Boosting fire safety and mechanical performance of thermoplastic polyurethane by the face-to-face two-dimensional phosphorene/MXene architecture  

作　　者：Yong Luo Yuhui Xie Wei Geng Junhan Chu Hua Wu Delong Xie Xinxin Sheng Yi Mei 

机构地区：[1]Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials,The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province,Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,China [2]Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China [3]Department of Chemistry and Applied Biosciences,Institute for Chemical and Bioengineering,ETH Zurich,Zurich 8093,Switzerland

出　　处：《Journal of Materials Science & Technology》2022年第34期27-39,共13页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21908031);Scientific Research Funds of Yunnan Education Department(No.2021Y111)。

摘　　要：Black phosphorus(BP), as one of the most promising fillers for flame retarding polymer, has been seriously limited in practical application, due to the agglomeration and poor structural stability challenges.Here, the BP was modified by MXene and polydopamine(PDA) via ultrasonication and dopamine modification strategy to improve the structural stability and dispersibility in the matrix. Then, the obtained(BP-MXene@PDA) nanohybrid was employed to promote the mechanical performance, thermal stability,and flame retardancy of thermoplastic polyurethane elastomer(TPU). The resultant TPU composite containing 2 wt.% of BP1-MXene2@PDA showed a 19.2% improvement in the tensile strength and a 13.8%increase in the elongation at break compared to those of the pure TPU. The thermogravimetric analysis suggested that BP-MXene@PDA clearly enhances the thermal stability of TPU composites. Furthermore,the introduction of the BP-MXene@PDA nanohybrids could considerably improve the flame retardancy of TPU composite, i.e., 64.2% and 27.3% decrease in peak heat release rate and total heat release, respectively. The flame-retardant mechanisms of TPU/BP-MXene@PDA in the gas phase and condensed phase were investigated systematically. This work provides a novel strategy to simultaneously enhance the fire safety and mechanical properties of TPU, thus expanding its industrial applications.

关 键 词：Thermoplastic polyurethane elastomer Black phosphorus MXene Mechanical properties Flame retardancy 

分 类 号：TQ334.1[化学工程—橡胶工业] TB332[一般工业技术—材料科学与工程]