Emissions from power generation and municipal waste incineration sources are primarily at high temperatures and contain corrosive gases, particulate pollutants and are enormously challenging on the performance of the filtration systems in use. Here, polyphenylene sulfide (PPS) nonwoven fabric, a primary material used commercially in such settings, is modified with a polybenzoxazine precursor as a coating to deliver improved thermal and oxidation resistance to the fibrous substrate. The polybenzoxazine precursor undergoes chain propagation and crosslinking upon the treatment process to provide a protective layer over the PPS fibers such that enhanced structural stability in a harsh environment was demonstrated. We have shown the improved overall tensile strength (+15%), Young’s modulus (+26%), and more hydrophobic nature of the modified PPS fabric, while the superior environmental stability and better filtration performance could be achieved. Such methodology may lead to higher service temperature and extended service time of the PPS filtration bags in harsh fire exhaustion airstreams encountered in power plants or municipal garbage incineration facilities. The crosslinkable benzoxazine could also be the most cost-effective high temperature coating layer on fibers, enabling future high-performance air filtration materials.

发电和城市垃圾焚烧源的排放物主要处于高温状态，含有腐蚀性气体、颗粒污染物，对使用中的过滤系统的性能具有极大的挑战。在这里，聚苯硫醚 (PPS) 非织造布是在此类环境中商业上使用的主要材料，它使用聚苯并恶嗪前体作为涂层进行改性，以提高纤维基材的耐热性和抗氧化性。聚苯并恶嗪前体在处理过程中经历链增长和交联，以在 PPS 纤维上提供保护层，从而证明在恶劣环境中增强的结构稳定性。我们已经展示了改进的整体拉伸强度 (+15%)、杨氏模量 (+26%) 和改性 PPS 织物的疏水性，同时可以实现优越的环境稳定性和更好的过滤性能。这种方法可能会导致 PPS 过滤袋在发电厂或城市垃圾焚烧设施中遇到的严酷的火灾排放气流中更高的使用温度和更长的使用时间。可交联的苯并恶嗪也可能是纤维上最具成本效益的高温涂层，可用于未来的高性能空气过滤材料。