Qian Yi, Su Wenyuan, Li Long, Fu Haoyan, Li Jiayin, Zhang Yihao
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
Polymers (Basel). 2022 Apr 7;14(8):1506. doi: 10.3390/polym14081506.
The development of high-performance thermoplastic polyurethane (TPU) with high flame retardancy and low toxicity has always been the focus of its research. In this paper, the novel 3D hollow layered double hydroxide/molybdenum disulfide (LDH/MoS) hybrid materials were synthesized by hydrothermal method using the MIL-88A as in situ sacrificial template and MoS as synergistic flame retardant. Among all TPU composites, the peak heat release rate, total heat release rate, and total smoke release rate of TPU/NiFeTb-LDH/MoS were reduced by 50.9%, 18.2%, and 35.8% compared with pure TPU, respectively. The results of the thermogravimetric infrared analysis demonstrated that the contents of combustible volatiles (hydrocarbons) and toxic volatiles (CO and HCN) emitted from TPU/LDH/MoS were significantly reduced, indicating that LDH/MoS hybrid materials can dramatically enhance the fire safety of TPU composites. Combined with the analysis of carbon residues and thermal stability of TPU composites, the enhanced flame retardancy and smoke suppression performances are primarily attributed to the catalytic carbonization of LDH and the physical barrier effect of MoS.
开发具有高阻燃性和低毒性的高性能热塑性聚氨酯（TPU）一直是其研究的重点。本文以MIL-88A为原位牺牲模板，以二硫化钼（MoS）为协同阻燃剂，通过水热法合成了新型三维中空层状双氢氧化物/二硫化钼（LDH/MoS）杂化材料。在所有TPU复合材料中，TPU/NiFeTb-LDH/MoS的热释放峰值速率、总热释放速率和总烟雾释放速率分别比纯TPU降低了50.9%、18.2%和35.8%。热重红外分析结果表明，TPU/LDH/MoS释放的可燃挥发物（碳氢化合物）和有毒挥发物（CO和HCN）含量显著降低，表明LDH/MoS杂化材料可显著提高TPU复合材料的消防安全性能。结合TPU复合材料的残炭和热稳定性分析，其增强的阻燃和抑烟性能主要归因于LDH的催化碳化作用和MoS的物理阻隔作用。
