Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides
Abstract Ga and Ga‐based alloys have recently received significant attention as “liquid metals (LMs)” with the combined advantages of a low toxicity, low melting point, high fluidity, and high conductivity. An important method for modifying LMs for enhanced processabilities and new applications is t...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-04-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202202527 |
| _version_ | 1797772495521054720 |
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| author | Seoung Young Ryu Hyunji Lee Younggi Hong Harshad Bandal Munju Goh Hern Kim Joohyung Lee |
| author_facet | Seoung Young Ryu Hyunji Lee Younggi Hong Harshad Bandal Munju Goh Hern Kim Joohyung Lee |
| author_sort | Seoung Young Ryu |
| collection | DOAJ |
| description | Abstract Ga and Ga‐based alloys have recently received significant attention as “liquid metals (LMs)” with the combined advantages of a low toxicity, low melting point, high fluidity, and high conductivity. An important method for modifying LMs for enhanced processabilities and new applications is to tailor them into colloidal microdroplets suspended in a liquid medium. In this study, the unique vitrification behavior of oil‐based colloidal systems is shown with suspended LM microdroplets induced by various mineral oxide (MO) nanoparticles that are added as solid rheology modifiers. MOs exhibit a high affinity for the surfaces of suspended LM droplets in an apolar oil medium due to the polar interaction between the MO surface and the oxide skin of the LM. Thus, even minute amounts of added MOs (ΦMO < 0.01) transform a free‐flowing LM suspension (ΦMO ≈ 0.55) into a highly viscoelastic fluid that enables advanced processing (e.g., 3D printing). At high MO loadings (ΦMO ≥ 0.1), an emulsion with unprecedentedly high rheological strength is obtained, characterized by a yield stress of ≈104 Pa. In highly vitrified emulsions, partial sintering effects are induced by high internal sample stress, which improves the thermophysical properties of emulsions that may be useful for several practical applications. |
| first_indexed | 2024-03-12T21:52:44Z |
| format | Article |
| id | doaj.art-f7654c7eb501421ea97fe1c669752283 |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-12T21:52:44Z |
| publishDate | 2023-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-f7654c7eb501421ea97fe1c6697522832023-07-26T01:35:54ZengWiley-VCHAdvanced Materials Interfaces2196-73502023-04-011012n/an/a10.1002/admi.202202527Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral OxidesSeoung Young Ryu0Hyunji Lee1Younggi Hong2Harshad Bandal3Munju Goh4Hern Kim5Joohyung Lee6Department of Chemical Engineering Myongji University 116 Myongji‐ro, Cheoin‐gu Yongin Gyeonggi‐do 17058 KoreaDepartment of Chemical Engineering Myongji University 116 Myongji‐ro, Cheoin‐gu Yongin Gyeonggi‐do 17058 KoreaDepartment of Chemical Engineering Konkuk University 120 Neungdong‐ro, Gwangjin‐gu Seoul 05029 KoreaDepartment of Energy Science and Technology Environmental Waste Recycle Institute Myongji University 116 Myongji‐ro, Cheoin‐gu Yongin Gyeonggi‐do 17058 KoreaDepartment of Chemical Engineering Konkuk University 120 Neungdong‐ro, Gwangjin‐gu Seoul 05029 KoreaDepartment of Energy Science and Technology Environmental Waste Recycle Institute Myongji University 116 Myongji‐ro, Cheoin‐gu Yongin Gyeonggi‐do 17058 KoreaDepartment of Chemical Engineering Myongji University 116 Myongji‐ro, Cheoin‐gu Yongin Gyeonggi‐do 17058 KoreaAbstract Ga and Ga‐based alloys have recently received significant attention as “liquid metals (LMs)” with the combined advantages of a low toxicity, low melting point, high fluidity, and high conductivity. An important method for modifying LMs for enhanced processabilities and new applications is to tailor them into colloidal microdroplets suspended in a liquid medium. In this study, the unique vitrification behavior of oil‐based colloidal systems is shown with suspended LM microdroplets induced by various mineral oxide (MO) nanoparticles that are added as solid rheology modifiers. MOs exhibit a high affinity for the surfaces of suspended LM droplets in an apolar oil medium due to the polar interaction between the MO surface and the oxide skin of the LM. Thus, even minute amounts of added MOs (ΦMO < 0.01) transform a free‐flowing LM suspension (ΦMO ≈ 0.55) into a highly viscoelastic fluid that enables advanced processing (e.g., 3D printing). At high MO loadings (ΦMO ≥ 0.1), an emulsion with unprecedentedly high rheological strength is obtained, characterized by a yield stress of ≈104 Pa. In highly vitrified emulsions, partial sintering effects are induced by high internal sample stress, which improves the thermophysical properties of emulsions that may be useful for several practical applications.https://doi.org/10.1002/admi.202202527adhesioncolloidEGaInemulsionliquid metaloxide |
| spellingShingle | Seoung Young Ryu Hyunji Lee Younggi Hong Harshad Bandal Munju Goh Hern Kim Joohyung Lee Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides Advanced Materials Interfaces adhesion colloid EGaIn emulsion liquid metal oxide |
| title | Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides |
| title_full | Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides |
| title_fullStr | Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides |
| title_full_unstemmed | Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides |
| title_short | Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides |
| title_sort | vitrification of liquid metal in oil emulsions using nano mineral oxides |
| topic | adhesion colloid EGaIn emulsion liquid metal oxide |
| url | https://doi.org/10.1002/admi.202202527 |
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