School of Materials Science and Engineering, Beijing Institute of Technology, 100081, China; National Engineering Research Center of Flame Retardant Materials, Beijing Institute of Technology, Beijing, 100081, China.
School of Materials Science and Engineering, Beijing Institute of Technology, 100081, China; National Engineering Research Center of Flame Retardant Materials, Beijing Institute of Technology, Beijing, 100081, China.
J Hazard Mater. 2020 Aug 5;395:122604. doi: 10.1016/j.jhazmat.2020.122604. Epub 2020 Apr 2.
Aluminum hypophosphite (AHP) is a high-efficiency phosphorus-based flame retardant with high P content, which is widely used in Polyamide 6 (PA6). However, AHP releases phosphine gas (PH) at high temperatures, which is highly toxic to human's health and environment. Metal-organic frameworks (MOFs) have porous structure exhibiting high performance in gas adsorption. Therefore, mesoporous iron (III) carboxylate [MIL-100 (Fe)] was synthesized in this work and employed to study the adsorption capacity of toxic PH in PA6/AHP composite during processing. AHP was combined with melamine cyanurate (MCA) and MIL-100 (Fe) followed by blending with PA6 to prepare PA6 composites (PA6/MA and PA6/MAF). PA6/MAF with the weight ratio of 5:5 performed well in inhibiting the release of PH during the processing of composite as well as the accelerated thermal experiment devised by our group. Besides, PA6/MAF (5:5) showed relatively low fire hazard reflected by the reduction of the peak of heat release rate of PA6 composite from 962 to 260 kW/m compared with that of pure PA6 in the cone calorimeter test, and MIL-100 (Fe) along with MCA also presented synergistic effect in suppressing the emission of carbon monoxide. The subtle selection of MOFs herein has the potential to be used as a promising synergist for hazardous gases released from polymer composites to improve the occupational and fire safety in the society.
次磷酸铝（AHP）是一种含磷量高的高效阻燃剂，广泛应用于聚酰胺 6（PA6）中。然而，AHP 在高温下会释放出磷化氢（PH）气体，对人体健康和环境有高度毒性。金属有机骨架（MOFs）具有多孔结构，在气体吸附方面表现出优异的性能。因此，本工作合成了介孔铁（III）羧酸盐[MIL-100（Fe）]，并将其用于研究 PA6/AHP 复合材料在加工过程中对有毒 PH 的吸附能力。将 AHP 与三聚氰胺氰尿酸盐（MCA）和 MIL-100（Fe）结合，然后与 PA6 共混制备 PA6 复合材料（PA6/MA 和 PA6/MAF）。当重量比为 5:5 时，PA6/MAF 在抑制复合过程中 PH 的释放以及我们小组设计的加速热实验方面表现良好。此外，与纯 PA6 相比，在锥形量热仪测试中，PA6 复合材料的热释放率峰值从 962kW/m 降低到 260kW/m，表明 PA6/MAF（5:5）的火灾危险性相对较低，并且 MIL-100（Fe）和 MCA 也表现出协同抑制一氧化碳排放的效果。本文中 MOFs 的细微选择有可能被用作聚合物复合材料中释放的危险气体的有前途的协同剂，以提高社会的职业和消防安全。
