Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (05): 63-69.doi: 10.13475/j.fzxb.20210701908

• Fiber Materials • Previous Articles     Next Articles

Influence of nanofiber membrane wettability on gas-liquid filtration performance of sandwiched composite filters

CHEN Feng1,2(), JI Zhongli1,2, YU Wenhan1,2, DONG Wuqiang1,2, WANG Qianlin3, WANG Deguo1,2   

  1. 1. Beijing Key Laboratory of Process Fluid Filtration and Separation Technology, China University of Petroleum, Beijing 102249, China
    2. College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China
    3. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2021-07-06 Revised:2022-01-15 Online:2022-05-15 Published:2022-05-30

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Abstract:

In order to improve the gas-liquid filtration performance of nanofibers membrane, nanofibers membrane with different material components were prepared by electrospinning, and sandwiched composite filters were created when combining such nanofibers membrane with glass fiber substrates with different degrees of wettability. The influence of the nanofiber membrane wettability on the gas-liquid filtration performance of composite filter was analyzed, and the relationship between the wettability of glass fiber substrates and nanofibers membrane was studied. The results show that after the nanofibers membrane are added to the oleophilic substrate, the filtration efficiency for submicron droplets increases by 11.9% when compared to the original glass fiber substrates, and the quality factor increases with the increase of nanofiber membrane wettability. The steady-state pressure drop increases significantly after adding nanofibers membrane to the oleophobic glass fiber substrate, but the quality factors for submicron and micron droplets both decrease even when the filtration efficiency also increases greatly, with the highest decrease of 57% and 63% respectively when compared to the original glass fiber substrates. The filtration performance of the composite filter material is controlled by the substrate wettability. The comprehensive filtration performance is improved only when the substrate filter located on the leeward side is oleophilic.

Key words: electrospinning, nanofiber membrane, glass fiber substrate, wettability, composite filter, gas-liquid filtration performance

CLC Number: 

  • TE832

Tab.1

Physical parameters of glass fiber substrates"

基材类型 厚度/mm 平均直径/
μm		 平均孔
径/μm		 泡点孔
径/μm
亲油基材 0.46 3.07 7.76 26.11
疏油基材 0.56 3.09 7.76 25.35

Fig.1

Schematic diagram of electrospinning system"

Fig.2

Experimental system for testing gas-liquid filtration performance of filters"

Fig.3

SEM images of different polymer nanofibers membranes (×10 000)"

Fig.4

Contact angles of droplets on different filter surface"

Fig.5

Pressure drop curves of composite filters based on oleophilic substrates"

Fig.6

Steady-state filtration efficiency of composite filters based on oleophilic substrates"

Fig.7

Steady-state quality factors of composite filters based on oleophilic substrates"

Fig.8

Pressure drop curves of composite filters based on oleophobic substrates"

Fig.9

Steady-state filtration efficiency of composite filters based on oleophobic substrates"

Fig.10

Steady-state quality factors of composite filters based on oleophobic substrates"

Fig.11

Pressure drop curves of different filters. (a) Oleophilic/oleophobic substrates; (b) Oleophobic/oleophilic substrates"

Fig.12

Steady-state filtration efficiency of different filters. (a) Oleophilic/oleophobic substrates; (b) Oleophobic/oleophilic substrates"

Fig.13

Steady-state quality factors of different filters. (a) Oleophilic/oleophobic substrates; (b) Oleophobic/oleophilic substrates"

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