Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (04): 32-37.doi: 10.13475/j.fzxb.20180503506

• Fiber Materials • Previous Articles     Next Articles

Preparation of graphene oxide/polyvinglidene fluoride composite filtration membrane and its filtration performance

HU Xuemin1(), YANG Wenxiu1, LI Teng2   

  1. 1. College of Textile and Garment, Hebei University of Science and Technology, Shijiazhuang, Hebei 050000, China
    2. College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
  • Received:2018-05-15 Revised:2019-01-10 Online:2019-04-15 Published:2019-04-16

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Abstract:

In order to obtain high-filtration efficiency low-filtration resistance materials for air filtration, high performance graphene oxide/polyinglidene fluoride(PVDF) composite filtration membrane were prepared by blending graphene oxide particles into spinning solution using N,N-dimethylformamide/acetone as mixed solvents and PVDF as matrix, and electrospinning. The effects of PVDF concentration, graphene oxide concentration, electrospinning voltage and receiving distance on the morphology, filtration efficiency and filter resistance properties of high performance graphene oxide filtration membrane were discussed. The results show that under the conditions of PVDF mass fraction of 16%, graphene oxide mass fraction of 1.0%, electrospinning voltage of 29.0 kV and receiving distance of 16 cm, the prepared composite filtration membrane has good morphology and continuous and uniform fiber. The filtration efficiency of the composite filtration membrane is 99.99%, and the filtration resistance is 11.53 Pa/μm. The composite membrane has good filtering performance.

Key words: graphene oxide/polyvinylidene fluoride composite fiber, filtration membrane, electrospinning, filtration efficiency, filtration resistance

CLC Number: 

  • TQ340.64

Fig.1

Schematic diagram of electrospinning"

Fig.2

SEM images of GO/PVDF fiber membrane under different mass fraction of PVDF"

Fig.3

SEM images of GO/PVDF fiber membrane under different mass fraction of graphene oxide"

Tab.1

Coefficient of variation of fiber diameter under different mass fraction of graphene oxide"

GO质量分数/% 平均直径/nm 标准偏差/nm 变异系数/%
1.0 167 0.32 19
1.5 252 0.99 39
2.0 177 0.48 27

Fig.4

SEM images of GO/PVDF fiber membrane under different voltage"

Tab.2

Performance of GO/PVDF fiber membrane under different voltage"

纺丝电压/kV 过滤效率/% 孔隙率/% 过滤阻力/(Pa·μm-1)
25.0 99.96 68 20.80
27.5 99.98 82 14.69
30.0 99.98 76 28.93

Tab.3

Performance of GO/PVDF fiber membrane under different deposition distance"

接收距离/cm 过滤效率/% 孔隙率/% 过滤阻力/(Pa·μm-1)
12 99.94 70 12.50
14 99.98 80 14.69
16 99.91 82 12.26

Tab.4

Results of orthogonal experiment"

试验
编号		 PVDF质量
分数/%		 GO质量分
数/%		 纺丝电压/
kV		 过滤阻力/
(Pa·μm-1)
1 15 0.8 26.0 28.07
2 15 1.0 27.5 14.61
3 15 1.2 29.0 12.87
4 16 0.8 27.5 16.28
5 16 1.0 29.0 11.53
6 16 1.2 26.0 16.40
7 17 0.8 29.0 11.73
8 17 1.0 26.0 18.87
9 17 1.2 27.5 16.35
K1 55.55 56.08 63.34
K2 44.21 45.01 47.24
K3 46.95 45.62 36.13
k1 18.52 18.69 21.11
k2 14.74 15.00 15.75
k3 15.65 15.21 12.04
R 3.78 3.69 9.07

Fig.5

SEM images of GO/PVDF fiber membrane under optimal electrospinning conditions"

Tab.5

Filtration performance of PVDF and GO/PVDF fiber membrane"

纤维膜名称 过滤效率/% 孔隙率/% 过滤阻力/(Pa·μm-1)
PVDF 78.70 75 4.89
GO/PVDF 99.99 85 11.53

Tab.6

Effect of filtration time on filtration efficiency and filtration resistance of GO/PVDF fiber membrane"

过滤时
间/min		 PVDF纤维膜 GO/PVDF 纤维膜
过滤效率/
%		 过滤阻力/
(Pa·μm-1)		 过滤效率/
%		 过滤阻力/
(Pa·μm-1)
0 78.7 4.89 99.99 11.53
10 78.8 4.89 99.99 11.54
20 78.8 4.89 99.99 11.55
30 78.8 4.90 99.99 11.55
40 78.8 4.90 99.99 11.56
50 78.8 4.90 99.99 11.56
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