| Effect of high temperature gas environment on the properties of PTFE / PPS composite membrane |
| Authors： Cui Kaihui, Feng Shasha, Zhou Ming, Zhong Zhaoxiang, Xing Weihong |
| Units： Membrane Science and Technology Research Center，Nanjing Tech University，State Key Laboratory of Materials—Oriented Chemical Engineering，Nanjing 210009，China |
| KeyWords： PTFE / PPS composite membrane; Air aging; sulfur dioxide; Mechanical properties; Response surface method |
| ClassificationCode：TQ317.9；TB304 |
| year,volume(issue):pagination： 2023,43(2):49-58 |
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Abstract： |
| PTFE/PPS composite membrane is one of the most widely used composite membranes in the field of low and medium temperature dust removal, and its service life is significantly affected by flue gas conditions. According to the application environment of PTFE/PPS composite membrane, the anti-aging performance of the membrane was tested by high temperature gas corrosion. The effect of oxygen on the aging resistance of PTFE/PPS composite membrane was studied, and the response surface of tensile strength of the membrane was established based on the SO2 concentration, corrosion temperature and time. The results showed that the zonal fracture strength of the PPS support increased due to the oxidative cross-linking reaction in oxygen atmosphere, and reached the maximum value of 2132.2 N after 48 hours of 200 ℃ aging. From the response surface, increasing the corrosion temperature and SO2 concentration has a significant effect on the fracture tensile properties of PTFE/PPS composite membrane. When the temperature was increased from 180 ℃ to 240 ℃, the meridional fracture strength decreased to 90.97% of the original; When the SO2 concentration was increased from 2096 mg/m3 to 2620 mg/m3, the warp breaking strength attenuated to 98.12% of the original. The results suggest that PTFE/PPS composite membrane has good stability in the field of high temperature flue gas purification. |
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Funds： |
| 国家重点研发计划项目（2018YFE0203500）国家自然科学基金（21878184，21921006） |
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AuthorIntro： |
| 崔开慧（1997-），女，江苏扬州，硕士生，主要从事PTFE复合膜应用性能研究， E-mail：cuikh@njtech.edu.cn |
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Reference： |
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