State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China.
Department of Physical Science, University of California, Irvine, CA 92697, USA.
J Hazard Mater. 2019 Jan 15;362:482-494. doi: 10.1016/j.jhazmat.2018.09.009. Epub 2018 Sep 9.
Considerable toxic volatiles (CO and HCN) generation and high fire hazard has definitely compromised the application of thermoplastic polyurethane (TPU). Here, a novel functionalization strategy for bulky h-BN is adopted to obtain the multifunctional CPBN, aiming at the flame retardancy reinforcement of TPU. The multifunctional CPBN is successfully prepared via the wrapping of phytic acid doped polypyrrole shell, following with the adsorption of copper ions. The obviously decreased peak heat release rate, peak smoke production rate and total smoke production values, obtained from cone test, confirms the reduced fire hazard of TPU composite with CPBN. The dramatic suppressions on CO and HCN releases can also be observed from TG-IR test. Tensile test demonstrates that adding CPBN favors the reinforcement in mechanical property of TPU. Thus, the concurrent improvements in flame retardancy and mechanical performance are achieved by incorporating CPBN. This work opens up new avenues for the functionalization of h-BN, and thus facilitates its promising applications in polymer-matrix composite.
大量有毒挥发物（CO 和 HCN）的产生和高火灾风险肯定会影响热塑性聚氨酯（TPU）的应用。在这里，采用了一种新型的大体积氮化硼的功能化策略，以获得多功能 CPBN，旨在增强 TPU 的阻燃性能。通过掺杂植酸的聚苯胺壳的包裹，然后吸附铜离子，成功制备了多功能 CPBN。锥形量热法测试结果表明，CPBN/TPU 复合材料的峰值放热率、峰值烟雾生成率和总烟雾生成值明显降低，证明了 CPBN 的加入降低了 TPU 的火灾风险。从 TG-IR 测试中也可以观察到 CO 和 HCN 释放量的显著抑制。拉伸试验表明，加入 CPBN 有利于增强 TPU 的力学性能。因此，通过加入 CPBN 实现了阻燃性能和力学性能的协同提高。这项工作为 h-BN 的功能化开辟了新的途径，从而促进了其在聚合物基复合材料中的应用前景。
