State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China.
School of Civil Engineering and Environmental Engineering, Anhui Xinhua University, Hefei, Anhui 230088, China.
J Colloid Interface Sci. 2018 Nov 1;529:345-356. doi: 10.1016/j.jcis.2018.06.038. Epub 2018 Jun 19.
High fire hazard of epoxy resin (EP) has been an unavoidable obstruction on its wide application. Here, a manganese phytate dotted polyaniline shell enwrapped carbon nanotube (MPCNT) is facilely constructed and employed as flame retardant for EP. By adding 4.0 wt% MPCNT, the peak heat release rate, total heat release values, peak CO yields and total CO yields are decreased by 27.2, 12.3, 44.8, and 23.3%, respectively. The decreased absorbance intensity of toxic aromatic volatiles is also observed. Then, a tripartite cooperative flame retardant mechanism (a continuous barrier network, catalytic charring function of phytate, and catalytic activity of MnP/C system) is proposed. Furthermore, the storage modulus of EP composites with 2.0 and 4.0 wt% MPCNT are increased by 23.0 and 25.8% at 40 °C, respectively. Thus, the simultaneous reinforcements in fire safety and mechanical performance of EP are successfully achieved. This work may represent a significant step forward in the facile construction of functionalized carbon materials for achieving their whole potentials in polymer-matrix composite.
环氧树脂（EP）的高火灾隐患一直是其广泛应用不可避免的障碍。在这里，一种锰植酸盐点聚苯胺壳包裹碳纳米管（MPCNT）被简便地构建并用作 EP 的阻燃剂。通过添加 4.0wt%的 MPCNT，最大热释放速率、总热释放值、峰值 CO 产率和总 CO 产率分别降低了 27.2%、12.3%、44.8%和 23.3%。还观察到有毒芳香挥发物的吸收强度降低。然后，提出了一种三方协同阻燃机理（连续的阻挡网络、植酸盐的催化碳化功能和 MnP/C 体系的催化活性）。此外，添加 2.0wt%和 4.0wt%MPCNT 的 EP 复合材料的储能模量在 40°C 时分别提高了 23.0%和 25.8%。因此，成功地实现了 EP 火灾安全性和机械性能的同时增强。这项工作可能代表了在构建功能性碳材料方面向前迈出的重要一步，以充分发挥其在聚合物基体复合材料中的潜力。
