纺织学报 ›› 2021, Vol. 42 ›› Issue (05): 31-37.doi: 10.13475/j.fzxb.20200805707

• 纤维材料 • 上一篇    下一篇

空气过滤用高容尘膨体聚四氟乙烯复合材料的制备及其性能

刘朝军1,2, 刘俊杰1(), 丁伊可2, 马少锋2, 张秀琴2, 张建青2   

  1. 1.天津大学 天津市室内空气环境质量监控重点实验室, 天津 300072
    2.浙江金海环境技术股份有限公司, 浙江 绍兴 311817
  • 收稿日期:2020-08-12 修回日期:2021-02-05 出版日期:2021-05-15 发布日期:2021-05-20
  • 通讯作者: 刘俊杰
  • 作者简介:刘朝军(1981—),男,高级工程师,博士。主要研究方向为空气过滤材料及过滤系统。
  • 基金资助:
    国家重点研发计划项目(2018YFC0705202)

Preparation and properties of expanded polytetrafluoroethylene membrane composites with high dust holding capacity for high efficiency air filtration

LIU Chaojun1,2, LIU Junjie1(), DING Yike2, MA Shaofeng2, ZHANG Xiuqin2, ZHANG Jianqing2   

  1. 1. Tianjin Key Laboratory of Indoor Air Environmental Quality Control, Tianjin University, Tianjin 300072, China
    2. Zhejiang Goldensea Environment Technology Co., Ltd., Shaoxing, Zhejiang 311817, China
  • Received:2020-08-12 Revised:2021-02-05 Online:2021-05-15 Published:2021-05-20
  • Contact: LIU Junjie

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摘要：

为提高膨体聚四氟乙烯 (ePTFE)膜的容尘性能,拓展ePTFE膜复合材料在净化领域的应用,通过将不同厚度、不同纤维直径以及驻极处理后的聚丙烯熔喷过滤材料作为容尘层与ePTFE膜复合制备ePTFE复合材料,并对复合材料的容尘性能以及微观结构进行分析。结果表明:复合材料的容尘量随容尘层厚度增加呈线性增加趋势,容尘层厚度为0.45 mm时,复合材料的容尘量达到6.37 g/m2,较ePTFE膜提高了266%;复合材料的容尘量随容尘层纤维直径的减小呈增加趋势,容尘层纤维直径为1.462 μm时,复合材料的容尘量达7.96 g/m2,较ePTFE膜提高了357%;驻极处理后,容尘层纤维直径为3.611 μm时,复合材料的容尘量较驻极处理前提高了136%。

关键词: 膨体聚四氟乙烯, 玻璃纤维滤纸, 聚丙烯熔喷过滤材料, 容尘量, 空气过滤

Abstract:

In order to improve the dust holding capacity of expanded polytetrafluoroethylene (ePTFE) membrane, and expand the application of ePTFE membrane composite materials in the field of clean room purification, polypropylene (PP) melt blown filter material with different thickness, fiber diameter and electret treatment was used as dust holding layer for the preparation of ePTFE membrane composite. The dust holding performance and microstructure of the composite were analyzed. The results show that the dust holding capacity of the composites increases linearly with the increase of the dust layer thickness. When the dust layer thickness is 0.45 mm, the dust holding capacity of the composite reaches 6.37 g/m2, which is 266% higher than that of the ePTFE membrane. The dust holding capacity of the composite increases as the dust layer fiber diameter decreases. When the fiber diameter of the dust layer is 1.462 μm, the dust holding capacity of the composite increases to 7.96 g/m2, which is 357% higher than that of the ePTFE membrane. After electret treatment, when the fiber diameter of the dust layer is 3.611 μm, the dust holding capacity of the composite increases by 136% compared with that before electret treatment.

Key words: expanded polytetrafluoroethylene, glass fiber filter paper, polypropylene melt blown filter material, dust holding capacity, air filter

中图分类号: 

  • TB332

表1

ePTFE膜及玻璃纤维滤纸参数表"

材料 过滤效率/
%		 过滤阻力/
Pa		 厚度/
mm		 面密度/
(g·m-2)
ePTFE膜 99.984 146.98 0.43 83.0
玻璃纤维滤纸 99.976 276.53 0.53 76.0

图1

复合材料结构示意图"

表2

原材料性能参数"

材料
序号		 样品厚度/
mm		 面密度/
(g·m-2)		 纤维直径/
μm		 过滤阻力/
Pa		 过滤效率/
%
1-1 0.43 83.0 — 146.98 99.984
1-2 0.53 76.0 — 276.53 99.976
2-1 0.15 9.2 2.297 10.58 13.877
2-2 0.21 15.1 2.297 14.52 17.668
2-3 0.31 21.6 2.297 20.00 25.574
2-4 0.45 28.8 2.297 31.23 36.475
3-1 0.46 28.8 1.462 42.83 51.157
3-2 0.45 28.8 2.297 31.23 36.475
3-3 0.45 29.8 2.875 22.43 24.103
3-4 0.46 29.8 3.611 15.13 15.173
3-5 0.47 27.8 5.552 5.60 5.772
4-1 0.43 28.8 1.462 41.35 99.998
4-2 0.42 28.8 2.297 35.80 99.988
4-3 0.43 29.8 2.875 23.13 99.848
4-4 0.43 29.8 3.611 15.33 98.443
4-5 0.44 27.8 5.552 6.75 89.530

图2

ePTFE膜和玻璃纤维滤纸的容尘曲线"

图3

容尘前后ePTFE膜和玻璃纤维滤纸表面SEM照片(× 2 000)"

图4

不同容尘层厚度复合材料阻力增长速率曲线"

图5

不同容尘层厚度复合材料容尘量比较"

图6

容尘后ePTFE膜和容尘层表面SEM照片(× 2 000)"

图7

容尘层不同纤维直径复合材料阻力增长速率"

图8

容尘层不同纤维直径复合材料容尘量对比"

图9

容尘后ePTFE膜表面和容尘层迎风/背风表面SEM照片(× 2 000)"

图10

不同纤维直径容尘层驻极前后复合材料的容尘量对比"

图11

驻极容尘后ePTFE膜表面和容尘层迎风/背风面SEM照片(× 2 000)"

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