PSA纳米纤维毡的制备和性能（英文）

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。

Analysis of the Medium Resistance for Constant Pressure Filtration

A mathematical model for constant pressure filtration is established. The distribution of hydraulic pressure within the cake and the medium resistance are measured. The medium resistance Rm is calculated from the suppositional filtration time θm. It is demonstrated that Rm is nearly a constant for a given filter cloth.