Microfluidic fabrication of polysiloxane/dimethyl methylphosphonate flame-retardant microcapsule and its application in silicone foams
Fu-Ru Kang
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Search for more papers by this authorCorresponding Author
Jun Deng
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Correspondence
Jun Deng, School of Safety Science and Engineering; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an 710054, PR China.
Email: [email protected]
Dong-Sheng Jiao, Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, PR China.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Dong-Sheng Jiao
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230027 PR China
Correspondence
Jun Deng, School of Safety Science and Engineering; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an 710054, PR China.
Email: [email protected]
Dong-Sheng Jiao, Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, PR China.
Email: [email protected]
Search for more papers by this authorLi-Qun He
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230027 PR China
Search for more papers by this authorWei-Feng Wang
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Search for more papers by this authorZhi-Chao Liu
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Search for more papers by this authorFu-Ru Kang
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Search for more papers by this authorCorresponding Author
Jun Deng
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Correspondence
Jun Deng, School of Safety Science and Engineering; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an 710054, PR China.
Email: [email protected]
Dong-Sheng Jiao, Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, PR China.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Dong-Sheng Jiao
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230027 PR China
Correspondence
Jun Deng, School of Safety Science and Engineering; Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an 710054, PR China.
Email: [email protected]
Dong-Sheng Jiao, Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, PR China.
Email: [email protected]
Search for more papers by this authorLi-Qun He
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230027 PR China
Search for more papers by this authorWei-Feng Wang
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Search for more papers by this authorZhi-Chao Liu
School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an University of Science and Technology, Xi'an, 710054 PR China
Search for more papers by this authorAbstract
A novel and versatile route for fabricating flame-retardant microcapsules via microfluidics technology is reported. The flame-retardant microcapsules were prepared with a dimethyl methylphosphonate (DMMP) core and an ultraviolet-curable (UV-curable) polysiloxane shell. Furthermore, a UV-curable polysiloxane was synthesized. The synthesis mechanism of UV-curable polysiloxane and the curing mechanism of flame-retardant microcapsules were analyzed. To verify that DMMP was encapsulated in the microcapsules, X-ray fluorescence was used before and after microencapsulation. The resulting microcapsules were well monodispersed and exhibited a good spherical shape with a smooth surface. In addition, the size of the microcapsules decreased dramatically with an increasing flow-rate ratio of the middle-/inner-phase or outer-phase flow rate. The thermal stability of the microcapsules was worse than shell materials but superior to DMMP. Silicone foams (SiFs) with microcapsules prepared using a dehydrogenation method achieved a relatively higher limiting oxygen-index value than the pure SiF, which indicated that the microcapsules could enhance the flame retardation of SiFs effectively. Because of the polysiloxane shell, the microcapsules had good compatibility with SiFs, and the influence of microcapsules on the mechanical properties of SiFs was unremarkable.
Supporting Information
| Filename | Description |
|---|---|
| pta4560-sup-0001-VideoS1.mp4MPEG-4 video, 9.7 MB |
Video S1. Fabrication of flame-retardant microcapsule |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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