Synthesis and characteristics of silica nano-particles using modified sol–gel method in microreactor
Sol-gel is one of the known and widely applied techniques in nano-particles synthesis. However, the conventional batch sol–gel method produces silica nano-particles with uneven shapes and wide size distribution. In the present work, silica nano-particles will be synthesized using a traditional sol–g...
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my.ump.umpir.315472021-06-21T05:46:37Z http://umpir.ump.edu.my/id/eprint/31547/ Synthesis and characteristics of silica nano-particles using modified sol–gel method in microreactor Fiona, W.M. Ling Abdulbari, Hayder A. Chin, Sim-Yee TP Chemical technology Sol-gel is one of the known and widely applied techniques in nano-particles synthesis. However, the conventional batch sol–gel method produces silica nano-particles with uneven shapes and wide size distribution. In the present work, silica nano-particles will be synthesized using a traditional sol–gel method and a modified sol–gel technique by creating a microfluidic reactor. A olydimethylsiloxane microreactor was first designed and fabricated using the direct writing method. The microfluidic reactor was designed with a micro-droplets generation junction where the reactants are mixed to generate droplets where each droplet as an independent reactor. The synthesis process involved tetraethyl orthosilicate as a precursor, acetic acid as a catalyst and water as a hydrolysing agent. Transmission electron microscopy (TEM) was used to measure and evaluate the nano-particles size and distribution of the two sol–gel methods implemented. The silica nano-particles synthesized from conventional bench-scale sol–gel method showed poor monodispersity and not in a perfect spherical configuration that has an average size of 95 ± 4 nm. In contrast, highly monodispersed silica nano-particles were produced using a microreactor with an average size of 6 ± 1.3 nm, and the particles were in a perfect spherical configuration. The nano-particles produced from microflow system showed a reduction of 93.68% in size. The results indicated clearly that the micro-mixing associated with the micro-droplets generation is dynamically controlling the shape and size of the formulated nano-particles by controlling the droplet’s internal mixing mechanism. Elsevier Ltd 2020-08-29 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/31547/1/Material%20Today%20-%20Synthesis%20and%20characteristics%20of%20silica%20nano-particles%20using%20modified%20sol%E2%80%93gel%20method%20in%20microreactor.pdf Fiona, W.M. Ling and Abdulbari, Hayder A. and Chin, Sim-Yee (2020) Synthesis and characteristics of silica nano-particles using modified sol–gel method in microreactor. Materials Today: Proceedings, 42. pp. 1-7. ISSN 2214-7853 http://www.elsevier.com/locate/matpr https://doi.org/10.1016/j.matpr.2020.07.563 |
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TP Chemical technology Fiona, W.M. Ling Abdulbari, Hayder A. Chin, Sim-Yee Synthesis and characteristics of silica nano-particles using modified sol–gel method in microreactor |
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Sol-gel is one of the known and widely applied techniques in nano-particles synthesis. However, the conventional batch sol–gel method produces silica nano-particles with uneven shapes and wide size distribution. In the present work, silica nano-particles will be synthesized using a traditional sol–gel method and a modified sol–gel technique by creating a microfluidic reactor. A olydimethylsiloxane microreactor was first designed and fabricated using the direct writing method. The microfluidic reactor was designed with a micro-droplets generation junction where the reactants are mixed to generate droplets where each droplet as an independent reactor. The synthesis process involved tetraethyl orthosilicate as a precursor, acetic acid as a catalyst and water as a hydrolysing agent. Transmission electron microscopy (TEM) was used to measure and evaluate the nano-particles size and distribution of the two sol–gel methods implemented. The silica nano-particles synthesized from conventional bench-scale sol–gel method showed poor monodispersity and not in a perfect spherical configuration that has an average size of 95 ± 4 nm. In contrast, highly monodispersed silica nano-particles were produced using a microreactor with an average size of 6 ± 1.3 nm, and the particles were in a perfect spherical configuration. The nano-particles produced from microflow system showed a reduction of 93.68% in size. The results indicated clearly that the micro-mixing associated with the micro-droplets generation is dynamically controlling the shape and size of the formulated nano-particles by controlling the droplet’s internal mixing mechanism. |
format |
Article |
author |
Fiona, W.M. Ling Abdulbari, Hayder A. Chin, Sim-Yee |
author_facet |
Fiona, W.M. Ling Abdulbari, Hayder A. Chin, Sim-Yee |
author_sort |
Fiona, W.M. Ling |
title |
Synthesis and characteristics of silica nano-particles using modified
sol–gel method in microreactor |
title_short |
Synthesis and characteristics of silica nano-particles using modified
sol–gel method in microreactor |
title_full |
Synthesis and characteristics of silica nano-particles using modified
sol–gel method in microreactor |
title_fullStr |
Synthesis and characteristics of silica nano-particles using modified
sol–gel method in microreactor |
title_full_unstemmed |
Synthesis and characteristics of silica nano-particles using modified
sol–gel method in microreactor |
title_sort |
synthesis and characteristics of silica nano-particles using modified
sol–gel method in microreactor |
publisher |
Elsevier Ltd |
publishDate |
2020 |
url |
http://umpir.ump.edu.my/id/eprint/31547/1/Material%20Today%20-%20Synthesis%20and%20characteristics%20of%20silica%20nano-particles%20using%20modified%20sol%E2%80%93gel%20method%20in%20microreactor.pdf http://umpir.ump.edu.my/id/eprint/31547/ http://www.elsevier.com/locate/matpr https://doi.org/10.1016/j.matpr.2020.07.563 |
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1703960800498024448 |
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13.18916 |