The Flame Retardant Material and Processing Technology Engineering Research Center of Hebei Province, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China.
College of Science, Agriculture University of Hebei, Baoding, 071000, China.
Chemosphere. 2024 Jan;346:140521. doi: 10.1016/j.chemosphere.2023.140521. Epub 2023 Nov 2.
The traditional method of preparing graphene will cause serious environmental pollution, and the combustion of polymer materials will seriously harm people's health. In this paper, a Cu-MOF-coated graphene composite flame retardant (G@Cu-MOF) rich in flame retardant elements such as B and N was synthesized through green mechanical ball milling method. Flame retardants reduce the threat to the environment and people's lives and property. After adding 6 wt% G@Cu-MOF, the peak heat release rate, total heat release rate, CO production and CO production of epoxy resin (EP) composite samples decreased by 55, 14, 59, and 55%, respectively. This type of Cu-MOF releases incombustible gases such as boron trifluoride (BF) and ammonia (NH) during combustion, diluting the concentration of combustible gases and producing copper borate in the condensed phase. Cu is reduced to Cu, and boron compounds are converted into boron oxides. The thermal conductivity of graphene can reduce the temperature of the matrix, and has good flame retardancy. It synergistically acts with Cu-MOF to promote the formation of high-quality residual char, and can significantly inhibit the heat and smoke release of EP. It plays a role in flame retardancy and protecting the substrate from fire. This study provides a new approach for preparing graphene hybrid flame retardants through mechanical ball milling, in order to improve the flame retardancy of EP and suppress the release of smoke and toxic gases.
传统的石墨烯制备方法会造成严重的环境污染，而聚合物材料的燃烧会严重危害人们的健康。本文通过绿色机械球磨法合成了一种富含硼、氮等阻燃元素的 Cu-MOF 包覆石墨烯复合材料阻燃剂（G@Cu-MOF）。阻燃剂减少了对环境和人们的生命财产的威胁。添加 6wt% G@Cu-MOF 后，环氧树脂（EP）复合材料样品的峰值放热率、总放热率、CO 生成量和 CO 生成量分别降低了 55%、14%、59%和 55%。这种类型的 Cu-MOF 在燃烧时会释放出不可燃气体，如三氟化硼（BF）和氨气（NH），稀释可燃气体的浓度，并在凝聚相中生成硼酸铜。Cu 被还原为 Cu，硼化合物转化为氧化硼。石墨烯的热导率可以降低基体温度，具有良好的阻燃性。它与 Cu-MOF 协同作用，促进高质量残炭的形成，显著抑制 EP 的热释放和烟雾释放。它在阻燃和保护基材免受火灾方面发挥作用。本研究通过机械球磨为制备石墨烯杂化阻燃剂提供了一种新方法，以提高 EP 的阻燃性并抑制烟雾和有毒气体的释放。
