Long-term engaged in flame retardant materials, polymer/clay nanocomposites research work. At present, the main research includes new nanocomposite flame retardants, polymer nanocomposite flame retardants with different topological structures, efficient two-dimensional material stripping methods, integrated intumescent flame retardants and so on. In the preparation of nanocomposite flame retardants, the concept of green and sustainable synthesis using only water as solvent or solvent-free is always followed. He also served as deputy Secretary-General of the flame retardant Committee of China Petrochemical Association. He is also the deputy chairman of the Emergency Capacity Assessment Working Committee of China Emergency Management Society.
He has published more than 20 SCI papers, applied for more than 10 patents, authorized 8, edited/participated in 2 monographs.
Research Projects (hosted) :
Youth Foundation of National Natural Science Foundation of China, Preparation and Research of Novel Nanocomposite flame retardant Montmorillonite - Melamine cyanurate (51303012) Completed,
General Analysis of physical and chemical properties of the ground pillars of the Oil Painting Protection Project of the Temple of Putuo Zongcheng,
Research on new flame-retardant materials in flame-retardant tape cigarette paper.

Flame retardant Materials, Polymer Nanocomposites, Two-dimensional material stripping

2001.9-2005.6 School of Materials, Beijing Institute of Technology, Polymer Materials Science and Engineering, Bachelor of Engineering 2005.9-2010.1 School of Materials Science, Beijing Institute of Technology, Ph.D. in Materials Science

2010.3-2011.12 School of Chemistry, Marquette University, Postdoctoral Fellow
2012.3-2019.6 Beijing Institute of Technology School of Materials, Lecturer, Master Tutor
2019.7-present Associate Professor, Master Tutor, School of Materials, Beijing Institute of Technology

1. Peifan Qin, Deqi Yi*, Jianwei Hao, Xinming Ye, Ming Gao, Tinglu Song. Fabrication of melamine trimetaphosphate 2D supermolecule and its superior performance on flame retardancy, mechanical and dielectric properties of epoxy resin. Composites Part B. 225, 109269, 2021.
2. Qin Peifan, Yi Deqi*, Jianwei Hao. Fast prepare exfoliated montmorillonite water suspension with assistance of melamine cyanurate and the superlattice obtained by self-assembly. Polym. Adv. Technol.2021, online.
3. Qin Peifan, Yi Deqi*, Jianwei Hao. Bi-layer molybdenum disulfide obtains from molybdenum disulfide-melamine cyanurate superlattice with a thermal shock. Advanced Powder Technology. 2021, online.
4. Qin Peifan, Yi Deqi*, Jun Xing, Mingzhu Zhou, Jianwei Hao. Study on flame retardancy of ammonium polyphosphate/montmorillonite nanocompound coated cellulose paper and its application as surface flame retarded treatment for polypropylene. J. Therm. Anal. Calorim. 2021, online.
5. Zhang Lichen, Yi Deqi*, Hao Jianwei, Gao Ming. One-step treated wood by using natural source phytic acid and uracil for enhanced mechanical properties and flame retardancy. Polym. Adv. Technol. 2021, 32(3), 1176.
6. Zhang Lichen, Yi Deqi*, Hao Jianwei. Poly(diallyldimethylammonium) and polyphosphate polyelectrolyte complex as flame retardant for char-forming epoxy resins. Journal of Fire Science. 2020,38(4),333-347.
7. Qin Peifan, Yi Deqi*, Meng Qi, Sun Aijun, Sun Jingqi, Zhang Zengjun, Hao Jianwei. Study and Restoration of the Yi Ma Wu Hui Layer of the Ancient Coating on the Putuo Zongcheng Temple. International Journal of Architectural Heritage. 2020, online.
8. Zhang Lichen, Yi Deqi*, Hao Jianwei. Poly (diallyldimethylammonium) and polyphosphate polyelectrolyte complexes as an all-in-one flame retardant for polypropylene. Polym. Adv. Technol. 2020,31(2), 260-272.
9. Min Zhao, Deqi Yi*, Rongjie Yang. Enhanced mechanical properties and fire retardancy of polyamide 6 nanocomposites based on interdigitated crystalline montmorillonite-melamine cyanurate. Journal of Applied Polymer Science. 2018, 135(13), 46039.
10. Min Zhao, Deqi Yi*, Giovanni Camino, Alberto Frache, Rongjie Yang. Interdigitated crystalline MMT-MCA: Preparation and characterization. Polym. Adv. Technol. Polym. Adv. Technol. 2018, 29, 22-29.
11. Min Zhao, Deqi Yi*, Giovanni Camino, Alberto Frache, Rongjie Yang. Interdigitated crystalline MMT-MCA in polyamide 6. RSC Advances. 2017, 7(2), 861-869.
12. Deqi Yi*, Huixin Yang, Min Zhao, Le Huang, Giovanni Camino, Alberto Frache, Rongjie Yang. A novel, low surface charge density, anionically modified montmorillonite for polymer nanocomposites. RSC Advances. 2017, 7(10), 5980-5988. 代表性著作： 杨荣杰, 仪德启. 聚磷酸铵. 科学出版社. 2015.