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以聚砜酰胺(PSA)无纺布为支撑层,采用静电纺丝法制备了PSA纳米纤维毡,并用于高温高效空气过滤领域;研究了环境湿度对PSA纤维成形的影响规律,探讨了纺丝时间、纺丝电压、接收距离对纳米纤维毡形貌、孔径、纤维直径及其力学性能的影响,以及纳米纤维毡面密度对滤材过滤效率和压阻的影响。结果表明:当环境相对湿度达到30%时,纳米纤维成形良好;当纺丝电压为22 kV,纺丝时间23 h,接收距离为16 cm时,制备的纳米纤维毡面密度为6.78 g·m~(-2),滤材过滤效率达到99.93%,过滤压阻为754 Pa,纳米纤维毡质量因子为9.63×10~(-3);PSA纳米纤维毡达到了PM2.5过滤的要求,有望在高温过滤领域得到广泛应用。
The PSA nanofiber felt was prepared by electrospinning method using PSA nonwoven fabric as the support layer, and was used in the field of high temperature and high efficiency air filtration. The influence of ambient humidity on the formation of PSA fiber was studied. Time, spinning voltage and receiving distance on the morphology, pore diameter, fiber diameter and mechanical properties of nanofibers, and the effect of nanofiber mat density on filter efficiency and piezoresistivity. The results showed that nanofibers were well formed when the relative humidity reached 30%, and the surface density of nanofibers was 6.78 g · m when the spinning voltage was 22 kV, the spinning time was 23 h and the receiving distance was 16 cm. ~ (-2), filtering efficiency of filtering material reached 99.93%, filtering pressure resistance was 754 Pa, the quality factor of nanofiber felt was 9.63 × 10 ~ (-3); PSA nanofiber mat reached the requirement of PM2.5 filtration, In the field of high temperature filtration has been widely used.