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过程工程学报 ›› 2016, Vol. 16 ›› Issue (5): 862-869.DOI: 10.12034/j.issn.1009-606X.216144

• 材料工程专栏 • 上一篇    下一篇

复合聚酰亚胺滤毡的制备及其滤除PM2.5颗粒

尚磊明1,李蕾1,李艳香1,杨传芳2   

  1. 1. 中国科学院过程工程研究所绿色过程与工程重点实验室
    2. 中国科学院过程工程研究所分离工程与工程青年实验室
  • 收稿日期:2016-02-29 修回日期:2016-04-21 出版日期:2016-10-20 发布日期:2016-10-14
  • 通讯作者: 杨传芳 cfyang@ipe.ac.cn

Preparation of Composite Polyimide Filtration Filter and Its Application in PM2.5 Removal

SHANG Lei-ming 1,LI Lei 1,LI Yan-xiang 1,YANG Chuan-fang 2   

  1. 1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering , Chinese Academy of Sciences
    2. Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2016-02-29 Revised:2016-04-21 Online:2016-10-20 Published:2016-10-14
  • Contact: YANG Chuan-fang cfyang@ipe.ac.cn

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被引次数

4

摘要： 以260~350 g/m2的芳纶无纺毡为基底层、40~60 g/m2的耐高温无纺布为保护层，通过静电喷雾将高温粘合剂均匀涂布在基底层上，再采用静电纺丝技术将直径150~400 nm的可溶性聚酰亚胺(P84)纳米纤维均匀纺制其上，附上保护层，热压固化使3层材料紧密结合，得到三明治结构的耐高温纳米纤维复合过滤毡，用其去除模拟气溶胶(粒径0.3~10 ?m的NaCl)颗粒. 结果表明，复合滤毡粘结强度超过1000 kPa，粘合剂对基底性能影响较小，少量纳米纤维可有效提高材料的过滤效率，对粒径2.0 ?m以上和1.0~2.0 ?m NaCl颗粒的过滤效率分别达100%和99.5%以上.

关键词: 静电纺丝, 聚酰亚胺, PM2.5颗粒, 过滤效率, 纳米纤维, 复合滤毡

Abstract: A composite felt with sandwiched structure was prepared by evenly depositing basis of 150~400 nm electrospun soluble polyimide (P84) nanofibers on substrates of aramid nonwoven fabrics of 260~350 g/m2. The substrates were pre-sprayed electrostatically with high-temperature adhesives to bind the nanofibers. Another protective layer made of high-temperature nonwovens with basis of 40~60 g/m2 was used to shield the nanofibers. The composite was then hot-pressed to gain the binding strength as the adhesives solidified, to remove the simulated dusts, 0.3~10 ?m NaCl aerosols. The results showed that the property of the substrate was less affected by the adhesive, and the composite had a strength higher than 1000 kPa. Even a small amount of P84 nanofibers can obviously enhanced the filtration efficiency. The filtration efficiency of the composite reached to 100% to the particles equal and greater than 2.0 ?m, 99.5% to the particles 1.0~2.0 ?m in diameter.

Key words: electrospinning fiber, polyimide, PM2.5 particles, filtration efficiency, nanofiber, composite felt