Polyphenylene Sulfide Nonwoven Filter Modified with\nPeracetic Acid and Its Usage in Emission Control Under Extreme Conditions

Polyphenylene\nsulfide (PPS) nonwoven filters are extensively utilized\nin industrial filtration processes because of their exceptional resistance\nto solvents and cost-effectiveness. However, the high temperature\nexhaust gases with strong oxidation can irreversibly corrode PPS nonwovens,\nand thus reduce their service life. Here, an oxidation-modified PPS\n(OPPS) nonwoven is reported that assembles excellent oxidation and\nhigh temperature resistance to achieve separation and filtration under\nextreme conditions. This OPPS nonwoven is resistant to oxidizing acid\nsolutions and high temperatures up to 350 °C. In addition, the\nOPPS nonwoven does not melt when burned in a flame. Practical application\ntests demonstrated that the PM<sub>10–2.5</sub> filtration\nefficiency of OPPS nonwoven reaches 90.4%, which is 20% higher than\nthat of PPS nonwoven. Impressively, the OPPS nonwoven enables a PM<sub>10–2.5</sub> filtration efficiency of 92.5% and 94.6% even\nafter aging by 60% HNO<sub>3</sub> solution and 350 °C, respectively.\nThe cost-effectiveness and high performance of OPPS nonwoven present\nsubstantial advantages for flame retardant, thermal insulation, and\ndust filtration applications.