微纳米纤维复合滤纸的过滤性能研究

Study on Filtration Performance of Micro/Nano-fiber Composite Filter Paper

关键词:  空气过滤  复合滤纸  容尘量  反吹性能  微纳米纤维

Key Words:air filtration  composite filter paper  dust holding capacity  back-blowing performance  micro/nano-fiber

摘要:为了探究复合滤纸不同复合方式的性能差异，本研究对两种初始过滤效率接近的复合滤纸进行了效率特征曲线、容尘量和反吹性能的研究。结果表明，静电纺丝复合滤纸最易穿透粒径为150 nm，熔喷复合滤纸最易穿透粒径为200 nm。相同条件下加载A2细灰时，熔喷复合滤纸的阻力增加速率小于静电纺丝复合滤纸；加载油灰混合颗粒时，熔喷复合滤纸的阻力增加速率明显小于静电纺丝复合滤纸，达到终止阻力时熔喷复合滤纸的容尘量为30.1 g/m²，是静电纺丝复合滤纸（9.1 g/m²）的3.3倍。经过反吹测试循环10次后，熔喷复合滤纸的剥离率由90.7%降到54.0%，静电纺丝复合滤纸的剥离率由91.1%降到62.6%。超细层结构疏松有利于提高滤纸容尘量，结构致密则具有更好的反吹性能。

Abstract:In order to explore the performance difference between the composite approach， the efficiency characteristic curve， dust holding capacity and back-blowing performance of two composite filter papers with similar initial filtration efficiency were studied in this paper. The results showed that the most easy to penetrate the particle size of electrospinning composite filter paper and meltblown composite filter paper was 150 nm and 200 nm， the resistance increase rate of meltblown composite filter paper was lower than that of electrospinning composite filter paper when A2 fine dust was loaded under the same conditions. The resistance increase rate of meltblown composite filter paper was significantly lower than that of electrospinning composite filter paper when loading solid-oil mixed particles. The dust holding capacity of the meltblown composite filter paper was 30.1 g/m² when the termination resistance was reached， which was 3.3 times of electrospinning composite filter paper（9.1 g/m²）. After 10 back-blowing cycles， the peel rate of meltblown composite filter paper was decreased from 90.7% to 54.0%， and peal rate of electrospinning composite filter paper was decreased from 91.1% to 62.6%. The loose structure of the ultrafine layer was beneficial to increase the dust holding capacity of filter paper， and the compact ultrafine layer had better back-blowing performance.