was observed to depend on both the developed material formulations and the manufacturing process. The rheological behavior of filler-modified polymers was characterized using rheometry, and the formulation properties were derived using mathematical models. Experimental observations were correlated with the observed mechanical behavior changes in the polymers. It was additionally observed that higher additive content controlled particle aggregation but reduced the degree of particle alignment in polymers. Directionality analysis of optical micrographs was utilized as a tool to quantify the degree of filler orientation in printed composites. Characterization of in-plane and out-of-plane magnetic properties using a superconducting quantum interference device (SQUID) magnetometer exhibited enhanced magnetic characteristics along the direction of field structuring. Results expressed in this fundamental research serve as building blocks to construct magnetic composites through material jetting-based additive manufacturing processes. |
| first_indexed | 2024-03-10T16:12:09Z |
| format | Article |
| id | doaj.art-f2655a6b761b4807a4a40796252da426 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T16:12:09Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-f2655a6b761b4807a4a40796252da4262023-11-20T14:24:12ZengMDPI AGPolymers2073-43602020-09-01129214310.3390/polym12092143Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process DevelopmentBalakrishnan Nagarajan0Martin A.W. Schoen1Simon Trudel2Ahmed Jawad Qureshi3Pierre Mertiny4Department of Mechanical Engineering, University of Alberta, 9211-116 St., NW Edmonton, AB T6G 1H9, CanadaDepartment of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, CanadaDepartment of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, CanadaDepartment of Mechanical Engineering, University of Alberta, 9211-116 St., NW Edmonton, AB T6G 1H9, CanadaDepartment of Mechanical Engineering, University of Alberta, 9211-116 St., NW Edmonton, AB T6G 1H9, CanadaMagnetic composites play a significant role in various electrical and electronic devices. Properties of such magnetic composites depend on the particle microstructural distribution within the polymer matrix. In this study, a methodology to manufacture magnetic composites with isotropic and anisotropic particle distribution was introduced using engineered material formulations and manufacturing methods. An in-house developed material jetting 3D printer with particle alignment capability was utilized to dispense a UV curable resin formulation to the desired computer aided design (CAD) geometry. Formulations engineered using additives enabled controlling the rheological properties and the microstructure at different manufacturing process stages. Incorporating rheological additives rendered the formulation with thixotropic properties suitable for material jetting processes. Particle alignment was accomplished using a magnetic field generated using a pair of permanent magnets. Microstructure control in printed composites was observed to depend on both the developed material formulations and the manufacturing process. The rheological behavior of filler-modified polymers was characterized using rheometry, and the formulation properties were derived using mathematical models. Experimental observations were correlated with the observed mechanical behavior changes in the polymers. It was additionally observed that higher additive content controlled particle aggregation but reduced the degree of particle alignment in polymers. Directionality analysis of optical micrographs was utilized as a tool to quantify the degree of filler orientation in printed composites. Characterization of in-plane and out-of-plane magnetic properties using a superconducting quantum interference device (SQUID) magnetometer exhibited enhanced magnetic characteristics along the direction of field structuring. Results expressed in this fundamental research serve as building blocks to construct magnetic composites through material jetting-based additive manufacturing processes.https://www.mdpi.com/2073-4360/12/9/2143additive manufacturingmagnetic compositesferrite compositesfield structuringmicrostructure controlrheological modifications |
| spellingShingle | Balakrishnan Nagarajan Martin A.W. Schoen Simon Trudel Ahmed Jawad Qureshi Pierre Mertiny Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development Polymers additive manufacturing magnetic composites ferrite composites field structuring microstructure control rheological modifications |
| title | Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development |
| title_full | Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development |
| title_fullStr | Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development |
| title_full_unstemmed | Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development |
| title_short | Rheology-Assisted Microstructure Control for Printing Magnetic Composites—Material and Process Development |
| title_sort | rheology assisted microstructure control for printing magnetic composites material and process development |
| topic | additive manufacturing magnetic composites ferrite composites field structuring microstructure control rheological modifications |
| url | https://www.mdpi.com/2073-4360/12/9/2143 |
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