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合成纤维过滤材料越来越多地被应用于高温烟气过滤器中。聚苯撑苯并二噁唑(PBO)纤维具有强度大、模量高、耐热性能突出、密度小、耐化学性好等特点。对自制的初生PBO纤维进行了高温热处理并对其进行了耐热及耐酸性能的测试。热处理后,PBO纤维的拉伸强度由2.86GPa提高到了3.94GPa;长期使用温度达到600℃;纤维在60%浓度的浓硫酸和63%浓度的浓硝酸中浸泡60d以后,拉伸强度依然可以分别保持在2.71GPa和2.11GPa。同其它高温烟气过滤材料用纤维相比,PBO纤维具有明显的优势。
Synthetic fiber filters are increasingly being used in high temperature flue gas filters. Polyphenylene benzobisoxazole (PBO) fiber with high strength, high modulus, outstanding heat resistance, low density, good chemical resistance and so on. The homemade PBO fiber was heat-treated at high temperature and tested for heat resistance and acid resistance. After heat treatment, the tensile strength of PBO fiber increased from 2.86GPa to 3.94GPa, while the long-term temperature reached 600 ℃. After the fiber was soaked in 60% concentrated sulfuric acid and 63% concentrated nitric acid for 60 days, the tensile strength could still be separately Maintained at 2.71GPa and 2.11GPa. PBO fibers offer significant advantages over other fibers for high temperature flue gas filtration materials.