纺织学报 ›› 2019, Vol. 40 ›› Issue (09): 108-113.doi: 10.13475/j.fzxb.20180904906

• 染整与化学品 • 上一篇    下一篇

纳米发泡整理对芳纶过滤材料性能的影响

缪特1, 张如全1,2(), 冯阳3   

  1. 1.武汉纺织大学 纺织科学与工程学院, 湖北 武汉 430200
    2.武汉纺织大学 纺织纤维及制品教育部重点实验室, 湖北 武汉 430200
    3.江苏奥凯环境技术有限公司, 江苏 靖江 214500
  • 收稿日期:2018-09-18 修回日期:2019-02-20 出版日期:2019-09-15 发布日期:2019-09-23
  • 通讯作者: 张如全
  • 作者简介:缪特(1993—),男,硕士生。主要研究方向为非织造材料。
  • 基金资助:
    武汉纺织大学产学研项目(1618);武汉纺织大学校基金项目(201711)

Influence of nano-foam finishing on properties of aramid filter materials

MIAO Te1, ZHANG Ruquan1,2(), FENG Yang3   

  1. 1. School of Textile Science and Engineering, Wuhan Textile University, Wuhan, Hubei 430200, China
    2. Key Laboratory of Textile Fibers and Products, Ministry of Education, Wuhan Textile University, Wuhan, Hubei 430200, China
    3. Jiangsu Okay Environmental Technology Co., Ltd., Jingjiang, Jiangsu 214500, China
  • Received:2018-09-18 Revised:2019-02-20 Online:2019-09-15 Published:2019-09-23
  • Contact: ZHANG Ruquan

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摘要：

为提高芳纶过滤材料的过滤效率,以添加不同质量分数纳米陶瓷粉的聚四氟乙烯乳液为涂层剂主要原料,采用发泡剂发泡涂层法对芳纶材料进行表面涂层处理。研究了泡沫涂层对芳纶过滤材料的结构、耐摩擦性、透气性、孔径大小、拒水拒酸碱性以及过滤性能的影响。结果表明:经发泡涂层整理后,芳纶表面形成一层致密薄膜;纳米陶瓷粉质量分数越大,发泡剂发泡效果越好,薄膜愈致密且稳定,同时芳纶过滤材料的耐摩擦性愈好,其孔径大小及透气性略有下降;涂层提高了芳纶的拒酸、拒碱性能,有效减少了滤袋的糊袋,使其清灰性及使用寿命均有所提升;涂层后芳纶的过滤效率显著提高,过滤直径为1 μm以上颗粒物的过滤效率由39.1%提升到60%左右,且过滤直径为10 μm以上颗粒物的过滤效率可达到100%。

关键词: 聚四氟乙烯乳液, 泡沫涂层, 耐高温过滤材料, 纳米陶瓷粉, 芳纶, 过滤效率

Abstract:

In order to improve the filtration efficiency of the aramid filter material, the polytetrafluoroethylene (PTFE) aqueous emulsion was used as the main raw material to conduct coating treatment on the surface of aramid filter material by foam coating method. The influence of foam coating on the structure, friction resistance, air permeability, pore size, hydrophobicity, acid and alkali resistance, and the filtration performance of the filter material were studied. The test results show that a dense film is formed on the surface of the filter after foamed coating. With the increase of the amount of ceramic powder, the foaming effect of the coating solution becomes better, and film formed on the surface of the filter material is denser. Besides, the friction resistance performance of filter material is improved as well as the air permeability slightly decreases. The coating treatment not only improves the acid and alkali resistance and ash removal performance of the filter material and prolonged its service life, but also reduces dust attachment. The filtration performance test shows that the filtration efficiency of the filter material after coating has a remarkable improvement, and the filtration efficiency for the particulate matter above 1 μm increases from 39.1% to 60%, and particulate matter above 10 μm is filtrated by 100%.

Key words: polytetrafluoroethylene emulsion, foam coating, high temperature resistant filter material, ceramic nanopowder, aramid fiber, filtration efficiency

中图分类号: 

  • TS174.3

表1

不同摩擦次数时芳纶过滤材料的质量差"

过滤材料 0次 1 000次 2 000次 5 000次
未涂层 5.39 5.38 5.36 5.33
PTFE涂层 6.51 6.51 6.50 6.50
0.5%陶瓷粉涂层 6.88 6.88 6.87 6.87
1.0%陶瓷粉涂层 6.51 6.51 6.50 6.49

图1

涂层前后芳纶过滤材料扫描电镜照片(×500)"

图2

涂层前后芳纶的红外光谱图"

图3

不同整理过滤材料拒水接触角"

图4

不同整理过滤材料的拒酸接触角"

图5

不同整理过滤材料拒碱接触角"

表2

涂层前后芳纶过滤材料透气性"

过滤材料 正面透气量 透气量下降量
未涂层 485.4
PTFE涂层 350.2 135.2
0.5%陶瓷粉涂层 322.9 162.5
1.0%陶瓷粉涂层 316.5 168.9

表3

涂层前后孔径测试结果"

过滤材料 最小孔径 最大孔径 平均孔径
未涂层 8.5 62.6 23.4
PTFE涂层 6.5 33.4 14.7
0.5%陶瓷粉涂层 5.8 33.0 13.3
1.0%陶瓷粉涂层 5.4 31.2 12.5

图6

过滤材料对不同粒径颗粒物的过滤效率"

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