Chem. J. Chinese Universities ›› 2016, Vol. 37 ›› Issue (12): 2306.doi: 10.7503/cjcu20160429
• Polymer Chemistry • Previous Articles Next Articles
WU Linghui1,2, WANG Bin1,2, WANG Jiaona1,2, LI Congju1,2,3,*()
Received:
2016-06-13
Online:
2016-12-10
Published:
2016-11-18
Contact:
LI Congju
E-mail:congjuli2014@126.com
Supported by:
CLC Number:
TrendMD:
WU Linghui, WANG Bin, WANG Jiaona, LI Congju. Preparation and Filtration Performance of Antifouling PVA/PVDF Composite Ultrafiltration Membrane Based on Electrospinning Technology†[J]. Chem. J. Chinese Universities, 2016, 37(12): 2306.
Scheme 1 Fabrication flow chart of the composite ultrafiltration membrane with PET non-woven fabric as substrate and PVDF nanofibers as middle layer and PVA nanofibers as the barrier layer
Fig.3 SEM images of composite ultrafiltration membrane surface morphology with different PVA nanofibers electrospinning timeTime/h: (A) 1; (B) 2; (C) 3; (D) 4; (E) 5.
Fig.4 Surface morphology of composite ultrafiltration membrane at different crosslinked temperatures Temperature/℃: (A) 20; (B) 30; (C) 40; (D) 50 ; (E) 60.
Temperature/℃ | 20 | 30 | 40 | 50 | 60 |
---|---|---|---|---|---|
mL(%) | 0.38 | 0 | 0.35 | 0.13 | 0.25 |
mS(%) | 80.08 | 70.82 | 74.35 | 73.15 | 69.59 |
Table 1 Massloss rates and swelling degrees of the composite ultrafiltration membranes under different crosslinking temperatures
Temperature/℃ | 20 | 30 | 40 | 50 | 60 |
---|---|---|---|---|---|
mL(%) | 0.38 | 0 | 0.35 | 0.13 | 0.25 |
mS(%) | 80.08 | 70.82 | 74.35 | 73.15 | 69.59 |
Fig.6 Water contact angles of different nanofiber layers(A) PVDF layer; (B) PVA layer; (C) crosslinked PVA layer; (D) cross-section morphology of (C).
Fig.7 Separation of the dead-end filtration usingthe composite ultrafiltration membrane with different PVA electrospinning time(A) Change of the flux by filter oil/water emulsions; (B) change of the rejection rate by filter oil/water emulsions; (C) change of the flux by filter pure water. Time/h: a. 1; b. 2; c. 3; d. 4; e. 5.
Number of recycle | 1 | 2 | 3 | 4 | 5 |
---|---|---|---|---|---|
Rl(%) | 26.17 | 28.99 | 27.97 | 26.73 | |
Rr(%) | 73.83 | 71.01 | 72.03 | 73.27 |
Table 2 The loss rate(Rl) and flux recovery rate(Rr) of the composite ultrafiltration membrane after recycling
Number of recycle | 1 | 2 | 3 | 4 | 5 |
---|---|---|---|---|---|
Rl(%) | 26.17 | 28.99 | 27.97 | 26.73 | |
Rr(%) | 73.83 | 71.01 | 72.03 | 73.27 |
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