高温气相环境对PTFE/PPS复合膜性能影响
作者:崔开慧,冯厦厦,周 明,仲兆祥,邢卫红
单位: 南京工业大学 膜科学技术研究所,材料化学工程国家重点实验室,南京 210009
关键词: PTFE/PPS复合膜;空气老化;二氧化硫;力学性能;响应面方法
DOI号:
分类号: TQ317.9;TB304
出版年,卷(期):页码: 2023,43(2):49-58

摘要:
 聚四氟乙烯/聚苯硫醚(PTFE/PPS)复合膜是除尘领域运用最广泛的复合膜之一,其使用寿命受烟气参数影响显著。本研究针对PTFE/PPS复合膜的实际应用条件,通过高温气相腐蚀对PTFE/PPS复合膜进行抗老化性能测试,在120 ℃-240 ℃温度范围内,以空气为气氛,研究了氧存在条件对PTFE/PPS复合膜的耐老化性能影响;基于腐蚀气体(SO2)浓度、腐蚀温度与时间,建立了膜材料拉伸强度的响应曲面。研究结果表明,氧气使复合膜中的PPS支撑体产生氧化交联反应使其纬向断裂强力有所上升,200 ℃老化48 h后达到最大值2132.2 N;由响应面可知增加温度与SO2浓度对PTFE/PPS复合膜的断裂拉伸性能的衰减影响显著,当温度从180 ℃增加到240 ℃时,其经向断裂强力衰减至初始值的90.97%;当SO2浓度由2096 mg/m3增加至2620 mg/m3时,经向断裂强力衰减至初始值的98.12%。该工作为复合膜在烟气净化中的应用条件优化提供了依据。
 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.

基金项目:
国家重点研发计划项目(2018YFE0203500)国家自然科学基金(21878184,21921006)

作者简介:
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

参考文献:
  [1] 朱召平, 娄彤, 信明勋, 等. 高温超净电袋复合除尘技术及其在水泥行业的应用前景探讨[J]. 水泥, 2020, 47(4): 51-54.
 [2] 崔全禹. 燃煤锅炉烟气除尘技术分析与选型[J]. 中国电力企业管理, 2022, 30(18): 94-95.
 [3] Xu Q, Wang G, Xiang C, et al. Preparation of a novel poly (ether ether ketone) nonwoven filter and its application in harsh conditions for dust removal[J]. Sep Purif Technol, 2020, 253(15): 117555.
 [4] Jiang D, Zhang W, Liu J, et al. Filtration and regeneration behavior of polytetrafluoroethylene membrane for dusty gas treatment[J]. Korean J Chem Eng, 2008, 25(4): 744-753.
 [5] Huang J, Zhang J, Hao X, et al. Study of a new novel process for preparing and co-stretching PTFE membrane and its properties[J]. Eur Polym J, 2004, 40(4): 667-671.
 [6] 李小强. 布袋除尘器设计选型中的几个关键影响因素[J]. 四川有色金属, 2022, 29(01): 44-47.
 [7] 侯俊. PPS+PTFE复合针刺毡滤料的研究及应用[J]. 科技与创新, 2016, 3(04): 105.
 [8] 李东梁, 武文斌. 袋式除尘器的设计及过滤材料的选择[J]. 粮食与食品工业, 2009, 16(02): 32-34.
 [9] 邢剑. 聚苯硫醚抗氧化改性及其结构与性能的研究[D]: 江南大学, 2017.
[10] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. GB/T 6719-2009.袋式除尘器技术要求[Z]. 北京: 中国标准出版社, 2009.
[11] Company C C P. Chemical Resistance Guide[ES/OL]. [2022-08-07]. http://www.cpchem.com/bl/rytonpps/en-us/Pages/ChemicalResistanceGuide.aspx.
[12] 王玉华. 两种滤料耐腐蚀性研究[D]: 东北大学, 2005.
[13] Belgada A, Charik F Z, Achiou B, et al. Optimization of phosphate/kaolinite microfiltration membrane using Box–Behnken design for treatment of industrial wastewater[J]. Journal of Environmental Chemical Engineering, 2021, 9(1): 104972.
[14] Kamelian F S, Mohammadi T, Naeimpoor F. Fast, facile and scalable fabrication of novel microporous silicalite-1/PDMS mixed matrix membranes for efficient ethanol separation by pervaporation[J]. Sep Purif Technol, 2019, 229(15): 115820.
[15] 刘宇, 何本桥, 李建新. 响应面法优化联苯聚酰胺中空纤维复合膜制备工艺[J]. 膜科学与技术, 2011, 31(6): 19-24.
[16] 国家棉纺织产品质量监督检验中心, 中国纺织总会标准化研究所, GB/T3923.1-2013, 纺织品织物拉伸性能 第1部分:断裂强力和断裂伸长率的测定条样法[S]. 北京:国家技术监督局, 2013.
[17] 上海纺织科学研究所, 国家棉纺织品质量监督检验中心, GB/T 5453-1997, 纺织品织物透气性的测定[S]. 北京:国家技术监督局, 1997.
[18] 杭州水处理中心, HY/T 039-1995, 微孔滤膜孔性能测定方法[S]. 北京:国家海洋局, 1995.
[19] 李文刚, 路海冰, 黄标, 等. 热处理聚苯硫醚的红外光谱分析[J]. 合成纤维工业, 2012, 35(2): 71-73.
[20] 刘艳伟, 芦艾, 杨海波. 聚苯硫醚热交联特性研究进展[J]. 高分子通报, 2012, (08): 74-79.

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